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LOT 2210
Natural History - Fossil Declivolithus Trilobite
ORDOVICIAN PERIOD, CIRCA 450 MILLION YEARS B.P.
4 3/8 in. (239 grams, 11 cm).
A rare Declivolithus sp. (Nankinolithus) trilobite on matrix; some restoration. [No Reserve]
ProvenanceFrom the Upper Ordovician Lower Ktaoua Formation
From a Cambridgeshire, UK, collection.
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AUCTIONS:
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Natural History - Polished Fossilised Wood Section
Late Triassic period, circa 225 million years B.P.Sold for (Inc. bp): £7
Cut to a freestanding shape with two polished faces. 695 grams, 12 cm
From a Lincolnshire, UK, collection. -
Natural History - Fossil Diplomystus Fish
Eocene Period, circa 58 million years B.PSold for (Inc. bp): £59
Diplomystus sp. specimen on a matrix. 398 grams, 15.2 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. -
Natural History - Fossil Ginko Leaf
Carboniferous Period, 359-299 million years B.P.Sold for (Inc. bp): £169
On an irregular matrix. 102 grams, 75 mm
From the Sentinel Butte Formation, Morton County, North Dakota, USA. From a Cambridgeshire, UK, collection.
