The Virgelle Sandstone is a geologic formation overlain by the Two Medicine Formation.[1] It formed from the beach sands exposed on northern and western shores of the receding Colorado Sea.[1]

Footnotes

  1. ^ a b "Geological Setting," Trexler (2001); pages 300-301.

References

  • Trexler, D., 2001, Two Medicine Formation, Montana: geology and fauna: In: Mesozoic Vertebrate Life, edited by Tanke, D. H., and Carpenter, K., Indiana University Press, pp. 298–309.
Allikas: https://en.wikipedia.org/wiki/Virgelle_Sandstone
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