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LOT 2511
Natural History - Fossilised Wood Slice Group
TRIASSIC PERIOD, 230 MILLION YEARS B.P.
3 1/4 - 4 in. (470 grams total, 8.4-10 cm).
Comprising three polished slices. [No Reserve]
ProvenanceAcquired 1950s-1960s.
From an old Bristol, UK, palaeontological collection.
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AUCTIONS:
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Natural History - Cut Fossil Ammonite Halves
Middle Cretaceous Period, 150 million years B.P.Sold for (Inc. bp): £46
Polished to reveal the distinctive structure of the Cleoniceras sp. chambers, some iridescence. 160 grams total, 86 mm each
From Madagascar. Collected between 1930 and 1960. From the collection of the palaeontologist R Gledhill. -
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Natural History - Knightia Fossil Fish
Eocene Period, 56-33 million years B.P.Sold for (Inc. bp): £33
In a rectangular matrix. 345 grams, 18 x 12.5 cm
Fine condition.
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. -
Natural History - Dolphin Vertebra Group
Miocene Age, circa 15 million years B.P.Sold for (Inc. bp): £13
Comprising four Delphinus sp. vertebrae. 352 grams total, 56-91 mm
From North Carolina, U.S.A. Acquired 1950s-1960s. From an old Bristol, UK, palaeontological collection.
