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LOT 2497
Natural History - Knightia Fossil Fish in Matrix
EOCENE PERIOD, 58-33 MILLION YEARS B.P.
6 1/8 in. (621 grams, 15.5 cm).
Displaying a fossil Knightia sp. fish. [No Reserve]
ProvenanceAcquired 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.
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AUCTIONS:
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LOT 2497
Natural History - Knightia Fossil Fish in Matrix
Sold for (Inc. bp): £46
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Natural History - Coloured Quartz Nodule
Sold for (Inc. bp): £39
Comprising two halves with enhanced purple crystals. 1.03 kg total, 11.8-12.2 cm
From a Cambridgeshire, UK, collection. -
Natural History - Insects in Baltic Amber Group
Oligocene Period, circa 45 million years B.P.Sold for (Inc. bp): £59
Comprising six pieces containing insects together with other inclusions. 4.56 grams total, 13-21 mm
Collected between 1930 and 1960. From the collection of the palaeontologist R Gledhill. -
Natural History - Fossil Keichousaurus Marine Reptile Skeleton
Triassic Period, 250 million years B.P.Sold for (Inc. bp): £780
On a rectangular matrix displaying the complete skeleton. 3.8 kg, 31 x 23 cm
From Xingyi, Guizhou, China. Acquired 1950s-1960s. From an old Bristol, UK, paleontological collection.
Keichousaurus was a late-Triassic marine reptile, and a member of the Pleurosaur family, and went extinct 250 million years ago during the Triassic-Jurassic extinction event. They were specialised fish eaters, and were highly unusual amongst marine reptiles in that they gave birth to live young rather than laying eggs.
