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LOT 2304
Natural History - Fossil Cornuproetus Trilobite
UPPER DEVONIAN PERIOD, 385-359 MILLION YEARS B.P.
3 5/8 in. (230 grams, 93 mm).
A fossil Cornuproetus midasamlanensis trilobite on a matrix. [No Reserve]
ProvenanceFrom the Atlas Mountains, Hamar Laghdad Formation, Pragian, (Alnif), Morocco, North Africa.
From a Cambridgeshire, UK, collection.
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AUCTIONS:
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Natural History - Cut and Polished Fossil Ammonite
Middle Cretaceous Period, circa 150 million years B.P.Sold for (Inc. bp): £46
Cleoniceras sp. displaying the distinctive pattern of the cross-section chambers. 173 grams total, 87-91 mm
From Madagascar. Collected between 1930 and 1960. From the collection of the palaeontologist R Gledhill. -
Natural History - Cut and Polished Pyrite Crystal Block
Sold for (Inc. bp): £7
Comprising a roughly rectangular matrix with one polished face containing a large quantity of pyrite crystals. 729 grams, 85 mm
Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). -
Natural History - Fossil Diplomystus Fish
Eocene period, circa 58 million years B.P.Sold for (Inc. bp): £111
Diplomystus sp. specimen on a matrix. 328 grams, 14.5 cm
From Wyoming (Green River Formation), USA. From a 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.
