Reports of the UNIVERSITY OF CALIFORNIA ARCHAEOLOGICAL SURVEY No. 19 PAPERS ON CALIFORNIA ARCHAEOLOGY: 19-20 Issued January 20, 1953 The University of California Archaeological Survey Department of Anthropology University of California Berkeley 4. California PAPERS IN CALIFORNIA ARCHAEOLOGY: 19-20 C o n t e n t s Page 19. Clement W. Meighan. 20. Robert J. Squier. Preliminary Excavation at the Thomas Site, Marin County............ 1 Appendix: Martin A Baumhoff, Carbonized Basketry from the Thomas S ite ... .....a.a.. . .. a.a *... ...a.................... 9 The Manufacture of Flint Im- plements by the Indians of Northern and Central California...... 15 Appendix: The Terminology and Mineralogy of Chert and Flint........ 33 I 1 1 u s t r a t i o n s Following paE Map 1. Map 2. Plate 1. Plate 2. Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Contour map of Thomas Site (Mrn-115)................. 14 Tribes mentioned in flint-chipping accounts .........POO 15 House ruin in Pit 7, Thomas Site.................... 14 Artifacts from Thomas Site.......................... 14 Cross-sections of Thomas Site....................... 14 Profiles showing internal construction of mound (Mrn-115 ) 0 . . . . . . . . . . ... 0 0 14 Artifacts from Thomas Site ........................ 14 Artifacts from Thomas Site......................... 14 Artifacts from Thomas Site ........................ 14 ge