Sunday, November 28, 2010

Dalmanites Imprint


Imprint of a Dalmanites trilobite in a piece of Waldron Shale from Clark County, Indiana.  This trilobite crawled the Earth during the Middle Silurian Period (about 428,000,000 to 418,000,000 years ago).



Saturday, November 27, 2010

Two Meristella maria Brachiopods


Imprint remains of fossilized brachiopods called Meristella maria [the genus Meristina can also be used].  These animals lived in the Middle Silurian Period.  Fossils found in the Waldron Shale of  Clark County, Indiana.




Pictures of second specimen.




Friday, November 26, 2010

Pyrite Coated Brachiopod + Crinoid

Picture of a Silurian Period brachiopod and crinoid stem coated in pyrite.  I am guessing this would be a concretion?  Fossils found in the Laurel Dolomite of Nelson County, Kentucky.

 Next picture shows the gray dolomite on the other side of the pyrite concretion.