Holocene

Last updated
Subdivisions of the Quaternary Period
System/
Period
Series/
Epoch
Stage/
Age
Age
Quaternary Holocene Meghalayan 04,200
Northgrippian 4,2008,200
Greenlandian 8,20011,700
Pleistocene 'Upper' 11,700129ka
Chibanian 129ka774ka
Calabrian 774ka1.80Ma
Gelasian 1.80Ma2.58Ma
Neogene Pliocene Piacenzian 2.58Ma3.60Ma
Notes and references [1] [2]
Subdivision of the Quaternary Period according to the ICS, as of January 2020. [1]

For the Holocene, dates are relative to the year 2000 (e.g. Greenlandian began 11,700 years before 2000). For the beginning of the Northgrippian a date of 8,236 years before 2000 has been set. [2] The Meghalayan has been set to begin 4,250 years before 2000. [1]

Contents

'Tarantian' is an informal, unofficial name proposed for a stage/age to replace the equally informal, unofficial 'Upper Pleistocene' subseries/subepoch.

In Europe and North America, the Holocene is subdivided into Preboreal, Boreal, Atlantic, Subboreal, and Subatlantic stages of the Blytt–Sernander time scale. There are many regional subdivisions for the Upper or Late Pleistocene; usually these represent locally recognized cold (glacial) and warm (interglacial) periods. The last glacial period ends with the cold Younger Dryas substage.

The Holocene ( /ˈhɒl.əˌsn,ˈhɒl.-,ˈh.lə-,ˈh.l-/ HOL-ə-seen, HOL-oh-, HOH-lə-, HOH-loh-) [3] [4] is the current geological epoch. It began approximately 11,650 cal years before present, after the last glacial period, which concluded with the Holocene glacial retreat. [5] The Holocene and the preceding Pleistocene [6] together form the Quaternary period. The Holocene has been identified with the current warm period, known as MIS 1. It is considered by some to be an interglacial period within the Pleistocene Epoch, called the Flandrian interglacial. [7]

The Holocene corresponds with rapid proliferation, growth and impacts of the human species worldwide, including all of its written history, technological revolutions, development of major civilizations, and overall significant transition towards urban living in the present. The human impact on modern-era Earth and its ecosystems may be considered of global significance for the future evolution of living species, including approximately synchronous lithospheric evidence, or more recently hydrospheric and atmospheric evidence of the human impact. In July 2018, the International Union of Geological Sciences split the Holocene epoch into three distinct subsections, Greenlandian (11,700 years ago to 8,200 years ago), Northgrippian (8,200 years ago to 4,200 years ago) and Meghalayan (4,200 years ago to the present), as proposed by International Commission on Stratigraphy. [8] The boundary stratotype of the Meghalayan is a speleothem in Mawmluh cave in India, [9] and the global auxiliary stratotype is an ice core from Mount Logan in Canada. [10]

Etymology

The word is formed from two Ancient Greek words. Holos (ὅλος) is the Greek word for "whole." "Cene" comes from the Greek word kainos (καινός), meaning "new." The concept is that this epoch is "entirely new." [11] [12] [13] The suffix '-cene' is used for all the seven epochs of the Cenozoic Era.

Overview

It is accepted by the International Commission on Stratigraphy that the Holocene started approximately 11,650 cal years BP. [5] The Subcommission on Quaternary Stratigraphy deprecates the term 'Recent' as an alternative to Holocene; it also observes that the term Flandrian, derived from marine transgression sediments on the Flanders coast of Belgium, has been used as a synonym for Holocene by authors who consider the last 10,000 years should have the same stage-status as previous interglacial events and thus be included in the Pleistocene. [14] The International Commission on Stratigraphy, however, considers the Holocene an epoch following the Pleistocene and specifically the last glacial period. Local names for the last glacial period include the Wisconsinan in North America, [15] the Weichselian in Europe, [16] the Devensian in Britain, [17] the Llanquihue in Chile [18] and the Otiran in New Zealand. [19]

The Holocene can be subdivided into five time intervals, or chronozones, based on climatic fluctuations: [20]

Note: "ka BP" means "kilo-annum Before Present", i.e. 1,000 years before 1950 (non-calibrated C14 dates)
Evolution of temperatures in the Post-Glacial period, after the Last Glacial Maximum, according to Greenland ice cores. Evolution of temperature in the Post-Glacial period according to Greenland ice cores.jpg
Evolution of temperatures in the Post-Glacial period, after the Last Glacial Maximum, according to Greenland ice cores.

Geologists working in different regions are studying sea levels, peat bogs and ice core samples by a variety of methods, with a view toward further verifying and refining the Blytt–Sernander sequence. This is a classification of climatic periods initially defined by plant remains in peat mosses. [22] Though the method was once thought to be of little interest, based on 14C dating of peats that was inconsistent with the claimed chronozones, [23] investigators have found a general correspondence across Eurasia and North America. The scheme was defined for Northern Europe, but the climate changes were claimed to occur more widely. The periods of the scheme include a few of the final pre-Holocene oscillations of the last glacial period and then classify climates of more recent prehistory. [24]

Paleontologists have not defined any faunal stages for the Holocene. If subdivision is necessary, periods of human technological development, such as the Mesolithic, Neolithic, and Bronze Age, are usually used. However, the time periods referenced by these terms vary with the emergence of those technologies in different parts of the world.[ citation needed ]

Climatically, the Holocene may be divided evenly into the Hypsithermal, with warmer temperatures on average in many regions, and Neoglacial periods. The boundary coincides with the start of the Bronze Age in Europe.

According to some scholars, a third division, the Anthropocene, has now begun. [25] This term is used to denote the present time interval in which many geologically significant conditions and processes have been profoundly altered by human activities. The ‘Anthropocene’ (a term coined by Paul Crutzen and Eugene Stoermer in 2000) is not a formally defined geological unit. The Subcommission on Quaternary Stratigraphy of the International Commission on Stratigraphy has a working group to determine whether it should be. In May 2019, members of the working group voted in favour of recognizing the Anthropocene as formal chrono-stratigraphic unit, with stratigraphic signals around the mid-twentieth century C.E. as its base. The exact criteria have still to be decided upon, after which the recommendation also has to be approved by the working group’s parent bodies (ultimately the International Union of Geological Sciences). [26]

Geology

Holocene cinder cone volcano on State Highway 18 near Veyo, Utah VeyoVolcano.jpg
Holocene cinder cone volcano on State Highway 18 near Veyo, Utah
Current Earth - showing topography of the land and bathymetry of the oceans Elevation.jpg
Current Earth – showing topography of the land and bathymetry of the oceans

Continental motions due to plate tectonics are less than a kilometre over a span of only 10,000 years. However, ice melt caused world sea levels to rise about 35 m (115 ft) in the early part of the Holocene. In addition, many areas above about 40 degrees north latitude had been depressed by the weight of the Pleistocene glaciers and rose as much as 180 m (590 ft) due to post-glacial rebound over the late Pleistocene and Holocene, and are still rising today. [27]

The sea level rise and temporary land depression allowed temporary marine incursions into areas that are now far from the sea. Holocene marine fossils are known, for example, from Vermont and Michigan. Other than higher-latitude temporary marine incursions associated with glacial depression, Holocene fossils are found primarily in lakebed, floodplain, and cave deposits. Holocene marine deposits along low-latitude coastlines are rare because the rise in sea levels during the period exceeds any likely tectonic uplift of non-glacial origin.[ citation needed ]

Post-glacial rebound in the Scandinavia region resulted in the formation of the Baltic Sea. Earthquakes are a leading cause of sediment deformation, leading to the creation and destruction of bodies of water. [28] The region continues to rise, still causing weak earthquakes across Northern Europe. The equivalent event in North America was the rebound of Hudson Bay, as it shrank from its larger, immediate post-glacial Tyrrell Sea phase, to near its present boundaries. [29]

Climate

Greenland ice sheet temperatures interpreted with 18O isotope from 6 ice cores (Vinther, B., et al., 2009) HoloceneTemperatureOfGreenland VintherEtAl2009-en.svg
Greenland ice sheet temperatures interpreted with 18O isotope from 6 ice cores (Vinther, B., et al., 2009)
Paleogeographic reconstruction of the North Sea approximately 9,000 years ago during the early Holocene and after the end of the last ice age. Doggerland.svg
Paleogeographic reconstruction of the North Sea approximately 9,000 years ago during the early Holocene and after the end of the last ice age.

Climate has been fairly stable over the Holocene. Ice core records show that before the Holocene there was global warming after the end of the last ice age and cooling periods, but climate changes became more regional at the start of the Younger Dryas. During the transition from the last glacial to the Holocene, the Huelmo–Mascardi Cold Reversal in the Southern Hemisphere began before the Younger Dryas, and the maximum warmth flowed south to north from 11,000 to 7,000 years ago. It appears that this was influenced by the residual glacial ice remaining in the Northern Hemisphere until the later date.[ citation needed ]

The Holocene climatic optimum (HCO) was a period of warming in which the global climate became warmer. However, the warming was probably not uniform across the world. This period of warmth ended about 5,500 years ago with the descent into the Neoglacial and concomitant Neopluvial. At that time, the climate was not unlike today's, but there was a slightly warmer period from the 10th–14th centuries known as the Medieval Warm Period. This was followed by the Little Ice Age, from the 13th or 14th century to the mid-19th century.

The temporal and spatial extent of Holocene climate change is an area of considerable uncertainty, with radiative forcing recently proposed to be the origin of cycles identified in the North Atlantic region. Climate cyclicity through the Holocene (Bond events) has been observed in or near marine settings and is strongly controlled by glacial input to the North Atlantic. [30] [31] Periodicities of ≈2500, ≈1500, and ≈1000 years are generally observed in the North Atlantic. [32] [33] [34] At the same time spectral analyses of the continental record, which is remote from oceanic influence, reveal persistent periodicities of 1,000 and 500 years that may correspond to solar activity variations during the Holocene epoch. [35] A 1,500-year cycle corresponding to the North Atlantic oceanic circulation may have had widespread global distribution in the Late Holocene. [35]

Ecological developments

Animal and plant life have not evolved much during the relatively short Holocene, but there have been major shifts in the distributions of plants and animals. A number of large animals including mammoths and mastodons, saber-toothed cats like Smilodon and Homotherium , and giant sloths disappeared in the late Pleistocene and early Holocene—especially in North America, where animals that survived elsewhere (including horses and camels) became extinct. This extinction of American megafauna has been blamed by some on the Clovis people, who vanished at the same time, though climatic change or a bolide impact are favored by others. [36] [37]

Throughout the world, ecosystems in cooler climates that were previously regional have been isolated in higher altitude ecological "islands". [38]

The 8.2 ka event , an abrupt cold spell recorded as a negative excursion in the δ18O record lasting 400 years, is the most prominent climatic event occurring in the Holocene epoch, and may have marked a resurgence of ice cover. It has been suggested that this event was caused by the final drainage of Lake Agassiz, which had been confined by the glaciers, disrupting the thermohaline circulation of the Atlantic. [39] Subsequent research, however, suggested that the discharge was probably superimposed upon a longer episode of cooler climate lasting up to 600 years and observed that the extent of the area affected was unclear. [40]

Human developments

Bronze bead necklace, Museum de Toulouse Collier de Penne.jpg
Bronze bead necklace, Muséum de Toulouse

The beginning of the Holocene corresponds with the beginning of the Mesolithic age in most of Europe, but in regions such as the Middle East and Anatolia with a very early neolithisation, Epipaleolithic is preferred in place of Mesolithic. Cultures in this period include Hamburgian, Federmesser, and the Natufian culture, during which the oldest inhabited places still existing on Earth were first settled, such as Tell es-Sultan (Jericho) in the Middle East. [41] There is also evolving archeological evidence of proto-religion at locations such as Göbekli Tepe, as long ago as the 9th millennium BCE. [42]

Both are followed by the aceramic Neolithic (Pre-Pottery Neolithic A and Pre-Pottery Neolithic B) and the pottery Neolithic. The Late Holocene brought advancements such as the bow and arrow and saw new methods of warfare in North America. Spear throwers and their large points were replaced by the bow and arrow with its small narrow points beginning in Oregon and Washington. Villages built on defensive bluffs indicate increased warfare, leading to food gathering in communal groups for protection rather than individual hunting. [43]

See also

Related Research Articles

The Pleistocene is the geological epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the world's most recent period of repeated glaciations. The end of the Pleistocene corresponds with the end of the last glacial period and also with the end of the Paleolithic age used in archaeology.

Quaternary Third and current period of the Cenozoic Era 2.59–0 million years ago

Quaternary is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy (ICS). It follows the Neogene Period and spans from 2.588 ± 0.005 million years ago to the present. The Quaternary Period is divided into two epochs: the Pleistocene and the Holocene. The informal term "Late Quaternary" refers to the past 0.5–1.0 million years.

The Younger Dryas was a return to glacial conditions after the Late Glacial Interstadial, which temporarily reversed the gradual climatic warming after the Last Glacial Maximum (LGM) started receding around 20,000 BP. It is named after an indicator genus, the alpine-tundra wildflower Dryas octopetala, as its leaves are occasionally abundant in late glacial, often minerogenic-rich sediments, such as the lake sediments of Scandinavia.

The 10th millennium BC spanned the years 10,000 BC to 9001 BC. It marks the beginning of the transition from the Palaeolithic to the Neolithic via the interim Mesolithic and Epipaleolithic periods, which together form the first part of the Holocene epoch that is generally reckoned to have begun c. 9700 BC and is the current geological epoch. It is impossible to precisely date events that happened around the time of this millennium and all dates mentioned here are estimates mostly based on geological and anthropological analysis.

Last Glacial Period The most recent glacial period with major glaciations of the northern hemisphere (115 000 - 12 000 years ago)

The Last Glacial Period (LGP) occurred from the end of the Eemian to the end of the Younger Dryas, encompassing the period c. 115,000 – c. 11,700 years ago. The LGP is part of a larger sequence of glacial and interglacial periods known as the Quaternary glaciation which started around 2,588,000 years ago and is ongoing. The definition of the Quaternary as beginning 2.58 million years ago is based on the formation of the Arctic ice cap. The Antarctic ice sheet began to form earlier, at about 34 Ma, in the mid-Cenozoic. The term Late Cenozoic Ice Age is used to include this early phase.

Timeline of glaciation Chronology of the major ice ages of the Earth

There have been five or six major ice ages in the history of Earth over the past 3 billion years. The Late Cenozoic Ice Age began 34 million years ago, its latest phase being the Quaternary glaciation, in progress since 2.58 million years ago.

The Holocene Climate Optimum (HCO) was a warm period during roughly the interval 9,000 to 5,000 years BP, with a thermal maximum around 8000 years BP. It has also been known by many other names, such as Altithermal, Climatic Optimum, Holocene Megathermal, Holocene Optimum, Holocene Thermal Maximum, Hypsithermal, and Mid-Holocene Warm Period.

The Illinoian Stage is the name used by Quaternary geologists in North America to designate the period c.191,000 to c.130,000 years ago, during the middle Pleistocene, when sediments comprising the Illinoian Glacial Lobe were deposited. It precedes the Sangamonian Stage and follows the Pre-Illinoian Stage in North America. The Illinoian Stage is defined as the period of geologic time during which the glacial tills and outwash, which comprise the bulk of the Glasford Formation, accumulated to create the Illinoian Glacial Lobe. It occurs at about the same time as the penultimate glacial period.

The Gelasian is an age in the international geologic timescale or a stage in chronostratigraphy, being the earliest or lowest subdivision of the Quaternary period/system and Pleistocene epoch/series. It spans the time between 2.588 ± 0.005 Ma and 1.806 ± 0.005 Ma. It follows the Piacenzian stage and is followed by the Calabrian stage.

Mammoth steppe

During the Last Glacial Maximum, the mammoth steppe was the Earth’s most extensive biome. It spanned from Spain eastward across Eurasia to Canada and from the arctic islands southward to China. It had a cold, dry climate; the vegetation was dominated by palatable high-productivity grasses, herbs and willow shrubs, and the animal biomass was dominated by bison, horses, and woolly mammoth. This ecosystem covered wide areas of the northern part of the globe, thrived for approximately 100,000 years without major changes, and then suddenly became all but extinct about 12,000 years ago.

The Chibanian, widely known by its previous designation of Middle Pleistocene, is an age in the international geologic timescale or a stage in chronostratigraphy, being the second division of the Pleistocene Epoch within the ongoing Quaternary Period. The Chibanian name was officially ratified in January 2020. It is currently estimated to span the time between 0.770 Ma and 0.126 Ma, also expressed as 770–126 ka. It includes the transition in palaeoanthropology from the Lower to the Middle Palaeolithic over 300 ka.

Late Pleistocene Third division (unofficial) of the Pleistocene Epoch

The Late Pleistocene is an unofficial age in the international geologic timescale in chronostratigraphy, also known as Upper Pleistocene from a stratigraphic perspective. It is intended to be the fourth division of the Pleistocene Epoch within the ongoing Quaternary Period. It is currently estimated to span the time between c. 129,000 and c. 11,700 years ago. The Late Pleistocene equates to the proposed Tarantian Age of the geologic time scale, preceded by the officially ratified Chibanian and succeeded by the officially ratified Greenlandian. The estimated beginning of the Tarantian is the start of the Eemian interglacial period. It is held to end with the termination of the Younger Dryas, some 11,700 years ago when the Holocene Epoch began.

Oldest Dryas

The Oldest Dryas is a biostratigraphic subdivision layer corresponding to an abrupt cooling event, or stadial, which occurred during the last glacial retreat. The time period to which the layer corresponds varies between regions, but it is generally dated as starting at 18.5-17 ka BP and ending 15-14 ka BP. As with the Younger and Older Dryas events, the stratigraphic layer is marked by abundance of the pollen and other remains of Dryas octopetala, an indicator species that colonizes arctic-alpine regions.

Quaternary glaciation Series of alternating glacial and interglacial periods

The Quaternary glaciation, also known as the Pleistocene glaciation, is an alternating series of glacial and interglacial periods during the Quaternary period that began 2.58 Ma, and is ongoing. Although geologists describe the entire time period as an "ice age", in popular culture the term "ice age" is usually associated with just the most recent glacial period during the Pleistocene. Since planet Earth still has ice sheets, geologists consider the Quaternary glaciation to be ongoing, with the Earth now experiencing an interglacial period.

The Holocene glacial retreat is a geographical phenomenon that involved the global deglaciation of glaciers that previously had advanced during the Last Glacial Maximum. Ice sheet retreat initiated ca. 19,000 years ago and accelerated after ca. 15,000 years ago. The Holocene, starting with abrupt warming 11,700 years ago, resulted in rapid melting of the remaining ice sheets of North America and Europe.

4.2 kiloyear event

The 4.2-kiloyear BP aridification event was one of the most severe climatic events of the Holocene epoch. It defines the beginning of the current Meghalayan age in the Holocene epoch.

8.2 kiloyear event Sudden decrease in global temperatures c. 6200 BCE

In climatology, the 8.2-kiloyear event was a sudden decrease in global temperatures that occurred approximately 8,200 years before the present, or c. 6,200 BC, and which lasted for the next two to four centuries. It defines the start of the Northgrippian age in the Holocene epoch. Milder than the Younger Dryas cold spell before it but more severe than the Little Ice Age after it, the 8.2-kiloyear cooling was a significant exception to general trends of the Holocene climatic optimum. During the event, atmospheric methane concentration decreased by 80 ppb, an emission reduction of 15%, by cooling and drying at a hemispheric scale.

Weichselian glaciation

Weichselian glaciation refers to the last glacial period and its associated glaciation in northern parts of Europe. In the Alpine region it corresponds to the Würm glaciation. It was characterized by a large ice sheet that spread out from the Scandinavian Mountains and extended as far as the east coast of Schleswig-Holstein, the March of Brandenburg and Northwest Russia.

Carbajal Valley

The Carbajal Valley is a valley in the Fuegian Andes of southern Tierra del Fuego Province, Argentina. The Carbajal valley is approximately 20 kilometres (12 mi) long, running west to east, between the Alvear mountain range to the north and the Vinciguerra range to the south. Andes peak heights in the region are generally less than 1,250 metres (4,100 ft) above sea level.

Early Holocene sea level rise Sea level rise between 12,000 and 17,000 years ago

The early Holocene sea level rise (EHSLR) was a significant jump in sea level by about 60 m during the early Holocene, between about 12,000 and 7,000 years ago, spanning the Eurasian Mesolithic. The rapid rise in sea level and associated climate change, notably the 8.2 ka cooling event , and the loss of coastal land favoured by early farmers, may have contributed to the spread of the Neolithic to Europe.

References

  1. 1 2 3 Cohen, K. M.; Finney, S. C.; Gibbard, P. L.; Fan, J.-X. (January 2020). "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy. Retrieved 23 February 2020.
  2. 1 2 Mike Walker; et al. (December 2018). "Formal ratification of the subdivision of the Holocene Series/Epoch (Quaternary System/Period)" (PDF). Episodes. Subcommission on Quaternary Stratigraphy (SQS). 41 (4): 213–223. doi:10.18814/epiiugs/2018/018016 . Retrieved 11 November 2019.This proposal on behalf of the SQS has been approved by the International Commission on Stratigraphy (ICS) and formally ratified by the Executive Committee of the International Union of Geological Sciences (IUGS).
  3. "Holocene". Merriam-Webster Dictionary . Retrieved February 11, 2018.
  4. "Holocene". Dictionary.com Unabridged. Random House . Retrieved February 11, 2018.
  5. 1 2 Walker, Mike; Johnsen, Sigfus; Rasmussen, Sune Olander; Popp, Trevor; Steffensen, Jorgen-Peder; Gibrard, Phil; Hoek, Wim; Lowe, John; Andrews, John; Bjo Rck, Svante; Cwynar, Les C.; Hughen, Konrad; Kersahw, Peter; Kromer, Bernd; Litt, Thomas; Lowe, David J.; Nakagawa, Takeshi; Newnham, Rewi; Schwander, Jakob (2009). "Formal definition and dating of the GSSP (Global Stratotype Section and Point) for the base of the Holocene using the Greenland NGRIP ice core, and selected auxiliary records" (PDF). Journal of Quaternary Science . 24 (1): 3–17. Bibcode:2009JQS....24....3W. doi:10.1002/jqs.1227.
  6. Fan, Junxuan; Hou, Xudong. "International Chronostratigraphic Chart". International Commission on Stratigraphy . Retrieved June 18, 2016.
  7. Oxford University Press – Why Geography Matters: More Than Ever (book) – "Holocene Humanity" section https://books.google.com/books?id=7P0_sWIcBNsC
  8. Amos, Jonathan (2018-07-18). "Welcome to the Meghalayan Age a new phase in history". BBC News.
  9. "Collapse of civilizations worldwide defines youngest unit of the Geologic Time Scale".
  10. Formal subdivision of the Holocene Series/Epoch
  11. The name "Holocene" was proposed in 1850 by the French palaeontologist and entomologist Paul Gervais (1816–1879): Gervais, Paul (1850). "Sur la répartition des mammifères fossiles entre les différents étages tertiaires qui concourent à former le sol de la France" [On the distribution of mammalian fossils among the different tertiary stages which help to form the ground of France]. Académie des Sciences et Lettres de Montpellier. Section des Sciences (in French). 1: 399–413. From p. 413: "On pourrait aussi appeler Holocènes, ceux de l'époque historique, ou dont le dépôt n'est pas antérieur à la présence de l'homme ; … " (One could also call "Holocene" those [deposits] of the historic era, or the deposit of which is not prior to the presence of man ; … )
  12. "Origin and meaning of Holocene". Online Etymology Dictionary . Retrieved 2019-08-08.
  13. "Origin and meaning of suffix -cene". Online Etymology Dictionary . Retrieved 2019-08-08.
  14. Gibbard, P.L. (January 4, 2016). "History of the stratigraphical nomenclature of the glacial period". Subcommission on Quaternary Stratigraphy. International Commission on Stratigraphy . Retrieved June 18, 2017.
  15. Clayton, Lee; Moran, Stephen R. (1982). "Chronology of late wisconsinan glaciation in middle North America". Quaternary Science Reviews . 1 (1): 55–82. Bibcode:1982QSRv....1...55C. doi:10.1016/0277-3791(82)90019-1.
  16. Svendsen, John Inge; Astakhov, Valery I.; Bolshiyanov, Dimitri Yu.; Demidov, Igor; Dowdeswell, Julian A.; Gataullin, Valery; Hjort, Christian; Hubberten, Hans W.; Larsen, Eiliv; Mangerud, Jan; Melles, Martin; Moller, Per; Saarnisto, Matti; Siegert, Martin J. (March 1999). "Maximum extent of the Eurasian ice sheets in the Barents and Kara Sea region during the Weichselian" (PDF). Boreas . 28 (1): 234–242. doi:10.1111/j.1502-3885.1999.tb00217.x.
  17. Eyles, Nicholas; McCabe, A. Marshall (1989). "The Late Devensian (<22,000 BP) Irish Sea Basin: The sedimentary record of a collapsed ice sheet margin". Quaternary Science Reviews . 8 (4): 307–351. Bibcode:1989QSRv....8..307E. doi:10.1016/0277-3791(89)90034-6.
  18. Denton, G.H.; Lowell, T.V.; Heusser, C.J.; Schluchter, C.; Andersern, B.G.; Heusser, Linda E.; Moreno, P.I.; Marchant, D.R. (1999). "Geomorphology, stratigraphy, and radiocarbon chronology of LlanquihueDrift in the area of the Southern Lake District, Seno Reloncavi, and Isla Grande de Chiloe, Chile" (PDF). Geografiska Annaler Series a Physical Geography. 81A (2): 167–229. doi:10.1111/j.0435-3676.1999.00057.x. S2CID   7626031.
  19. Newnham, R.M.; Vandergoes, M.J.; Hendy, C.H.; Lowe, D.J.; Preusser, F. (February 2007). "A terrestrial palynological record for the last two glacial cycles from southwestern New Zealand". Quaternary Science Reviews . 26 (3–4): 517–535. Bibcode:2007QSRv...26..517N. doi:10.1016/j.quascirev.2006.05.005.
  20. Mangerud, Jan; Anderson, Svend T.; Berglund, Bjorn E.; Donner, Joakim J. (October 1, 1974). "Quaternary stratigraphy of Norden: a proposal for terminology and classification" (PDF). Boreas . 3 (3): 109–128. doi:10.1111/j.1502-3885.1974.tb00669.x.
  21. Zalloua, Pierre A.; Matisoo-Smith, Elizabeth (6 January 2017). "Mapping Post-Glacial expansions: The Peopling of Southwest Asia". Scientific Reports. 7: 40338. Bibcode:2017NatSR...740338P. doi:10.1038/srep40338. ISSN   2045-2322. PMC   5216412 . PMID   28059138.
  22. Viau, André E.; Gajewski, Konrad; Fines, Philippe; Atkinson, David E.; Sawada, Michael C. (1 May 2002). "Widespread evidence of 1500 yr climate variability in North America during the past 14 000 yr". Geology. 30 (5): 455–458. doi:10.1130/0091-7613(2002)030<0455:WEOYCV>2.0.CO;2.
  23. Blackford, J. (1993). "Peat bogs as sources of proxy climatic data: past approaches and future research" (PDF). Climate change and human impact on the landscape. Dordrecht: Springer. pp. 47–56. Retrieved 20 November 2020.
  24. Schrøder, N.; Højlund Pedersen, L.; Juel Bitsch, R. (2004). "10,000 years of climate change and human impact on the environment in the area surrounding Lejre". The Journal of Transdisciplinary Environmental Studies. 3 (1): 1–27.
  25. Pearce, Fred (March 15, 2007). With Speed and Violence . Beacon Press. p.  21. ISBN   978-0-8070-8576-9.
  26. "Working Group on the "Anthropocene"". Subcommission on Quaternary Stratigraphy. International Commission on Stratigraphy. January 4, 2016. Retrieved June 18, 2017.
  27. Gray, Louise (October 7, 2009). "England is sinking while Scotland rises above sea levels, according to new study". The Daily Telegraph . Retrieved June 10, 2014.
  28. Holocene : perspectives, environmental dynamics, and impact events. Kotlia, Bahadur Singh. Hauppauge, N.Y.: Nova Science Publishers. 2013. ISBN   978-1622577255. OCLC   846551611.CS1 maint: others (link)
  29. Lajeuness, Patrick; Allard, Michael (2003). "The Nastapoka drift belt, eastern Hudson Bay: implications of a stillstand of the Quebec-Labrador ice margin in the Tyrrell Sea at 8 ka BP" (PDF). Canadian Journal of Earth Sciences. 40: 65–76. doi:10.1139/e02-085. Archived from the original (PDF) on 2004-03-22.
  30. Bond, G.; et al. (1997). "A Pervasive Millennial-Scale Cycle in North Atlantic Holocene and Glacial Climates" (PDF). Science . 278 (5341): 1257–1266. Bibcode:1997Sci...278.1257B. doi:10.1126/science.278.5341.1257. Archived from the original (PDF) on 2008-02-27.
  31. Bond, G.; et al. (2001). "Persistent Solar Influence on North Atlantic Climate During the Holocene". Science. 294 (5549): 2130–2136. Bibcode:2001Sci...294.2130B. doi:10.1126/science.1065680. PMID   11739949. S2CID   38179371.
  32. Bianchi, G.G.; McCave, I.N. (1999). "Holocene periodicity in North Atlantic climate and deep-ocean flow south of Iceland". Nature. 397 (6719): 515–517. Bibcode:1999Natur.397..515B. doi:10.1038/17362. S2CID   4304638.
  33. Viau, A.E.; Gajewski, K.; Sawada, M.C.; Fines, P. (2006). "Millennial-scale temperature variations in North America during the Holocene". Journal of Geophysical Research. 111 (D9): D09102. Bibcode:2006JGRD..111.9102V. doi:10.1029/2005JD006031.
  34. Debret, M.; Sebag, D.; Crosta, X.; Massei, N.; Petit, J.-R.; Chapron, E.; Bout-Roumazeilles, V. (2009). "Evidence from wavelet analysis for a mid-Holocene transition in global climate forcing" (PDF). Quaternary Science Reviews. 28 (25): 2675–2688. Bibcode:2009QSRv...28.2675D. doi:10.1016/j.quascirev.2009.06.005.
  35. 1 2 Kravchinsky, V.A.; Langereis, C.G.; Walker, S.D.; Dlusskiy, K.G.; White, D. (2013). "Discovery of Holocene millennial climate cycles in the Asian continental interior: Has the sun been governing the continental climate?". Global and Planetary Change. 110: 386–396. Bibcode:2013GPC...110..386K. doi:10.1016/j.gloplacha.2013.02.011.
  36. Dalton, Rex (May 17, 2007). "Blast from the Past? A controversial new idea suggests that a big space rock exploded on or above North America at the end of the last ice age" (PDF). Nature . 447 (7142): 256–257. Bibcode:2007Natur.447..256D. doi:10.1038/447256a. PMID   17507957. S2CID   11927411. Archived from the original (PDF) on December 1, 2017.
  37. Powell, James Lawrence. Deadly Voyager. ISBN   978-0578666778.
  38. Singh, Ashbindu (2005). One Planet, Many People: Atlas of Our Changing Environment. United Nations Environment Programme. p. 4. ISBN   9789280725711.
  39. Barber, D.C; Dyke, A.; Hillaire-Marcel, C.; Jennings, A.E.; Andrews, J.T.; Kerwin, M.W.; Bilodeau, G.; McNeely, R.; Southon, J.; Morehead, M.D.; Gagnon, J.-M. (July 22, 1999). "Forcing of the cold event of 8,200 years ago by catastrophic drainage of Laurentide lakes". Nature . 400 (6742): 344–348. Bibcode:1999Natur.400..344B. doi:10.1038/22504. S2CID   4426918.
  40. Rohling, Eelco J.; Pälike, Heiko (April 21, 2005). "Centennial-scale climate cooling with a sudden event around 8,200 years ago". Nature . 434 (7036): 975–979. Bibcode:2005Natur.434..975R. doi:10.1038/nature03421. PMID   15846336. S2CID   4394638.
  41. Chisholm, Hugh, ed. (1911). "Jericho"  . Encyclopædia Britannica (11th ed.). Cambridge University Press.
  42. Curry, Andrew (November 2008). "Göbekli Tepe: The World's First Temple?". Smithsonian Magazine . Retrieved March 14, 2009.
  43. Snow, Dean R. (2010). Archaeology of Native North America. Upper Saddle River NJ: Prentice Hall. p. 384. ISBN   9780136156864.

Further reading