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LOT 2435
Fossil Brittle Star on Matrix
ORDOVICIAN PERIOD, CIRCA 485-443 MILLION YEARS B.P.
6 3/8 in. (362 grams, 16 cm).
An irregular matrix with Ophiuroidea sp. specimen. [No Reserve]
ProvenanceFrom a Cambridgeshire, 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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![Group of Five [5] Cut and Polished Geode Half Specimens](https://timelineauctions.com/upload/images/items/small/255988-s.jpg)
Group of Five [5] Cut and Polished Geode Half Specimens
Sold for (Inc. bp): £20
Comprising five freestanding specimens with polished faces, some with enhanced colouring. 2.35 kg total, 10.7-11.4 cm
From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
![Group of Fifteen [15] Cut and Polished Agate Geode Slices and Halves](https://timelineauctions.com/upload/images/items/small/256013-s.jpg)
Group of Fifteen [15] Cut and Polished Agate Geode Slices and Halves
Sold for (Inc. bp): £26
Comprising five translucent, polished slices and ten cut and polished geode sections. 1.68 kg total, 5.3-14.2 cm
From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
Knightia Fossil Fish Plate Group
Eocene Period, circa 58-36 million years B.P.Sold for (Inc. bp): £52
Comprising three circular plates, each with a Knightia alta fish, and a fourth plate with small remains of one. 165 grams total, 71-80 mm
From Wyoming, 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 Uinta, 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.
