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Showing results for tags 'kaibab'.
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This was found among one of the large chert layers in the permian Kaibab Limestone. The sponge, Actinocoelia, is very common in this layer but this seems different or is at least a different presentation or segment of it. It's nearly perfectly round. It's diameter is 3 1/2 cm.
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- kaibab
- nautiloids
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A common silicified sponge from Permian Kaibab Limestone. Index sponge for Kungarian/Leonardian Age rocks from the western US. Reference: http://geology.byu.edu/home/sites/default/files/actinocoelia-maeandrina-finks-from-the-kaibab-limestone-of-northern-arizona-leland-r.-griffin.pdf
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- actinocoelia maeandrina
- arizona
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