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LOT 2515
Natural History - Diplomystus Fish Fossil
EOCENE PERIOD, 58-36 MILLION YEARS B.P.
5 in. (406 grams, 12.6 cm).
On a sandstone matrix, Diplomystus humilus, with an old information label attached to the matrix. [No Reserve]
ProvenanceFrom Green River Formation, Wyoming, USA.
From a Yorkshire, UK, collection.
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AUCTIONS:
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Natural History - Fossil Diplomystus Fish
Eocene Period, 56-33 million years B.P.Sold for (Inc. bp): £33
In a matrix. 112 grams, 13.2 x 8.5 cm
Fine condition.
From the Green River Formation, Lincoln County, Wyoming, U.S.A. From an old Lincoln 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. -
Natural History - Cut and Polished Fossil Ammonite Halves
Middle Cretaceous Period, 150 million years B.P.Sold for (Inc. bp): £26
Displaying the distinctive structure of the chambers of Cleoniceras sp. ammonite with some iridescence; chip to edge of one half. 190 grams total, 87-90 mm
From Madagascar. Collected between 1930 and 1960. From the collection of the palaeontologist R Gledhill. -
Natural History - North American T-Rex Coprolite
Cretaceous Period, 83-66 million years B.P.Sold for (Inc. bp): £20
Cut specimen with rounded upper face. 191 grams, 77 mm
From a Lincolnshire, UK, collection.
