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LOT 1862
Natural History - Silver Streak Blue Kyanite Mineral Specimen Group
1 3/8 - 5 1/2 in. (1.29 kg total, 3.4-14.2 cm).
A group of 40 blue-silver kyanite mineral specimens of various sizes. [40, No Reserve]
ProvenanceMineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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LOT 1862
Natural History - Silver Streak Blue Kyanite Mineral Specimen Group
Sold for (Inc. bp): £7
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Natural History - North American T-Rex Dinosaur Coprolite
Cretaceous Period, 145-65 million years B.P.Sold for (Inc. bp): £26
A coprolite (fossilised dung) section from a North American tyrannosaurid dinosaur, possibly the famous T-Rex; held in a white card collector's tray. 286 grams, 89 mm
From USA. Ex Lincolnshire, UK, collection. -
Natural History - African 'T-Rex' Dinosaur Tooth
Cretaceous Period, 145-93 million years B.P.Sold for (Inc. bp): £416
A large fossil tooth from the dinosaur Carcharodontosaurus saharicus (the African T-Rex), with remains of enamelling and serration. 14.6 grams, 53 mm
From Morocco, North Africa. Property of a Sussex, UK, teacher.
The Carcharodontosaurus saharicus was one of the largest predators of all time (larger than its distant North American T-Rex cousin) and is related to Allosaurus and the South American Giganotosaurus. -
Natural History - Knightia Fossil Fish
Eocene Period, 56-33 million years B.P.Sold for (Inc. bp): £52
A pair of Knightia alta fossil fish in a matrix. 336 grams, 12.6 x 11 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.
