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LOT 2172
Natural History - Cut and Polished Fossil Ammonite
CRETACEOUS PERIOD, CIRCA 150 MILLION YEARS B.P.
4 1/8 - 4 1/4 in. (269 grams total, 10.5-10.7 cm).
Cleoniceras sp. displaying the distinctive pattern of the cross-section chambers. [2, No Reserve]
ProvenanceFrom Madagascar.
Collected between 1930 and 1960.
From the collection of the palaeontologist R Gledhill.
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AUCTIONS:
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![Natural History - Yellow Calcite Mineral Specimen Group [100]](https://timelineauctions.com/upload/images/items/small/211341-s.jpg)
Natural History - Yellow Calcite Mineral Specimen Group [100]
Sold for (Inc. bp): £7
Comprising a large quantity of bright yellow specimens. 1.13 kg total, 14-68 mm
Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). -
Natural History - Iridescent Rainbow Shell Ammonite
Cretaceous Period, circa 113-100 million years B.P.Sold for (Inc. bp): £59
Cleoniceras besairiei with large portions of the shell with rainbow iridescence. 100 grams, 72 mm
From Madagascar. Acquired 1950s-1960s. From an old Bristol, UK, palaeontological collection. -
Natural History - Fossil Diplomystus Fish
Eocene Period, circa 58 million years B.P.Sold for (Inc. bp): £39
Diplomystus sp. specimen on a rectangular matrix. 234 grams, 13.7 cm
From Wyoming (Green River Formation), USA. From an old Bristol, 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.
