Wednesday, January 15, 2014

Favosites arbuscula coral from the Windom shale

I recently found a couple of coral specimens in the Windom shale that I've only recently come to recognize. It's Favosites arbuscula and is recognizable by the elongated style of colony that often forms "fingers" or bush like shapes (arbuscula comes from Latin and one definition is of "bush").

Specimen #1

Specimen #2
This specimen is narrow in cross section and has broken to show how the individual corralites grew in life.

Both specimens were found along the shore line of Lake Erie and likely came from the Wanakah Shale, Ludlowville Fm. (Devonian, Givetian stage).

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