San Clemente Island. D. Davis, O.K., 1996.
Tilia II ASCII file sanclem.txt

Davis, O.K. 1996.
Pollen analysis of San Clemente Island archaeological sites. Statistical Research, Inc., Redlands, CA. 11 p.

Routine pollen analysis is reported for 11 sediment samples from 9 archaeological sites on San Clemente Island, western-coastal U.S.A. Pollen preservation is good (1 - 18 % Deteriorated), and the pollen concentration is high (14,000 - 170,000 grains/cm3). All samples are from 10 to 90 cm soil depth, and the sites range from 10 m to 420 m elevation. Although evidence for human activities is clear, the primary difference among these samples is attributed to the sites' environmental setting. The pollen spectra of the low-elevation (10 m) samples are dominated by Chenopodiaceae-Amaranthus pollen, intermediate-elevation (15 - 25 m) samples are dominated by sunflower (Other Compositae) and buckwheat (Eriogonum) pollen, and high-elevation (260 - 420 m) samples are dominated by Liguliflorae and Other Compositae pollen. Low percentages of pine (Pinus), oak (Quercus), ragweed (Ambrosia), Grass (Gramineae), and sagebrush/wormwood (Artemisia) also are present. Evidence for human activity includes high percentages of fungal spores (5 - 149%) and charcoal (37 - 1136%), and the presence of 10.6 % sea-purslane (Sesuvium) - a weed, but the degree of human disturbance of the native vegetation appears to be less than for mainland sites.