Sunday, June 21, 2020

Clathrospira subconica gastropod from the Marble Hill Bed.

Clathrospira subconica is another common gastropod fossil that is found in the Marble Hill Bed. It is not nearly as common as Paupospira bowdeni but good examples are not hard to find.  This is another high spired, conispiraled gastropod but it is shorter and fatter than Paupospira bowdeni. The shell opening is triangular in shape and this results in a somewhat sharp edge to each spiral.

Specimen #1

Specimen #2

The "Marble Hill Bed" is part of the Rowland Member of the Drakes formation (equivalent the Whitewater formation in Ohio and Indiana). It is upper Ordovician in age, Katian (Richmondian) stage (450-445 mya) and located near Carrollton, KY. I collected these fossils in July of 2016.

No comments:

Post a Comment