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LOT 1964
Natural History - Fossil Hollardops Trilobite
DEVONIAN PERIOD, CIRCA 417-354 MILLION YEARS B.P.
3 1/8 in. (165 grams, 80 mm).
Hollardops mesacristata on a matrix. [No Reserve]
ProvenanceFrom Morocco, North Africa.
From a Lincolnshire, UK, collection.
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AUCTIONS:
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![Natural History - Purple and Blue Triangular Fluorite Specimen Group [50]](https://timelineauctions.com/upload/images/items/small/207920-s.jpg)
Natural History - Purple and Blue Triangular Fluorite Specimen Group [50]
Sold for (Inc. bp): £35
Comprising variously sized translucent specimens in light blue to dark purple colour. 897 grams total, 33-39 mm
From China. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). -
Natural History - Large Polished 'Puddlestone' 50mm Thick Section
Sold for (Inc. bp): £3
With two lightly polished cut faces showing the internal structure of the specimen. 2.4 kg, 23 cm
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. 303 grams, 14.5 cm
From Wyoming (Green River Formation), USA. Acquired during 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.
