Specimens of Fossiliferous Limestone Varves, collected from Wyoming, USA. Varves are alternating sedimentary sequences, associated with lacustrine deposits and seasonal cycles of temperature changes. These specimens display faint varves (lighter and darker bands) down the edges of each piece. These specimens may also contain partial fish remains and are an example of Lagerstätten. This is a German term that refers to a sedimentary layer with unusual occurrences of fossils that have undergone relatively high grade preservation. These specimens are Eocene in age and part of the Green River formation. Specimens are available in multiple sizes and come in a white card tray with an information label.
