The Waldron locality of the Niagara group, which has proved so prolific in species, and so abundant in the individuals of nearly all of them, was discovered in 1860 by Prof. David Christy, of Cincinnati, and the information was communicated to Professor James Hall in the Autumn of that year. The Silurian seabed was generally shallow and the bottom extremely uneven. In Indiana these shale beds were probably deposited in a wide depression of the ocean bed, similar to that of Western New York, while to the northward the area was a more shallow sea. We have a less accurate knowledge of the physical conditions prevailing to the south and southwest of the region described; but it would appear, from what we know of the distribution of the fossils, that there were similar areas of depression with a most abundant fauna, while the intermediate shallower areas are marked by the presence of calcareous deposits, with a moderate development of a somewhat distinct fauna featuring coral, crinoids, and brachiopods.

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Name:  Periechocrinites whitfieldi crinoid and Platyostoma plebium gastropod

Geologic Age: Silurian
Stratigraphic detail:  Waldron Shale
Location:  Shelby County, IN
Comments:  Here is a beautiful combination display piece of a rare crinoid, Periechocrinites whitfieldi associated with a number of killer gastropods, Platyostoma plebium, from the Waldron Shale Formation of Indiana. This piece was professionally prepared under a microscope using an air abrasive unit to allow the natural detail to be exposed. The are two rare crinoids, seven gastropods, a root system of a Lyriocrinus crinoid, and a number of brachiopods and other Waldron fauna. The crinoids measure 1" each and the largest gastropod measures 1 1/2" wide. This is a killer piece that would make a great display piece.

 

Crinoid/Gastropod - Price $115.00

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Name:  Dimerocrinites occidentalis

Geologic Age: Silurian
Stratigraphic detail:  Waldron Shale
Location:  Shelby County, IN
Comments:  Here is a very rare crinoid from the famous Waldron Shale Formation of Indiana. This crinoid was recently acquired from a major crinoid collector from the United States. This crinoid is fossilized in an unusual starburst pattern showing the arms and pinnules splayed out. Most of the arms and pinnules have started to disarticulate, but is still a very showy specimen and extremely rare. Don't pass this one up as these don't come around very often and priced to sell.

 

Dimerocrinites - Price $75.00

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