AMS RADIOCARBON DATES ON
TYPE G1 AND K1 OLIVELLA SHELL BEADS
CARMEL VALLEY, MONTEREY COUNTY, CALIFORNIA
Gary S. Breschini and Trudy Haversat
August 11, 2001
A two-unit excavation at CA-MNT-1701, in the hills south of the Carmel Valley, produced 23 radiocarbon dates. Of these, 3 were obtained on Type G1 and K1 Olivella shell beads.
The beads are illustrated below.
Figure 1. Olivella Shell Beads from CA-MNT-1701 (front and back sides).
Radiocarbon DatesThe AMS radiocarbon dates obtained from these beads are listed in Table 1, below.
Table 1. Radiocarbon Dates from Olivella Shell Beads from CA-MNT-1701
(Delta-R = 225 ± 35).
Meas. age Lab. No. Material Provenience C13 Int. 2 sigma cal. 850 ± 50 Beta-156476 Shell-Olivella G1 Unit 1, 80-90 cm (#1701-066) 0.7 AD 1320 AD 1250-1430 890 ± 40 Beta-156474 Shell-Olivella K1 Unit 2, 20-30 cm #1701-090 0.3 AD 1300 AD 1240-1400 1370 ± 40 Beta-156475 Shell-Olivella G1 Unit 2, 10-20 cm (#1701-083) 1.3 AD 800 AD 700-920
Eighteen additional radiocarbon dates on shell, all from Unit 1, range between 760 and 1390 (measured age). Two additional dates, obtained from charcoal, also fall within this range.
The dates on G1 beads supplement two previous dates which we and Randy Milliken obtained from CA-MNT-234, at Moss Landing.
ReferencesGifford, E.W. 1947. Californian Shell Artifacts. University of California Anthropological Records 9(1):1-114.
Hughes, Richard E., ed. 1994. Toward a New Taxonomic Framework for Central California Archaeology: Essays by James A. Bennyhoff and David A. Fredrickson. Contributions of the University of California Archaeological Research Facility 52.
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