Pliocene (Temporal Keyword)

1-2 (2 Records)

EXAMINATION OF SEDIMENTS FROM B. F. SISK DAM, CENTRAL CALIFORNIA FOR POLLEN, PHYTOLITHS, AND DIATOMS TO IDENTIFY PROBABLE AGE OF THE DEPOSITS (2009)

DOCUMENT Full-Text Linda Scott Cummings. Barbara Winsborough. R.A. Varney.

Five sediment samples collected from B.F. Sisk Dam in central California, approximately 12 km west of Los Banos, were examined to recover pollen, phytoliths, and diatoms. These sediments were recovered from the downstream toe of the dam near the former junction of San Luis and Cottonwood Creeks. These samples are believed to represent the Plio-Pleistocene Tulare Formation and possibly the Corcoran Clay, one of the uppermost units within the Tulare. Analysis was conducted in an effort to verify...

Origin of Cinders in Wupatki National Monument (2001)

DOCUMENT Full-Text Jason A Hooten. Michael H. Ort. Mark D. Elson.

Sunset Crater is the youngest cinder cone in a cluster of Quaternary volcanoes at the northeastern edge of the Pliocene to Holocene (5 Ma to Recent) San Francisco Volcanic Field. Based on dendrochronologyspecifically the recovery of complacent tree-rings on several archaeological specimens from Wupatki Ruin-the eruption of Sunset Crater is dated at A.D. 1064 (Smiley 1958). The eruption may have continued episodically for approximately 100 to 200 years (Amos 1986; Champion 1980; Ulrich et al....