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LOT 2450
Natural History - Fossil Rastellum Bivalve
MIDDLE JURASSIC-LATE CRETACEOUS PERIOD, 174-66 MILLION YEARS B.P.
2 7/8 in. (120 grams, 73 mm).
The mollusc specimen with a narrow-valved tubular shell. [No Reserve]
ProvenanceFrom a Cambridgeshire, UK, collection.
CONDITIONTimeLine Auctions follows a vetting process to ensure the authenticity and legality of all items, reinforcing our commitment to integrity and responsible trading. Each antiquity, antique, and coin lot undergoes thorough examination by a vetting committee of at least ten external specialists, professional trade association members, scientists, and archaeologists: Our Vetting Process
AUCTIONS:
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Natural History - Fossil Rastellum Bivalve
Middle Jurassic-late Cretaceous Period, 174-66 million years B.P.Sold for (Inc. bp): £26
The mollusc specimen with a narrow-valved tubular shell. 120 grams, 73 mm
From a Cambridgeshire, UK, collection. -
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Natural History - Lapis Lazuli Mineral Specimen Group
Sold for (Inc. bp): £156
Three large pieces of extremely fine lapis lazuli with good pyrite inclusions. 1.4 kg total, 7-11.7 cm
Extremely fine condition.
Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). -
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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.
