Calico Mountains Archeological District | |
Nearest city | Yermo, California |
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Coordinates | 34°56′53″N116°45′41″W / 34.94814068°N 116.76133173°W |
Area | 100.5 acres (40.7 ha) |
NRHP reference No. | 73000430 [1] |
Added to NRHP | March 30, 1973 |
The Calico Early Man Site is an archaeological site in an ancient Pleistocene lake located near Barstow in San Bernardino County in the central Mojave Desert of Southern California. This site is on and in late middle-Pleistocene fanglomerates (now-cemented alluvial debris flow deposits) known variously as the Calico Hills, the Yermo Hills, or the Yermo formation. Holocene evidence includes petroglyphs and trail segments that are probably related to outcrops of local high-quality siliceous rock (primarily chalcedony in freshwater limestone).
The Calico Early Man Site includes:
The tools and flakes of LMLI and those found in the nested inset known as the Rock Wren Locality were probably made by modern man (Homo sapiens sapiens).
The stone tools of these industries, along with preforms, lithic core, technical flakes, and pieces of angular debitage, mainly of chalcedony, are found on and in late middle Pleistocene-age fanglomerates and younger inset alluvial terraces in the Calico Hills (also known as the Yermo Hills) east of the Calico Peaks and the Calico Mountains. The location is in the central portion of southern California's Mojave Desert. Historically, this archaeological project has also been known as "The Calico Mountains Archaeological Site" and "The Calico Hills Archaeological Site". Today, it is called "The Calico Early Man Site". [2]
In most of the Great Basin region, Late Pleistocene and Holocene alluviation has effectively buried and sealed earlier Pleistocene sediments and possible evidence of pre-Clovis cultures. In the Manix Basin (Lower Mojave Valley) of San Bernardino County, California a fortuitous ensemble of environmental factors relating to mountain building, climatically controlled conditions for lake formation, alluviation, and erosion, faulting and folding and significant erosion of ancient lacustrine plain sediments by the modern drainage have rendered relatively accessible for archaeological investigation a series of deposits that represent more than 350,000 years of Quaternary history.
The Manix Basin, a structural basin in the central Mojave Desert, is the third and lowest major valley of the Mojave River, presently an exotic stream with episodic flow, which has its source in the San Bernardino Mountains, some 200 km (120 mi) to the southeast.
A freshwater lake developed in the basin about 400,000 – 500,000 years ago near the Calico Archaeological Site. The lake was present until the late Pleistocene. The last high stand of Lake Manix was at 543 m (1,781 ft) and had a surface area of approximately 236 km2 (91 sq mi). This lake drained, probably catastrophically, approximately 18,100 years ago, probably as a result of a major increase in river inflow or tectonic movement on the Manix fault. [3]
The lacustrine, fluvial, and alluvial sediments of the Pleistocene Manix Formation contain remains of numerous Rancholabrean animals ranging in age from approximately 20,000 years to well in excess of 350,000 years before present. [3] Fossils recovered from the section include: camel, horse, mammoth, saber-tooth cat, dire wolf, short-faced bear, coyote, flamingo, pelican, eagle, swan, geese, mallard duck, ruddy duck, canvas backed duck, double-crested cormorant, grebe, crane, seagull and stork. [3]
Thousands of rocks that bear a strong resemblance to prehistoric tools have been found at the site, both on the surface, and up to 8 m (26 ft) below the surface. A stone from the Master Pit had been dated to over 200,000 BP. This date could have been the result of contamination from other elements in the soil, so currently there is an effort to date verified lithics through thermoluminescence dating. While the results are still pending, the styles suggest 20,000 to 30,000 BP.
The debate centers on whether the "tools" were made by humans (i.e., artifacts), or through typical geological processes (i.e. geofacts). The general scientific consensus is that the subsurface items are geofacts. [4]
The artifactual character of the Calico lithic assemblage has been questioned (Haynes 1973; Payen 1982a, 1982b; Taylor and Payen 1979; Duvall and Venner 1979). Haynes (1973) postulated that rock fracturing by tectonic stresses, weather, rock-on-rock percussion in streams and mudflows, pressure retouch of buried cobbles, and successive generations of flake removal and separation from cores through cycles of erosion and redeposition could have occurred during deposition of the alluvial deposits at Calico and produced specimens indistinguishable from artifacts.
Specimens collected from earlier excavations up to the present are under analysis by archaeologists volunteering at the Calico site. Many have been confirmed to be geofacts, but some are believed to be potential artifacts and have been cataloged and submitted for thermoluminescent dating. Currently[ when? ] work is being done on compiling and publishing the most recent finds at the site to be submitted to the local tribes, community and journals for peer review.
Payen (1982) studied flake scar angles as traits for distinguishing artifacts from geofacts. He tested a method developed by Barnes (1939) who had compared frequency of obtuse angles on eoliths, natural fractures, and artifacts. Barnes found obtuse angles on 72% of eoliths, 75% of natural fractures, and 18% of artifacts and concluded that “The flaked tools of an industry…may be considered to be of human origin if not more than 25% of the angles scar-platform are obtuse (90° and over)” (Barnes 1939:111). Payen measured all flake angles on each Calico specimen in his sample. It is conceivable that flake scars were confused for striking platforms. Flaking from one side of a specimen can often remove earlier platform areas on the other side. Angles between two flake scars are different from angles between platforms and derivative flake scars.
Payen compared mean angle values for Calico specimens with those on specimens selected as representing controlled and uncontrolled fracture. He found that “Statistically, there is no significant difference between the sample of alleged tools and the uncontrolled fracture series.” (Payen 1982:200).
Duvall and Venner (1979:462) examined a sample of Calico artifacts and concluded they were form-selected examples of naturally flaked rocks. Their assessment was based on variances in seven attributes (length, width, thickness, flake angle, medial axis angle, lateral edge angle, and distal edge angle) and comparison with comparable attributes on specimens in eight Paleoindian collections reported by Wilmsen (1970).
Both the Duvall/Venner and the Payen papers have been criticized on a number of levels, and analyses supporting the pro-artifact argument have been published. [5] The present consensus is that there is no evidence of human activity at the Calico Early Man site. This consensus developed based on a number of factors, including:
In 1959 Louis Leakey, while at the British Museum of Natural History in London, received a visit from Ruth DeEtte Simpson, an archaeologist from California. Simpson had acquired what looked like ancient scrapers from a site in the Calico Hills and showed it to Leakey.
Leakey viewed it as important to study the Calico Hills site, [7] as he was convinced that the number and distribution of native languages in the Americas required more time than 12,000 years to evolve and acquire their current distribution. [8] In 1963, Leakey obtained funds from the National Geographic Society and commenced archaeological excavations with Simpson. Excavations in an area stratigraphically separate from a verified 10,000-year-old Paleoindian site were carried out by Leakey and Simpson, who believed that they had located stone artifacts that were dated 100,000 years or older, suggesting a human presence in North America much earlier than estimated. [9]
The archaeologist Jeffrey Goodman who worked at the site with Leakey had also claimed the stone artifacts to be human made. Goodman has also made controversial statements that the artifacts found at Calico Hills may be as old as 500,000 years and if proven would be the oldest human artifacts in the world, which would place human origins in the Americas. [10] However, the majority of scientists have rejected these claims. According to Kenneth Feder, "Goodman's claims were not backed up with even a shred of evidence." [11]
The geologist Vance Haynes had made three visits to the site in 1973 and had claimed that the artifacts of Leakey were naturally formed geofacts. According to Haynes, the geofacts were formed by stones becoming fractured in an ancient river on the site. [12]
In her autobiography, Louis' wife Mary Leakey wrote that because of his involvement with the Calico Hills site she had lost academic respect for him, and that the Calico excavations was "catastrophic to his professional career and was largely responsible for the parting of our ways". [13] She did not share his visionary views about the Calico site. She regarded Louis as often slipping into incompetence and often publicized that opinion. [7] Louis Leakey continued to visit the site several times a year and was connected with the project until his death in 1972. The site was taken over by the Bureau of Land Management and was opened to the public. [14]
The Olduvai Gorge or Oldupai Gorge in Tanzania is one of the most important paleoanthropological localities in the world; the many sites exposed by the gorge have proven invaluable in furthering understanding of early human evolution. A steep-sided ravine in the Great Rift Valley that stretches across East Africa, it is about 48 km long, and is located in the eastern Serengeti Plains within the Ngorongoro Conservation Area in the Olbalbal ward located in Ngorongoro District of Arusha Region, about 45 kilometres from Laetoli, another important archaeological locality of early human occupation. The British/Kenyan paleoanthropologist-archeologist team of Mary and Louis Leakey established excavation and research programs at Olduvai Gorge that achieved great advances in human knowledge. The site is registered as one of the National Historic Sites of Tanzania.
The Oldowan was a widespread stone tool archaeological industry (style) in prehistory. These early tools were simple, usually made by chipping one, or a few, flakes off a stone using another stone. Oldowan tools were used during the Lower Paleolithic period, 2.9 million years ago up until at least 1.7 million years ago (Ma), by ancient Hominins across much of Africa. This technological industry was followed by the more sophisticated Acheulean industry.
An artifact or artefact is a general term for an item made or given shape by humans, such as a tool or a work of art, especially an object of archaeological interest. In archaeology, the word has become a term of particular nuance; it is defined as an object recovered by archaeological endeavor, including cultural artifacts.
Clovis points are the characteristically fluted projectile points associated with the New World Clovis culture, a prehistoric Paleo-American culture. They are present in dense concentrations across much of North America and they are largely restricted to the north of South America. There are slight differences in points found in the Eastern United States bringing them to sometimes be called "Clovis-like". Clovis points date to the Early Paleoindian period, with all known points dating from roughly 13,400–12,700 years ago. As an example, Clovis remains at the Murry Springs Site date to around 12,900 calendar years ago. Clovis fluted points are named after the city of Clovis, New Mexico, where examples were first found in 1929 by Ridgely Whiteman.
In archaeology, lithic technology includes a broad array of techniques used to produce usable tools from various types of stone. The earliest stone tools to date have been found at the site of Lomekwi 3 (LOM3) in Kenya and they have been dated to around 3.3 million years ago. The archaeological record of lithic technology is divided into three major time periods: the Paleolithic, Mesolithic, and Neolithic. Not all cultures in all parts of the world exhibit the same pattern of lithic technological development, and stone tool technology continues to be used to this day, but these three time periods represent the span of the archaeological record when lithic technology was paramount. By analysing modern stone tool usage within an ethnoarchaeological context, insight into the breadth of factors influencing lithic technologies in general may be studied. See: Stone tool. For example, for the Gamo of Southern Ethiopia, political, environmental, and social factors influence the patterns of technology variation in different subgroups of the Gamo culture; through understanding the relationship between these different factors in a modern context, archaeologists can better understand the ways that these factors could have shaped the technological variation that is present in the archaeological record.
Koobi Fora refers primarily to a region around Koobi Fora Ridge, located on the eastern shore of Lake Turkana in the territory of the nomadic Gabbra people. According to the National Museums of Kenya, the name comes from the Gabbra language:
In the language of the Gabbra people who live near the site, the term Koobi Fora means a place of the commiphora and the source of myrrh...
The Paleo-Arctic Tradition is the name given by archaeologists to the cultural tradition of the earliest well-documented human occupants of the North American Arctic, which date from the period 8000–5000 BC. The tradition covers Alaska, and expands far into the east, west, and the Southwest Yukon Territory of Canada.
In archaeology, debitage is all the material produced during the process of lithic reduction – the production of stone tools and weapons by knapping stone. This assemblage may include the different kinds of lithic flakes and lithic blades, but most often refers to the shatter and production debris, and production rejects.
Kashafrud Basin(کشفرود) is an archaeological site in Iran, known for the Lower Palaeolithic artifacts collected there; these are the oldest-known evidence for human occupation of Iran. Kashafrud includes a cluster of sites which are located 35 km to 85 km southeast of Mashhad, near the Kashfarud River. The French geologist Claude Thibault, in collaboration with the Iranian geologist Ali Ariai, conducted surveys in the Kashfrud basin east of Mashhad in 1974–75, during which 80 stone artifacts were collected from seven open areas.
The Big Eddy Site (23CE426) is an archaeological site located in Cedar County, Missouri, which was first excavated in 1997 and is now threatened due to erosion by the Sac River.
Devil's Lair is a single-chamber cave with a floor area of around 200 m2 (2,200 sq ft) that formed in a Quaternary dune limestone of the Leeuwin–Naturaliste Ridge, 5 km (3.1 mi) from the modern coastline of Western Australia. The stratigraphic sequence in the cave floor deposit consists of 660 cm (260 in) of sandy sediments, with more than 100 distinct layers, intercalated with flowstone and other indurated deposits. Excavations have been made in several areas of the cave floor. Since 1973, excavations have been concentrated in the middle of the cave, where 10 trenches have been dug. Archaeological evidence for intermittent human occupation extends down about 350 cm (140 in) to layer 30, with hearths, bone, and stone artefacts found throughout. The site provides evidence of human habitation of Southwest Australia 50,000 years before the present day.
A geofact is a natural stone formation that is difficult to distinguish from a man-made artifact. Geofacts could be fluvially reworked and be misinterpreted as an artifact, especially when compared to paleolithic artifacts.
Ruth DeEtte Simpson was an American archaeologist and founder of the Archaeological Survey Association of Southern California.
Pedra Furada is an important collection of over 800 archaeological sites in the state of Piauí, Brazil. These include hundreds of rock paintings dating from circa 12,000 years before present. More importantly, charcoal from very ancient fires and stone shards that may be interpreted as tools found at the location were dated from 48,000 to 32,000 years before present, suggesting the possibility of a human presence tens of thousand of years prior to the arrival of the Clovis people in North America.
The Soanian culture is a prehistoric technological culture from the Siwalik Hills, Pakistan. It is named after the Soan Valley in Pakistan.
Lake Manix is a former lake fed by the Mojave River in the Mojave Desert. It lies within San Bernardino County, California. Located close to Barstow, this lake had the shape of a cloverleaf and covered four basins named Coyote, Cady/Manix, Troy and Afton. It covered a surface area of 236 square kilometres (91 sq mi) and reached an altitude of 543 metres (1,781 ft) at highstands, although poorly recognizable shorelines have been found at altitudes of 547–558 metres (1,795–1,831 ft). The lake was fed by increased runoff during the Pleistocene and overflowed into the Lake Mojave basin and from there to Lake Manly in Death Valley, or less likely into the Bristol Lake basin and from there to the Colorado River.
The Coats–Hines–Litchy site is a paleontological site located in Williamson County, Tennessee, in the Southeastern United States. The site was formerly believed to be archaeological, and identified as one of only a very few locations in Eastern North America containing evidence of Paleoindian hunting of late Pleistocene proboscideans. Excavations at the site have yielded portions of four mastodon skeletons, including portions of one previously described as being in direct association with Paleoindian stone tools. The results of excavations have been published in Tennessee Conservationist, and the scholarly journals Current Research in the Pleistocene, Tennessee Archaeology, and Quaternary Science Reviews. The site was listed on the National Register of Historic Places on July 12, 2011.
George Francis Carter was an American professor of geography who taught at Johns Hopkins University and later Texas A&M University. Carter had a background in anthropology and conducted archaeological excavations in Southern California. He is best known for supporting the theories of trans-cultural diffusion and early human settlement of the Americas.
The Gault archaeological site is an extensive, multicomponent site located in Florence, Texas, United States on the Williamson-Bell County line along Buttermilk Creek about 250 meters upstream from the Buttermilk Creek complex. It bears evidence of human habitation for at least 20,000 years, making it one of the few archaeological sites in the Americas at which compelling evidence has been found for human occupation dating to before the appearance of the Clovis culture. Archaeological material covers about 16 hectares with a depth of up to 3 meters in places. About 30 incised stones from the Clovis period engraved with geometric patterns were found there as well as others from periods up to the Early Archaic. Incised bone was also found.
Chiquihuite Cave is a possible Upper Paleolithic archaeological site in the Astillero Mountains, Zacatecas State, in North-Central Mexico. Chiquihuite Cave may be evidence of early human presence in the Western Hemisphere up to 33,000 years ago. It is located 2,740 meters above sea level and about 1 kilometer higher than the valley below. Stones discovered here, thought to be lithic artifacts, have been dated to 26,000 years ago based on more than 50 samples of animal bone and charcoal found in association with these stones. However, there is scholarly debate over whether the stones are truly artifacts, human-made tools that are evidence of human presence, or if they were formed naturally. No evidence of human DNA or hearth have been unearthed.