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LOT 2365
Natural History - Fossil Brittle Star Group
ORDOVICIAN PERIOD, 485-444 MILLION YEARS B.P.
3 1/2 - 4 1/2 in. (330 grams total, 9.1-11.4 cm).
Comprising three Ophiuroidea sp. specimens on matrices. [3, No Reserve]
ProvenanceFrom El Kaid Errami, Tafilalt, Morocco, North Africa.
From an old German collection.
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AUCTIONS:
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Natural History - Amber with Insect Inclusions
Oligocene Period, circa 45 million years B.P.Sold for (Inc. bp): £7
Including at least one fly; with a polished teardrop-shaped body. 1.36 grams, 25 mm
Ex private UK collection formed in the 1980s. -
Natural History - Fossil Phacops Trilobite
Devonian Period, circa 380 million years B.P.Sold for (Inc. bp): £39
With surface texture to the head and spine; on a limestone matrix. 164 grams, 75 mm
From Hamar L'Aghdad, Djebel Issoumour area, Anti-Atlas Mountains, Morocco. From a Cambridgeshire, UK, collection. -
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.
