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![Brown and Black Obsidian Mineral Specimen Group [100]](https://timelineauctions.com/zoom_images/zoomthumb/2/2/227877_900x900.jpg "Brown and Black Obsidian Mineral Specimen Group [100]")
![Brown and Black Obsidian Mineral Specimen Group [100]](https://timelineauctions.com/zoom_images/zoommap/2/2/227877_200x200.jpg "Brown and Black Obsidian Mineral Specimen Group [100]")
![Brown and Black Obsidian Mineral Specimen Group [100]](https://timelineauctions.com/upload/images/items/227877.jpg "Brown and Black Obsidian Mineral Specimen Group [100]")
LOT 2754
Brown and Black Obsidian Mineral Specimen Group [100]
1 3/8 - 1 5/8 in. (1.18 kg total, 34-43 mm).
Comprising large irregular chunks. [100, No Reserve]
ProvenanceEx Mineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's), Harwich, UK.
TimeLine 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:
TimeLine is a leading auction house specialising in antiquities, ancient art, collectables, natural history, coins, medals, and books. Our auctions offer museums, collectors, historians, and enthusiasts the opportunity to acquire unique and historically significant pieces.
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Phacops Fossil Trilobite in Matrix
Devonian Period, circa 444-439 million years B.P.Sold for (Inc. bp): £39
The aquatic arthropod showing good detail to the carapace, resting on an irregular matrix. 158 grams, 74 mm
From a Cambridgeshire, UK, collection. -
Large Cut and Polished Fossilised Tree Trunk Section
Triassic Period, circa 235 million years B.P.Sold for (Inc. bp): £78
Lacquered and displaying beautiful red and brown banding. 2.55 kg, 19.7 cm
Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
Green River Fish Fossils
Eocene Period, circa 58-36 million years B.P.Sold for (Inc. bp): £33
Comprising three rounded matrices with Knightia alta fish fossils. 143 grams total, 8.6-10.5 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.
