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LOT 2530
Natural History - Cut and Polished Fossil Ammonite Halves
MIDDLE CRETACEOUS PERIOD, 150 MILLION YEARS B.P.
3 5/8 - 3 1/2 in. (190 grams total, 87-90 mm).
Displaying the distinctive structure of the chambers of Cleoniceras sp. ammonite with some iridescence; chip to edge of one half. [2, No Reserve]
ProvenanceFrom Madagascar.
Collected between 1930 and 1960.
From the collection of the palaeontologist R Gledhill.
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AUCTIONS:
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LOT 2530
Natural History - Cut and Polished Fossil Ammonite Halves
Sold for (Inc. bp): £26
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Natural History - Fossil Cambropallas Trilobite
Devonian Period, 417-354 million years B.P.Sold for (Inc. bp): £104
On a teardrop-shaped matrix showing some good detail to the body. 2.4 kg, 27 cm
From a Cambridgeshire, UK, collection. -
Natural History - Fossil Rainbow Shell Ammonite
Middle Cretaceous Period, 150 million years B.P.Sold for (Inc. bp): £26
Displaying iridescence, possibly Beudanticeras sp. 200 grams, 91 mm
From Madagascar. Collected between 1930 and 1960. From the collection of the palaeontologist R Gledhill. -
Natural History - Priscacara Fossil Fish
Eocene Period, 58-36 million years B.P.Sold for (Inc. bp): £117
In a rectangular matrix. 385 grams, 16.5 x 13.5 cm
Fine condition. Scarce.
Lincolnshire, UK, collection.
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.
