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Palynology ISSN: 0191-6122 (Print) 1558-9188 (Online) Journal homepage: http://www.tandfonline.com/loi/tpal20Eocene palynomorphs from the black diamond mines regional preserve, contra costa county, California Abbas KimyaiTo cite this article: Abbas Kimyai (1993) Eocene palynomorphs from the black diamond mines regional preserve, contra costa county, California, Palynology, 17:1, 101-113, AbstractPalynomorphs from Eocene coaly deposits of the Black Diamond Mines Regional Preserve in California are described. Thirty-two species of spores and pollen are recognized and two of them, Graminidites scabratus and Arecipites antiochus, are regarded as new. The encountered specimens are characterized by 26% spores, 32% gymnosperm pollen, 41% angiosperm pollen, and 1% foraminifers. The climate is considered to be humid and warm. The depositional environment was a coastal brackish-water swamp, and age is regarded to be the Middle Eocene.

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