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LOT 2062
Natural History - Fossilised Wood Slice
TRIASSIC PERIOD, CIRCA 230 MILLION YEARS B.P.
7 1/2 in. (1.11 kg, 19.2 cm).
The large slice with two polished faces showing some good detail. [No Reserve]
ProvenanceAcquired 1950s-1960s.
From an old Bristol, UK, palaeontological collection.
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AUCTIONS:
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Natural History - Polished 'Orca' Agate Specimen
Sold for (Inc. bp): £46
Freestanding and polished to expose the intricate black and white pattern composition within the sample. 490 grams, 10.1 cm
From a Cambridgeshire, UK, collection. -
Natural History - Boxed Historic 'Coral' Calcite Specimen
Sold for (Inc. bp): £20
The white druzy crystals on a freestanding matrix. 170 grams, 85 mm
Ex Gregory, Bottley & Lloyd (Gregory's). -
Natural History - Knightia Fossil Fish
Eocene Period, circa 56-33 million years B.P.Sold for (Inc. bp): £52
The Knightia alta specimen on a sandstone matrix with remains of another fish. 1 kg, 17.5 x 14.5 cm
From a Lincolnshire, 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.
