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Geology and Economic Deposits of East Central Utah, Seventh Annual Field Conference, 1956
Early Tertiary Ostracode Zones of Uinta Basin
F. M. Swain
Six ostracode zones are recognized in the early Tertiary of the Uinta Basin, Utah-Colorado, as follows: 1. Cyprois, n, sp. zone, upper Colton and Colton-Green River transition beds; 2. Cypridca bisulcata zone, lower Green River and Colton-Green River transition beds; 3. Cypris pagei zone, lower Green River; 4. Cyprois marginata zone, middle Green River; 5. Lower Heterocypris zone, middle Green River; 6. Barren zone, middle and upper Green River; and 7. Upper Heterocypris zone, upper Green River and lower Uinta.
The zones are described and brief descriptions of the ostracode species are given.
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