From abstract: This report describes four species of Ostreidae from the Upper Cretaceous of the Gulf region. The zones that the species characterize lie either in the upper part of the Austin chalk or in beds of upper Austin age.
Physical Description
iv, 312 p. : ill., plates, maps (some color, some folded) ; 28 cm.
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Added Title:
United States Geological Survey Professional Paper 186
Description
From abstract: This report describes four species of Ostreidae from the Upper Cretaceous of the Gulf region. The zones that the species characterize lie either in the upper part of the Austin chalk or in beds of upper Austin age.
Physical Description
iv, 312 p. : ill., plates, maps (some color, some folded) ; 28 cm.
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