Microfossil of the oil shale of the Green River formation: Pollen similar to that of Thuja. Colorado or Utah. 1925.
Dates
Date Taken
1925
Summary
Microfossil of the oil shale of the Green River formation: Pollen similar to that of Thuja. Colorado or Utah. 1925. Plate 24, figure 3, U.S. Geological Survey. Professional paper 168. 1931.
Summary
Microfossil of the oil shale of the Green River formation: Pollen similar to that of Thuja. Colorado or Utah. 1925. Plate 24, figure 3, U.S. Geological Survey. Professional paper 168. 1931.
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