File:My Public Lands Roadtrip- Rimrock Draw Rockshelter in Oregon (19022766978).jpg
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editDescriptionMy Public Lands Roadtrip- Rimrock Draw Rockshelter in Oregon (19022766978).jpg |
Near the Rimrock Draw Rockshelter outside of Riley, Oregon, archaeologists recently discovered evidence suggesting one of the oldest known human occupations in the western U.S. With assistance from local students, archaeologists with the BLM and the University of Oregon Archaeological Field School have been excavating at the Rimrock Draw Rockshelter since 2011. Their discoveries have included a number of stone projectile points and tooth enamel fragments likely belonging to a prehistoric camel that became extinct approximately 13,000 years ago. But what has the archaeological community most excited is a small stone tool found below a layer of volcanic ash. Near the bottom of a 12-foot deposit, archaeologists discovered a layer of ash that was identified as volcanic ash from a Mt. St. Helens eruption about 15,800 years ago. Beneath the layer of volcanic ash, archaeologists discovered a small orange agate tool believed to have been used for scraping animal hides, butchering, and possibly carving wood. A blood residue analysis of the tool revealed animal proteins consistent with bison, the most likely species being Bison antiquus, an extinct ancestor of the modern buffalo. “The discovery of this tool below a layer of undisturbed ash that dates to 15,800 years old means that this tool is likely more than 15,800 years old, which would suggest the oldest human occupation west of the Rockies,” said BLM Burns District Archaeologist Scott Thomas. |
Date | |
Source | My Public Lands Roadtrip: Rimrock Draw Rockshelter in Oregon |
Author | Bureau of Land Management |
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This image was originally posted to Flickr by mypubliclands at https://flickr.com/photos/91981596@N06/19022766978. It was reviewed on 5 August 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
5 August 2015
Public domainPublic domainfalsefalse |
This image is a work of a Bureau of Land Management* employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain in the United States. *or predecessor organization |
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current | 18:30, 4 August 2015 | 2,400 × 1,085 (2 MB) | Wilfredor (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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ISO speed rating | 200 |
Date and time of data generation | 22:26, 13 November 2012 |
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File change date and time | 13:07, 4 March 2015 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 22:26, 13 November 2012 |
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Date metadata was last modified | 05:07, 4 March 2015 |
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IIM version | 68 |