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Chroococcus, microfossil of the oil shale of the Green River formation.


Date Taken


Album Caption: Oil shale of the Green River formation. Locality O. Specimen a, Box No.II, Slide No.9. Place on the slide, 7/36. Magnification x430. Subject, single two-celled oval or elliptical plant like Chroococcus. Published in U.S. Geological Survey Professional paper 168, Plate 19, figure 8. 1931.


Data Owner :
U.S. Geological Survey
Photographer :
Davis, Charles Albert

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Material Request Instructions

Image located in U.S.Geological Survey Library, Photographic Collection, Davis, C.A. Collection album, Volume 1, No.32.


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Additional Information


Type Scheme Key
name photoLibrary dca00032
number photoLibrary 8925
batch photoLibrary btch281
number_in_book photoLibrary 32

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