Gastropoda indet.
Geological Time: Mississippian (~320 m.y.a.)
Size (25.4mm=1 inch): Fossil 30 mm; Matrix: 65 mm by 45 mm and 65 mm by 55 mm pair
Fossil Site: Heath Shale Formation, Bear Gulch Limestone, Fergus County, Montana
Fossil Code: BGF29
Price: $250.00 - sold
 Description:
The Bear Gulch Limestone is a deposit of some 70 square km in extent
and 30 m in depth that has been a source of one of the most diverse
assemblages of fossil fish with some 110 species having been described
over the past 30 years. Most were new to science, and provided a unique
view of the marine environment of Mississippian times. Fine preservation
of both fish and invertebrates is a hallmark of these deposits, presumably
due to an anoxic depositional environment. This is a most rare specimen
of a fossil gastropod, worthy of a museum collection. As a consequence,
I will offer this one to any academic institution at a substantial
discount from the posted price. |
