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LOT 2300
Whitby Dactylioceras Fossil Ammonite
JURASSIC PERIOD, TOARCIAN STAGE, CIRCA 180 MILLION YEARS B.P.
4 3/4 in. (678 grams, 12.1 cm).
A rounded pebble half containing a Dactylioceras tenuicostatum sp. specimen. [No Reserve]
ProvenanceFrom Yorkshire coast.
From a Lincolnshire, UK, collection.
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AUCTIONS:
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Fossil Otodus Shark's Tooth in Display
Eocene Period, circa 56-33 million years B.P.Sold for (Inc. bp): £33
Comprising an Otodus obliquus tooth in a display frame. 15.5 grams, 50 mm (52 grams total, 12.7 cm including stand )
From a Lincolnshire, UK, collection. -
Polished Fossil Coral Head Heart Collection
Devonian Period, circa 417-354 million years B.P.Sold for (Inc. bp): £26
Comprising five polished shapes showing the internal structure of the head. 123 grams total, 33-36 mm
From a Cambridgeshire, UK, collection. -
Knightia Fossil Fish in Matrix Group
Eocene Period, circa 58-36 million years B.P.Sold for (Inc. bp): £33
Comprising three rounded matrices with Knightia alta. 211 grams total, 78-84 mm
From Wyoming (Green River Formation), USA. From a Lincolnshire, UK, collection.
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.
