Lawrence Austin Frakes (born 1930) [1] is an American-born geologist and paleoclimatologist residing in Australia since 1973. He holds (emeritus) the Douglas Mawson Professor of Geology chair, at the University of Adelaide, in South Australia. [2] Mount Frakes, a shield volcano in the Crary Mountains of Antarctica, is named for him. [3]
Lawrence Frakes is the son of Frank. B. Frakes and Elizabeth Austin (and is descended from an old ranching family near Elizabeth Lake (Los Angeles County, California)), and is a cousin of naturalist William Franklin Frakes and historian George E. Frakes. [4] Frakes studied at the University of California, Los Angeles where he earned his master's degree in 1959 (with a thesis on "The geology of the Quatal Canyon area, Kern, Ventura, and Santa Barbara Counties, California") and his Ph.D. in 1964 (entitled "Paleogeography of the Trimmers Rock Member of the Fort Littleton Formation (Devonian) in southern and eastern Pennsylvania") [5] with advisor John C. Crowell. [6] Frakes worked at University of California, University of New Mexico, Florida State University, and later in the Department of Earth Sciences at Monash University in Australia. He was named to his position as the Douglas Mawson Professor of Geology chair, at the University of Adelaide in 1985. [7] Professor Frakes was Chairman of the Dept. of Geology and Geophysics at the University of Adelaide from 1986-1989.
Frakes researches the relationship between continental drift and climate change. [8] [9] He has written a number of papers about glaciation and plate tectonics. [10] His studies of ocean sediments helped to determine the history of glaciation, [11] and have been published in well-respected journals, including Nature. [12] [13]
An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages, and greenhouse periods during which there are no glaciers on the planet. Earth is currently in the ice age called Quaternary glaciation. Individual pulses of cold climate within an ice age are termed glacial periods, and intermittent warm periods within an ice age are called interglacials or interstadials.
The PaleozoicEra is the first of three geological eras of the Phanerozoic Eon. Beginning 538.8 million years ago (Ma), it succeeds the Neoproterozoic and ends 251.9 Ma at the start of the Mesozoic Era. The Paleozoic is subdivided into six geologic periods :
The Snowball Earth is a geohistorical hypothesis that proposes during one or more of Earth's icehouse climates, the planet's surface became entirely or nearly entirely frozen with no liquid oceanic or surface water exposed to the atmosphere. The most academically referred period of such global glaciation is believed to have occurred sometime before 650 mya during the Cryogenian period.
Paleoclimatology is the scientific study of climates predating the invention of meteorological instruments, when no direct measurement data were available. As instrumental records only span a tiny part of Earth's history, the reconstruction of ancient climate is important to understand natural variation and the evolution of the current climate.
Sir Douglas Mawson was a British-born Australian geologist, Antarctic explorer, and academic. Along with Roald Amundsen, Robert Falcon Scott, and Sir Ernest Shackleton, he was a key expedition leader during the Heroic Age of Antarctic Exploration.
Mawson Station, commonly called Mawson, is one of three permanent bases and research outposts in Antarctica managed by the Australian Antarctic Division (AAD). Mawson lies in Holme Bay in Mac. Robertson Land, East Antarctica in the Australian Antarctic Territory, a territory claimed by Australia. Established in 1954, Mawson is Australia's oldest Antarctic station and the oldest continuously inhabited Antarctic station south of the Antarctic Circle. It houses approximately 20 personnel over winter and up to 53 in summer.
The Cryogenian is a geologic period that lasted from 720 to 635 million years ago. It forms the second geologic period of the Neoproterozoic Era, preceded by the Tonian Period and followed by the Ediacaran.
The British Australian (and) New Zealand Antarctic Research Expedition (BANZARE) was a research expedition into Antarctica between 1929 and 1931, involving two voyages over consecutive Austral summers. It was a British Commonwealth initiative, driven more by geopolitics than science, and funded by the United Kingdom, Australia and New Zealand.
The Australasian Antarctic Expedition was a 1911–1914 expedition headed by Douglas Mawson that explored the largely uncharted Antarctic coast due south of Australia. Mawson had been inspired to lead his own venture by his experiences on Ernest Shackleton's Nimrod expedition in 1907–1909. During its time in Antarctica, the expedition's sledging parties covered around 4,180 kilometres (2,600 mi) of unexplored territory, while its ship, SY Aurora, navigated 2,900 kilometres (1,800 mi) of unmapped coastline. Scientific activities included meteorological measurements, magnetic observations, an expansive oceanographic program, and the collection of many biological and geological samples, including the discovery of the first meteorite found in Antarctica. The expedition was the first to establish and maintain wireless contact between Antarctica and Australia. Another planned innovation – the use of an aircraft – was thwarted by an accident before the expedition sailed. The plane's fuselage was adapted to form a motorised sledge or "air-tractor", but it proved to be of very limited usefulness.
Ian Rutherford Plimer is an Australian geologist and professor emeritus at the University of Melbourne. He rejects the scientific consensus on climate change. He has been criticised by climate scientists for misinterpreting data and spreading misinformation.
Cecil Thomas Madigan was an Australian explorer and geologist, academic, aerial surveyor, meteorologist, author and officer of the British army. He was born in Renmark, South Australia. His family had associations with William Benjamin Chaffey.
Robert Merlin Carter was an English palaeontologist, stratigrapher and marine geologist. He was professor and head of the School of Earth Sciences at James Cook University in Australia from 1981 to 1998, and was prominent in promoting anthropogenic climate change denial.
The geology of Antarctica covers the geological development of the continent through the Archean, Proterozoic and Phanerozoic eons.
The Heroic Age of Antarctic Exploration was an era in the exploration of the continent of Antarctica which began at the end of the 19th century, and ended after the First World War; the Shackleton–Rowett Expedition of 1921–1922 is often cited by historians as the dividing line between the "Heroic" and "Mechanical" ages.
Professor Dame Jane Elizabeth Francis, is the Director of the British Antarctic Survey. She previously worked as Professor of Palaeoclimatology at the University of Leeds where she also was Dean of the Faculty of Environment. In 2002 she was the fourth woman to receive the Polar Medal for outstanding contribution to British polar research. She is currently the Chancellor of the University of Leeds.
Antarctica is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest continent, being about 40% larger than Europe, and has an area of 14,200,000 km2 (5,500,000 sq mi). Most of Antarctica is covered by the Antarctic ice sheet, with an average thickness of 1.9 km (1.2 mi).
The Marinoan glaciation, sometimes also known as the Varanger glaciation, was a period of worldwide glaciation. Its beginning is poorly constrained, but occurred no earlier than 654.5 Ma. It ended approximately 632.3 ± 5.9 Ma during the Cryogenian period. This glaciation possibly covered the entire planet, in an event called the Snowball Earth. The end of the glaciation was caused by volcanic release of carbon dioxide and dissolution of gas hydrates and might have been hastened by the release of methane from equatorial permafrost.
The air-tractor sledge was a converted fixed-wing aircraft taken on the 1911–1914 Australasian Antarctic Expedition, the first plane to be taken to the Antarctic.
The Sturtian glaciation was a worldwide glaciation during the Cryogenian Period when the Earth experienced repeated large-scale glaciations. As of January 2023, the Sturtian glaciation is thought to have lasted from c. 717 Ma to c. 660 Ma, a time span of approximately 57 million years. It is hypothesised to have been a Snowball Earth event, or contrastingly multiple regional glaciations, and is the longest and most severe known glacial event preserved in the geologic record, after the much earlier Huronian glaciation.
John J. Chambers Crowell was an American professor of geology, known for his research in tectonics, sedimentation, and the geology of California, especially his studies of the San Andreas Fault.
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