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LOT 2504
Natural History - Large Fossil North African 'T-Rex' Tooth
CRETACEOUS PERIOD, 145-65 MILLION YEARS B.P.
3 3/4 in. (55 grams, 94 mm).
From Carcharodontosaurus saharicus displaying some serrations and partial root. [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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LOT 2504
Natural History - Large Fossil North African 'T-Rex' Tooth
Sold for (Inc. bp): £546
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Natural History - White Pecopteris Fossil Fern Group
Carboniferous Period, 359-299 million years B.P.Sold for (Inc. bp): £13
Contained in a matrix with specimens to both sides. 1.34 kg total, 20-21 cm
From St. Clair, Pennsylvania, U.S.A. Acquired during the 1980s. From the Pradi Collection, Boston, U.S.A.
These fern fossils commonly found in coal-mining areas worldwide. However, the St. Clair ferns are treasured for their rarity and beauty, a result of the fossilised ferns gaining a coating of the mineral pyrophyllite which contrasts with the natural black shale matrix. -
Natural History - Knightia Fossil Fish in Matrix
Eocene Period, 58-33 million years B.P.Sold for (Inc. bp): £33
Displaying a fossil Knightia sp. fish. 235 grams, 12.2 cm
Acquired during the 1980s. From the Pradi Collection, Boston, U.S.A.
In southwest Wyoming (and parts of Colorado and Utah) in the Green River Formation are found some of the world's most outstanding specimens of fossil fish. The Green River system was composed of three lakes: Lake Ulinta, Lake Gosiute and Fossil Lake. These Eocene lakes lay in a series of intermountain basins formed by geological events that uplifted the Rocky Mountains during the early Tertiary time. The climate was much different from the desert-like climate of this area today. Both the fauna (crocodiles, alligators, boa constrictors and some subtropical fish families) and the flora (such as large palm trees) indicate a climate much like that found along the Gulf Coast today. Large amounts of ash found in the sediments indicate that volcanoes were particularly active at this time. -
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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.
