Santa Rosae

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The northern four Channel Islands of California are shown here in dark green Californian Channel Islands map en.png
The northern four Channel Islands of California are shown here in dark green

Santa Rosae (also spelled Santarosae) was, before the end of the last ice age, [1] an ancient landmass off the coast of present-day southern California, near Santa Barbara County and Ventura County, of which the northern Channel Islands of California are remnants. At its largest, Santa Rosae was roughly 3-4 times bigger than the northern Channel Islands of today, nearly 125 km (77.67 miles) long from east to west. Between about 20,000 and 5,000 years ago, Santa Rosae lost about 70% of its land mass to post-glacial rising sea level, leaving behind a vast submerged landscape currently being explored by scientists. San Miguel, Santa Rosa, Santa Cruz, and Anacapa Island comprise the unsubmerged portions of Santa Rosae today. This island was about 5 miles offshore. It broke up between about 11,000 and 9,000 years ago, and the present northern Channel Islands took their shape after the continental ice sheets melted and sea levels rose by about 100 meters.

There is evidence to suggest that a now-submerged island, Calafia, lay between Santa Rosae and the mainland. [2]

Santa Rosae had a population of pygmy mammoths (Mammuthus exilis), which became extinct roughly 13,000 years ago.

On Santa Rosa Island was found the ~13,000-year-old skeleton of Arlington Springs Man, among the oldest human remains yet found in North America. As Santa Rosae was not connected to the mainland at the time, this shows that Paleo-indians settled the island using boats. Archaeological evidence shows that these Paleocoastal peoples had sophisticated maritime technologies and fished, hunted marine mammals and birds, and harvested island plant foods [3] These Paleocoastal peoples, who survived on the island until about 8,000 years ago, may be the ancestors of the Island Chumash tribe, who lived on the northern Channel Islands for millennia until Spanish authorities removed them to mainland missions in the 1820s. [4]

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Chumash people Native American tribe of California

The Chumash are a Native American people who historically inhabited the central and southern coastal regions of California, in portions of what is now San Luis Obispo, Santa Barbara, Ventura and Los Angeles counties, extending from Morro Bay in the north to Malibu in the south. They also occupied three of the Channel Islands: Santa Cruz, Santa Rosa, and San Miguel; the smaller island of Anacapa was likely inhabited seasonally due to the lack of a consistent water source.

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Channel Islands National Park national park of the United States

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Santa Cruz Island island in the United States of America

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Santa Barbara Island island in the United States of America

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Jon M. Erlandson is an archaeologist and Philip H. Knight Professor of Social Sciences in the Department of Anthropology at the University of Oregon, and the director of the University of Oregon Museum of Natural and Cultural History. Erlandson’s research interests include coastal adaptations, the peopling of North America, maritime archaeology and historical ecology and human impacts in coastal ecosystems.

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The skull and bones of a man buried between 9,800 and 10,200 years ago on San Miguel Island, in California's Channel Islands, were exposed by beach erosion and discovered and preserved in 2005 by University of Oregon archaeologists. The remains were dated by way of radiocarbon dating and evaluation of artifacts which had been intentionally buried with him. They were analyzed, but it was not possible to extract the Tuqan Man's DNA, though increasingly better testing techniques and methods became available and were utilized over the 12 years that passed after his original discovery. The remains were studied before their return to the island, which was delayed by resolution of tribal identification and ownership issues contingent on resolution of the precedent-setting Kennewick Man case from Washington State. Analysis of the bones indicated that he was in his forties when he died, and had spent time some distance east of what is now the Santa Barbara coastal region. Under procedures in accordance with the Native American Graves Protection and Repatriation Act (NAGPRA), in May, 2018, they were restored to the claiming Chumash tribe, for reburial on the island. The Chumash people had long occupied the island before the arrival of the first European explorers, and the find was given the place name of the island in the Chumash language.

References

  1. Santarosae Island. Retrieved September 18, 2016.
  2. Brown, Gail (November 19, 2001). "Geologist Names Submerged Island 'Calafia'". 93106: The Faculty & Staff Newsletter. UC Santa Barbara. 12 (5): 1. Retrieved 2020-01-07.
  3. Erlandson, J.M., T.C. Rick, T.J. Braje, M. Casperson, B. Culleton, B. Fulfrost, T. Garcia, D. Guthrie, N. Jew, D. Kennett, M.L. Moss, L.. Reeder, C. Skinner, J. Watts, & L. Willis. 2011. Paleoindian seafaring, maritime technologies, and coastal foraging on California’s Channel Islands. Science 441:1181-1185.
  4. Braje, T.J., J.G. Costello, J.M. Erlandson, M.A. Glassow, J.R. Johnson, D.P. Morris, J.E. Perry, & T.C. Rick. 2010. Channel Islands National Park Archaeological Overview and Assessment (M. Glassow, editor). National Park Service, digital volume.

Coordinates: 34°00′N120°00′W / 34.000°N 120.000°W / 34.000; -120.000