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LOT 2407
Knightia Double Fossil Fish Plate
EOCENE PERIOD, CIRCA 58-36 MILLION YEARS B.P.
4 in. (47.5 grams, 10.2 cm).
An oval matrix with Knightia alta specimens. [No Reserve]
ProvenanceFrom Wyoming, USA.
From a Cambridgeshire, 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 2407
Knightia Double Fossil Fish Plate
Estimate £20 - 30€23 - 35 (for guidance only)$27 - 41 (for guidance only)
Opening Bid
£5 (EUR 6; USD 7) +BP*
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Bismuth Crystal Display Formation
Estimate: £20 - 30 (+bp*)
Opening Bid: £5
Cluster of hopper crystals exhibiting a stairstep crystal structure and iridescent colours. 21 grams, 36 mm
From a Cambridgeshire, UK, collection. -
Large Natural Raw Malachite Specimen
Estimate: £40 - 60 (+bp*)
Opening Bid: £5
Botryoidal specimen showing characteristic banding. 1.75 kg, 13.1 cm
From the Democratic Republic of Congo, Central Africa. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
Fossil Sapindopsis Plant Leaf
Cretaceous Period, circa 145-66 million years B.P.Estimate: £30 - 40 (+bp*)
Opening Bid: £5
Comprising three joined leaves from an extinct genus Sapindopsis, related to the modern Platanaceae family. 1.08 kg, 20.5 cm
From Lebanon. From a Cambridgeshire, UK, collection.