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LOT 0437
Natural History - Large Multi Fossil Fish Plate
EOCENE PERIOD, CIRCA 56-33 MILLION YEARS B.P.
19 7/8 x 15 in. (8.25 kg, 50.5 x 38 cm).
The large sandstone matrix with five Knightia alta specimens.
ProvenanceFrom a Lincolnshire, UK, collection.
FootnotesIn 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.
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AUCTIONS:
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Natural History - Large Amethyst Crystal Lump Group [34]
Sold for (Inc. bp): £59
Comprising large irregular chunks in light to dark purple colour. 2.26 kg total, 42-93 mm
From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). -
Natural History - Mixed Cut and Polished Agate Crystal Geode Half Group [10]
Sold for (Inc. bp): £20
Each displaying banding in various colours and crystal filled cavities. 957 grams total, 55-75 mm
From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). -
Natural History - Large Size Cut and Polished Pink Agate Crystal Geode Slice
Sold for (Inc. bp): £52
With enhanced pink-colour and also showing translucent to opaque quartz crystals. 539 grams, 23.2 cm
Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's).