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LOT 2433
Natural History - Cut Fossil Ammonite Halves
MIDDLE CRETACEOUS PERIOD, 150 MILLION YEARS B.P.
3 3/8 in. (160 grams total, 86 mm each).
Polished to reveal the distinctive structure of the Cleoniceras sp. chambers, some iridescence. [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 2433
Natural History - Cut Fossil Ammonite Halves
Sold for (Inc. bp): £46
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Natural History - Fossil Otodus Shark Vertebra Group
Eocene Period, 56-33 million years B.P.Sold for (Inc. bp): £20
Comprising four Otodus obliquus vertebrae. 387 grams total, 75-87 mm
From a Cambridgeshire, UK, collection. -
Natural History - Knightia Fossil Fish in Matrix
Eocene Period, 56-33 million years B.P.Sold for (Inc. bp): £33
Comprising a Knightia alta specimen on a sedimentary matrix. 331 grams, 12.7 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 - Polished Fossil Ichthyosaurus Vertical Vertebra Section
Jurassic Period, 180 million years B.P.Sold for (Inc. bp): £8
Displaying one polished face containing vertebra section. 624 grams, 18.4 cm
From Whitby, North Yorkshire, UK. Ex UK collection.
Ichthyosaurs (from the Greek, meaning 'fish lizard') are extinct marine reptiles which resembled modern dolphins in appearance; the first complete UK specimen was found by the famous fossil hunter Mary Anning (1799-1847 AD) when she was just 12 years of age; the fossil she found is now in the Natural History Museum, London.
