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LOT 2399
Natural History - Fossil Cockroach in Matrix
LOWER CRETACEOUS PERIOD, 108-92 MILLION YEARS B.P.
3 7/8 in. (193 grams, 97 mm).
Embedded in laminated limestone and showing some good detail of the insect. [No Reserve]
ProvenanceFrom the Santana Formation, Brazil.
Acquired 1950s-1960s.
From an old Bristol, UK, paleontological collection.
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AUCTIONS:
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Natural History - Fossil Mosasaur Tooth and Fish Bone Display
Cretaceous Period, 145-65 million years B.P.Sold for (Inc. bp): £20
Comprising two teeth and various fish bone fragments set on a sandstone matrix. 400 grams, 11.1 cm
From a Cambridgeshire, UK, collection. -
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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 - Fossil Keichousaurus Marine Reptile Skeleton
Triassic Period, 250 million years B.P.Sold for (Inc. bp): £780
On a rectangular matrix displaying the complete skeleton. 3.8 kg, 31 x 23 cm
From Xingyi, Guizhou, China. Acquired 1950s-1960s. From an old Bristol, UK, paleontological collection.
Keichousaurus was a late-Triassic marine reptile, and a member of the Pleurosaur family, and went extinct 250 million years ago during the Triassic-Jurassic extinction event. They were specialised fish eaters, and were highly unusual amongst marine reptiles in that they gave birth to live young rather than laying eggs.
