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A note on the distribution of selected groups of Upper Cretaceous forminiferida and their value as environmental indicators
McGee, David C.
A comparison of the faunal characteristics of two foraminiferal assemblages from the Rosario Formation in Baja California suggests the following general criteria which may prove to be useful in the interpretation of Upper Cretaceous paleoenvironments: 1) specific groups of arenaceous foraminifers characterize relatively deep-water assemblages, 2) arenaceous foraminifers constitute the greatest percentage of tests in relatively deep-water assemblages, 3) specimens of Bulimina are not abundant in relatively shallow-water assemblages, and 4) attached foraminifers are most abundant in relatively shallow-water faunas. Sixty species and subspecies of benthonic forminifera are recorded from the two faunules; only six were common to both faunules.
San Diego State University
Bachelor of Science (B.S.) San Diego State University, 1966
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