Eocene California

Morrill C, Koch PL (2002) Elevation or alteration Evaluation of isotopic constraints on paleoaltitudes surrounding the Eocene Green River Basin. Geology 30 151-154 Morrison J (1994) Meteoric water-rock interaction in the lower plate of the Whipple Mountain metamorphic core complex, California. J Metam Geol 12 827-840... 

Axelrod DI (1998a) The Eocene Thunder Mountain flora of central Idaho. Univ California Publ Geol Sci 142 1-61, pi 1-15... 

North and South America. For example, the average composition of the Peninsular Ranges batholith in southern California is essentially identical to that of continental crust (Gromet and Silver, 1987 Silver and Chappell, 1988). Similarly, the average composition of exposed. Eocene... 

Stern R. J. and Bloomer S. H. (1992) Subduction zone infancy examples from the Eocene Izu-Bonin-Mariana and Jurassic California arcs. Geol. Soc. Am. Bull. 104, 1621-1636. 

One well-known example is the Lower Permian Karniowice travertine of Poland, where a rich fossil flora and fauna has been uncovered (Szulc and Cwizewicz, 1989). There is evidence that tufas date back to at least the Tertiary within the Barkly karst area of Queensland, Australia (Carthew et al., 2003b), and they have also been recorded in the Eocene Chadron Formation in South Dakota (Evans, 1999), the middle Miocene Barstow Formation in the Mojave Desert of California, USA (Becker et ah, 2001), and in the Miocene Ries crater basin in Germany (Pache et ah, 2001). 

Chabazite was unknown from sedimentary deposits prior to its discovery by Hay (47) in tuffs and tuffaceous clays at Olduvai Gorge, Tanzania. Since then, authigenic chabazite has been recognized in silicic tuffs from Arizona, California, Nevada, and Wyoming (Table II, Figure 3). Most of the occurrences are in lacustrine rocks of late Cenozoic age. There are no reported occurrences of chabazite in rocks older than Eocene in the United States. Monomineralic beds of chabazite are rare, but extensive and nearly pure beds have been reported from lacustrine... 

Erionite was considered an extremely rare mineral prior to the work of Deffeyes (22, 23) and Regnier (97), who showed it to be a common authigenic zeolite in the altered silicic tuffs of lacustrine deposits in north-central Nevada. Since then, erionite has been recognized in silicic bedded tuffs from many western states (Table II, Figure 3). Erionite, like chabazite, has not been reported from sedimentary rocks older than Eocene. Most occurrences of erionite are in upper Cenozoic lacustrine deposits. Extensive and relatively pure beds of erionite occur in southeastern Oregon, southeastern California, and north-central Nevada. 

MacGinitie, H.D. (1969). The Eocene Green River Flora of Northwestern Colorado and Northeastern Utah. University of California Press, Berkeley, 203 pp. 

McKenna, M.C. (1960). Fossil Mammalia from the Early Wasatchian Four Mile Fauna, Eocene of Northwest Colorado. University of California Press, Berkeley, 130 pp. 

River Thames [146], as compared with the levels in clay deposited in Eocene times, and Klein and Goldberg [147] have reported levels up to 82 ppm mercury in surface sediments off the California coast, the highest values occurring near a sewage outfall. 

In California, sand is mined from sedimentary sandstone formations of early tertiary age (namely Paleocene deposits south of Mission Viejo, in the Trabuco Canyon area of Orange County) and Eocene deposits near lone in Amador County and Oceanside in San Diego County. These deposits are essentially feldspathic sands containing clays and heavy minerals. In most cases, glass sand on the West Coast is recovered only after beneficiation. Oriskany and St. Peter sandstones remain the two major sources of glass sand in the United States. 

Heavy California Boscan California Belridge Beta Bachaquero Ad go Eocene Canyon Hondo Alba Hebron Inglaterra Carpinteria Endicott Atkinso ... 

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