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LOT 2285
Natural History - Knightia Fossil Fish Group
EOCENE PERIOD, 56-33 MILLION YEARS B.P.
2 7/8 - 3 3/8 in. (174 grams total, 72-85 mm).
Comprising three round matrices, two with a single specimen and the third matrix with two overlapping Knightia alta fossil fish with remains of another to the edge. [3, No Reserve]
ProvenanceEx Lincolnshire, UK, collection.
FootnotesIn 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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Natural History - Polished Ammonite Coaster Group
Jurassic Period, 199-145 million years B.P.Sold for (Inc. bp): £130
Comprising three composites of various sized ammonites with polished upper surface. 236 grams, 80-83 mm
From Madagascar. Ex Lincolnshire, UK, collection. -
Natural History - Fossilised Wood Slice Group
Triassic Period, circa 230 million years B.P.Sold for (Inc. bp): £26
Comprising three polished specimens. 545 grams total, 8-12.6 cm
From Madagascar. Acquired 1950s-1960s. From an old Bristol, UK, palaeontological collection. -
Natural History - Large British Asteroceras Fossil Ammonite
Jurassic Period, circa 202-201 million years B.P.Estimate: £1,500 - 2,000 (+bp*)
Opening Bid: £278
An Asteroceras sp. polished fossil ammonite displayed in a free-standing matrix; from the Frodingham Ironstone Member. 3.5 kg, 22 cm wide
From the exhausted Coningsby Quarry, Scunthorpe, Lincolnshire, UK.