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LOT 2390
Natural History - Cut and Polished Fossil Ammonite
MIDDLE CRETACEOUS PERIOD, 150 MILLION YEARS B.P.
3 - 3 1/8 in. (124 grams total, 77-81 mm).
Polished to reveal the distinctive structure of the Cleoniceras sp. chambers, some iridescence. [2, No Reserve]
ProvenanceFrom Madagascar.
Collected 1930-1960.
From the collection of the palaeontologist R. Gledhill.
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AUCTIONS:
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Natural History - Fossil Pine Cone
Eocene Period, circa 55-33 million years B.P.Sold for (Inc. bp): £78
An agatized Dicotaledon fruit specimen. 17 grams, 42 mm
From the Western Sahara Desert, Morocco. Acquired 1950s-1960s. From an old Bristol, UK, palaeontological collection. -
Natural History - NWA 2947 Chondrite Meteorite Slice in Gem Case
Sold for (Inc. bp): £46
A cut slice of NWA 2947 chondrite meteorite displayed in a collector's case. 4.82 grams total, 32 mm including case
From the Sahara Desert, North Africa. Property of a Sussex, UK, teacher. -
Natural History - Knightia Fossil Fish
Eocene Period, circa 58 million years B.P.Sold for (Inc. bp): £78
The rectangular matrix containing a Knightia alta fish. 147 grams, 12.8 cm
From Wyoming (Green River Formation), USA. Acquired during 1980s. From the Pradi Collection, Boston, U.S.A.
Seasonally some 58 million years ago, in the Green River region of Wyoming, torrential rains fell in the mountains. They flowed down the mountain sides, forming wide shallow lakes in the valley below. During the dry season, these lakes would dry up due to evaporation (as happens in 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 entombed all these fish. At a much later date, volcanic activity uplifted this area to expose the fossils.
