Natural History - Large Green Fuchsite Specimens

A group of 100 'Desert Rose' crystalline gypsum specimens with sand grain inclusions, mostly of single spheroid form, showing the crystal plate structure to advantage. 518 grams total, 13-31 mm



Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's).

A rectangular sedimentary matrix displaying a Mioplosus sp. fossil fish. 937 grams, 17.8 x 13 cm



Ex Lincolnshire, UK, collection.

In southwest Wyoming (and parts of Colorado and Utah) in the Green River Formation are found some of the world's most outstanding specimens of fossil fish. The Green River system was composed of three lakes: Lake Ulinta, Lake Gosiute and Fossil Lake. These Eocene lakes lay in a series of intermountain basins formed by geological events that uplifted the Rocky Mountains during the early Tertiary time. The climate was much different from the desert-like climate of this area today. Both the fauna (crocodiles, alligators, boa constrictors and some subtropical fish families) and the flora (such as large palm trees) indicate a climate much like that found along the Gulf Coast today. Large amounts of ash found in the sediments indicate that volcanoes were particularly active at this time.

A group of three Morocops (Barrandeops) sp. trilobites on a matrix. 256 grams total, 51-59 mm



From the Atlas Mountains, Hamar Laghdad Formation, Pragian, (Alnif), Morocco, North Africa. From an old Oxford, UK, paleontological collection.