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LOT 2415
Natural History - Fossil Ammonite Cluster
JURASSIC PERIOD, 201-174 MILLION YEARS B.P.
5 in. (688 grams, 12.6 cm).
Comprising several different size ammonites, Gagaticeras or Promicroceras, on a nodule with some negative impressions. [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 - Knightia Fossil Fish in Matrix
Eocene Period, 58-33 million years B.P.Sold for (Inc. bp): £26
Displaying a fossil Knightia sp. fish. 553 grams, 15 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. -
Natural History - Sporadoceras Goniatite Display
Upper Devonian Period, 385-359 million years B.P.Sold for (Inc. bp): £34
Free-standing and polished through the shell to reveal the calcite preserved inside, showing the dividing gas chambers. 299 grams, 10.3 cm
From the Atlas Mountains, Morocco, North Africa. Acquired 1950s-1960s. From an old Bristol, UK, palaeontological collection. -
Natural History - Knightia Fossil Fish in Matrix
Eocene Period, 56-33 million years B.P.Sold for (Inc. bp): £33
Comprising a Knightia alta specimen on a sedimentary matrix. 331 grams, 12.7 cm
From Wyoming, Green River Formation, U.S.A. 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.
