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LOT 2003
Natural History - Citrine Crystal Specimen Group
3/4 - 1 1/4 in. (1.24 kg total, 22-33 mm).
A group of 100 variously sized citrine crystals displaying shades of orange-brown. [100, No Reserve]
ProvenanceMineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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Natural History - English Fossil Crab Group
Eocene Period, 56-33 million years B.P.Sold for (Inc. bp): £7
A pair of fossilised Zanthopsis leachi (Desmarest) crabs. 89 grams total, 46 mm wide
From the Isle of Sheppey, Kent, UK. Acquired 1950s-1960s. From an old Bristol, UK, paleontological collection. -
Natural History - Sporadoceras Fossil Goniatite
Upper Devonian Period, 385-359 million years B.P.Sold for (Inc. bp): £78
A large free standing Sporadoceras sp. goniatite, polished through to reveal the calcite preserved inside and showing the dividing gas chambers known as suture patterns. 805 grams, 15.5 cm
From the Atlas Mountains, Morocco, North Africa. Acquired 1950s-1960s. From an old Bristol, UK, paleontological collection. -
Natural History - Knightia Fossil Fish
Eocene Period, 56-33 million years B.P.Sold for (Inc. bp): £39
A Knightia alta fossil fish in matrix. 277 grams, 13 x 9.5 cm
From Wyoming, Green River Formation, U.S.A. Acquired during the 1980s. From the Pradi Collection, Boston, U.S.A.
Seasonally, some 56 million years ago, in the Green River Region of Wyoming, torrential rains fell on the mountains. The rain flowed down the mountain sides, forming wide shallow lakes in the valley below. During the dry season, these lakes evaporated (similar to certain parts of Africa today). Millions of fish died in this short period of time. This climatic cycle happened over a 20-thousand-year period. Layer upon layer of mud was deposited over these years, entombing huge numbers of fish. At a much later date volcanic activity uplifted this area to expose their fossils.
