Thick, appears to be broken at the narrower end.

Black obsidian, side-notched point with concave base. K. Peterson 1/20/98

Black obsidian biface. D. Bradley 02/07/99

Black obsidian drill fragment. M. Christopher 10/26/98.

Black obsidian leaf-shaped biface. M.Christopher 10/09/98.

Black obsidian biface. There is an adhering matrix on one side. SWD 9/26/1999

Bifacially flaked obsidian tool that is heavily retouched along edges almost to a 45 degree angle. The cross-section is quadrilateral and 1.3 cm. thick. R.Williams 5/13/98

Obsidian side-notched point, with expanding stem and parallel flaking.

Black obsidian side-notched point with a flat base. M. Christopher 10/23/1998. Dr. Dennis Jenkins, University of Oregon, sent this specimen to Northwest Research Obsidian Studies Laboratory, Corvalis, OR for analysis (on loan 11/30/98 - 4/9/99). A portion of this specimen was removed for obsidian hydration. The source of raw material was determined to be Cougar Mountain. Northwest Research Obsidian Lab placed a paper tag in the specimen bag with the following information: [Lab Contract #] BO-98-91 [Catalog #1989-57/35-M-] 100 [Collection Name] Bergen [Analysis] Specimen No: 45 [Source Location] Cougar Mountain See also the following report from Northwest Research Obsidian Studies Lab for more detailed analytical data: Skinner, Craig E. and Jennifer J. Thatcher 1998 "X-ray Fluoresence Analysis of Artifact Obsidian from the Bergen Site, Fort Rock Lake Basin, Lake County, Oregon." Northwest Research Obsidian Studies Laboratory, Report 98-91, Corvalis OR. Dr. Jenkins' interpretation of the data was reported at the Northwest Anthropological Conference, 4/8/99 - 4/10/99 in his paper entitled, "Obsidian Characterization and Hydration Results of the Fort Rock Basin Prehistory Project." D. Bradley 04/12/99.

Black obsidian, corner-notched point with concave base. Tip is broken. D. Bradley 02/10/99