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LOT 2402
Natural History - Large Whitby Dactylioceras Ammonite Fossil
LOWER JURASSIC PERIOD, TOARCIAN STAGE, CIRCA 180 MILLION YEARS B.P.
4 1/2 in. (772 grams, 11.8 cm).
Comprising Dactylioceras tenuicostatum positive in a nodule. [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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LOT 2402
Natural History - Large Whitby Dactylioceras Ammonite Fossil
Sold for (Inc. bp): £16
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Natural History - Mosasaur Fossil Jaw Section
Late Cretaceous Period, 70 million years B.P.Sold for (Inc. bp): £26
Comprising a partial jaw and two teeth from Igdamanosaurus aegyptiacus. 110 grams, 72 mm
From the Oulad Abdoun Basin, Morocco, North Africa. Collected between 1930 and 1960. From the collection of the palaeontologist R Gledhill.
Most Mosasaurs had sharp teeth that had evolved to grab slippery prey such as fish. Igdamanosaurus had semi-spherical teeth with rounded points, which were better suited for crushing tough-armoured prey such as turtles, ammonites, nautili, and bivalves. -
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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 - Cut Fossil Ammonite Halves
Middle Cretaceous Period, 150 million years B.P.Sold for (Inc. bp): £26
Polished to reveal the distinctive structure of the Cleoniceras sp. chambers, some iridescence; chip to edge of one half. 357 grams total, 11.2 cm each
From Madagascar. Collected between 1930 and 1960. From the collection of the palaeontologist R Gledhill.
