Biostratigraphic implications of the first Eocene land-mammal fauna from the North American coastal plain

Journal Article · Tue Nov 01 04:00:00 EST 1988 · Geology; (USA)

DOI:https://doi.org/10.1130/0091-7613(1988)016<0995:BIOTFE>2.3.CO;2· OSTI ID:7160508

Westgate, J W ^[1]

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1. Univ. of Texas, Austin (USA)

A newly discovered vertebrate fossil assemblage, the Casa Blanca local fauna, comes from the Laredo Formation, Claiborne Group, of Webb County, Texas, and is the first reported Eocene land-mammal fauna from the coastal plain of North America. The mammalian fauna is correlated with the Serendipity and Canderlaria local faunas of west Texas, the Uinta C faunas of the Rocky Mountains, the Santiago Formation local fauna of southern California, and the Swift Current Creek local fauna of Saskatchewan, The vertebrate-bearing deposit lies about 32 m above a horizon containing the marine gastropod Turritella cortezi, which ranges from east Texas to northeast Mexico in the lower half of the Cook Mountain and Laredo Formations and is a guide fossil to the Hurricane Lentil in the Cook Mountain Formation. Nannoplankton found in these middle Eocene formations belong to the upper half of Nannoplankton Zone 16 and allow correlation with European beds of late Lutetian to early Bartonian age.

• OSTI ID: 7160508
• Journal Information: Geology; (USA), Journal Name: Geology; (USA) Vol. 16:11; ISSN GLGYB; ISSN 0091-7613
• Country of Publication: United States
• Language: English

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