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LOT 2362
Natural History - A Collection of Fossils
DEVONIAN TO JURASSIC PERIOD, CIRCA 417-145 MILLION YEARS B.P.
3 - 6 1/8 in. (584 grams total, 7.4-15.5 cm).
Mixed group including Perisphinctids indogermanus ammonite, Goniatite and Orthoceras. [3, No Reserve]
ProvenanceFrom a collection acquired on the UK art market from various auction houses and collections mostly before 2000.
From an important Cambridgeshire estate; thence by descent.
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AUCTIONS:
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Natural History - Scunthorpe Fossil Ammonite Group
Jurassic Period, circa 200 million years B.P.Sold for (Inc. bp): £20
Comprising two cut and polished Aegasteroceras sagittarium ammonites showing good detailing. 261 grams total, 70-96 mm
From Conesby Quarry, Scunthorpe, UK. From a Lincolnshire, UK, collection. -
![Natural History - Mini Agate Crystal Geode Cut Half Group [100]](https://timelineauctions.com/upload/images/items/small/211376-s.jpg)
Natural History - Mini Agate Crystal Geode Cut Half Group [100]
Sold for (Inc. bp): £13
Most with an exposed internal cavity filled with small quartz crystals. 635 grams total, 20-43 mm
From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). -
Natural History - Knightia Fossil Fish
Eocene Period, circa 56-33 million years B.P.Sold for (Inc. bp): £46
Knightia alta specimen on a rectangular matrix. 1.03 kg, 19.8 cm
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.
