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LOT 2477
Natural History - Fossil 'Sand Dollar' on Matrix
JURASSIC PERIOD, 199-145 MILLION YEARS B.P.
6 3/4 in. (555 grams, 17 cm).
Comprising a large specimen on a sandstone matrix. [No Reserve]
ProvenanceFrom a Lincolnshire, 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 - Juvenile Megalodon Giant Shark Fossil Tooth Pair
Miocene-Pliocene Period, 23-3.5 million years B.P.Sold for (Inc. bp): £33
Displaying some serrations and good enamel, from the Carcharocles megalodon shark. 73.2 grams total, 61-69 mm
From Florida, U.S.A. Collected between 1930 and 1960. From the collection of the palaeontologist R Gledhill. -
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Natural History - Fossil Brittle Star Group
Ordovician Period, 485-444 million years B.P.Sold for (Inc. bp): £26
Comprising three matrices displaying four partial Ophiuroidea sp. brittle stars; held in a white card collector's tray. 410 grams total, 79-97 mm
Fine condition.
From El Kaid Errami, Tafilalt, Morocco, North Africa. Ex an old German paleontological 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.
