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LOT 2430
Knightia Fossil Fish Plate Group
EOCENE PERIOD, CIRCA 58-36 MILLION YEARS B.P.
2 3/4 - 3 1/8 in. (165 grams total, 71-80 mm).
Comprising three circular plates, each with a Knightia alta fish, and a fourth plate with small remains of one. [4, No Reserve]
ProvenanceFrom 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.
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AUCTIONS:
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LOT 2430
Knightia Fossil Fish Plate Group
Estimate £40 - 60€46 - 70 (for guidance only)$54 - 81 (for guidance only)
Opening Bid
£5 (EUR 6; USD 7) +BP*
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Group of Three [3] Large Cut and Polished Agate Geode Specimens
Estimate: £20 - 30 (+bp*)
Opening Bid: £5
Comprising three freestanding sections with polished faces showing mainly grey and brown banding, and each with a central crystal-lined cavity. 2.06 kg total, 9.7-12.2 cm
From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
Group of Twenty-Seven [27] Cut and Polished Agate Geode Specimens
Estimate: £30 - 40 (+bp*)
Opening Bid: £5
Boxed group of agate geode halves, most showing attractive banding and crystal-lined interiors, one an unopened geode with a polished face. 2.48 kg total, 2.8-10.8 cm
From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
Fossil Diplomystus Fish in Matrix
Eocene Priod, 58-36 million years B.P.Estimate: £30 - 40 (+bp*)
Opening Bid: £5
On a rectangular matrix, showing good spine and tail detail. 469 grams, 18 cm
From Green River formation, Wyoming, USA. From the private collection of Kenneth Machin (1936-2020), Buckinghamshire, UK; his collection of antiquities and natural history was formed since 1948; thence by descent.