CAORA 1091, Orange Co., California. Davis, O.K., 1990.
Abstract
Tilia II ASCII file caora1029.txt
Tilia II ASCII file caora1089.txt
Tilia II ASCII file caora1091.txt



Davis, O.K. 1990.
Pollen analysis of archeological sites. pp. J1 - J37 IN de Barros, P. and Koerper, H.C. (editors) "Final test investigation report and request for determination of eligibility for 23 sites along the San Joaquin Hills transportation Corridor." Report by the Chambers Group, Inc., to Transportation Corridor Agencies, Costa Mesa, California.

Small, deep shelter, with shell midden, prickley pear (Opuntia) abundant, rodent disturbance evident at depth. Ten m southwest of CA-Ora-1089.

The pollen concentration is high in the upper samples but decreases with depth, indicating progressive deterioration. Paradoxically, the percentages of deteriorated pollen is highest in the upper samples. Although Sporormiella spores are present in the lowest sample (indicating some mixing), other historic indicators (Erodium cf. cicutarium, and Thecaphora) are limited to the top sample. The sharp decrease in Liguliflorae pollen above 30 cm also indicates that mixing has been limited. As at nearby CA-Ora-1089, Artemisia pollen percentages increase dramatically in the surface sample. Perhaps the historic horizon (200 years ago) can be placed at 20 - 30 cm.

It is interesting that no Opuntia pollen was encountered even though the plant is mentioned in the site report.

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