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LOT 2162
Natural History - Knightia Fossil Fish
EOCENE PERIOD, CIRCA 58 MILLION YEARS B.P.
4 5/8 in. (198 grams, 11.8 cm).
Comprising the negative impression of Knightia alta specimen on a rectangular matrix with enhanced details. [No Reserve]
ProvenanceFrom Wyoming (Green River Formation), USA.
Acquired during 1980s.
From the Pradi Collection, Boston, USA.
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.
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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![Natural History - Boxed Mixed Crystal Display Specimen Group [6]](https://timelineauctions.com/upload/images/items/small/211436-s.jpg)
Natural History - Boxed Mixed Crystal Display Specimen Group [6]
Sold for (Inc. bp): £20
Comprising: brown calcite from Chihuahua, Mexico; calcite from Tri-State, USA; grossular garnet from Chihuahua, Mexico; nailhead calcite from Tri-State, USA; pyrite; calcite. 568 grams total, 45-58 mm
From Chihuahua, Mexico; Peru, Brazil and Tri-State, U.S.A. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). -
Natural History - Green River Fossil Fish Group
Eocene Period, circa 56-33 million years B.PSold for (Inc. bp): £59
Two Green River fish specimens Diplomystus sp. in a matrix. 243 grams, 15.8 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. -
Natural History - Fossil Speculator Trilobite
Devonian Period, circa 417-354 million years B.P.Sold for (Inc. bp): £65
Phacops speculator specimen on a matrix. 193 grams, 76 mm
From the Atlas Mountains, Hamar Laghdad Formation, Pragian, (Alnif), Morocco, North Africa. From a Cambridgeshire, UK, collection.
