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LOT 1998
Natural History - Historic Smithsonite Crystal Formation
2 1/4 in. (82 grams, 60 mm).
Comprising botryoidal formation of dark brown crystals. [No Reserve]
ProvenanceCollected in person from various parts of the world mainly between 1957-1966.
From the private mineral collection of Stephen Atkinson, Harpenden, UK.
Accompanied by a copy of a letter from the vendor giving details of him collecting these minerals throughout his life.
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AUCTIONS:
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LOT 1998
Natural History - Historic Smithsonite Crystal Formation
Sold for (Inc. bp): £13
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Natural History - Polished Fossil Goniatite Stand
Devonian Period, circa 417-354 million years B.P.Sold for (Inc. bp): £33
Comprising four Goniatite sp. set on a textured freestanding matrix. 2.36 kg, 20 cm high
From a Cambridgeshire, UK, collection. -
Natural History - Polished Fossil Orthoceras Column
Devonian Period, circa 417-354 million years B.P.Sold for (Inc. bp): £33
Comprising five polished Orthoceras sp. specimens on a textured freestanding matrix. 1.66 kg, 23.2 cm high
From a Cambridgeshire, UK, collection. -
Natural History - Knightia Fossil Fish
Eocene Period, circa 56-33 million years B.P.Sold for (Inc. bp): £59
Knightia alta specimen on a rectangular matrix. 427 grams, 18 cm
From Wyoming (Green River Formation), USA. Acquired 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.
