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LOT 2429
Natural History - Cut Fossil Ammonite Halves
MIDDLE CRETACEOUS PERIOD, 150 MILLION YEARS B.P.
4 in. (256 grams total, 10-10.3 cm).
Polished to reveal the distinctive structure of the Cleoniceras sp. chambers, some iridescence; chip to edge of one half. [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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LOT 2429
Natural History - Cut Fossil Ammonite Halves
Sold for (Inc. bp): £39
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Natural History - Woolly Mammoth Bone Bead Necklace String
Devensian Period, 110,000-12,000 years B.P.Sold for (Inc. bp): £91
Restrung using polished Mammuthus primigenius bone beads. 107 grams, 66 cm long
From an old Lincoln, UK, collection. -
Natural History - Knightia Fossil Fish in Matrix
Eocene Period, 56-33 million years B.P.Sold for (Inc. bp): £52
Displaying a Knightia alta specimen. 348 grams, 14.2 cm
From Wyoming, Green River Formation, U.S.A. Acquired during the 1980s. From the Pradi Collection, Boston, U.S.A.
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. -
Natural History - Cut Fossil Ammonite Halves
Middle Cretaceous Period, 150 million years B.P.Sold for (Inc. bp): £26
Polished to reveal the distinctive structure of the chambers of Cleoniceras sp. ammonite with some iridescence; chip to edge of one half. 155 grams total, 88-89 mm
From Madagascar. Collected between 1930 and 1960. From the collection of the palaeontologist R Gledhill.
