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LOT 2272
Very Large Cut and Polished Agatized Fossil Tree Trunk Slice
TRIASSIC PERIOD, 251-199 MILLION YEARS B.P.
12 in. (1.54 kg, 30.7 cm).
Showing bark detail on the edges, the cut faces showing attractive agatized patterns. [No Reserve]
ProvenanceFrom Madagascar.
Ex Mineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's), Harwich, UK.
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AUCTIONS:
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LOT 2272
Very Large Cut and Polished Agatized Fossil Tree Trunk Slice
Sold for (Inc. bp): £52
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Polished Sodalite Mineral Specimen Group [100]
Sold for (Inc. bp): £26
Dark blue polished pebbles with white veining. 450 grams total, 15-26 mm
Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
Fossil Ginko Leaf in Matrix
Carboniferous Period, circa 359-299 million years B.P.Sold for (Inc. bp): £39
A light-coloured specimen on a roughly rectangular matrix. 169 grams, 76 mm
From a Cambridgeshire, UK, collection. -
Multiple Knightia Fossil Fish in Matrix
Eocene Period, circa 58-36 million years B.P.Sold for (Inc. bp): £33
Comprising three Knightia alta specimens. 438 grams, 12 cm
From Wyoming (Green River Formation), USA. 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.
