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LOT 3224
Iridescent Fossil Cleoniceras Ammonite Set in Slate
LOWER CRETACEOUS PERIOD, CIRCA 110 MILLION YEARS B.P.
8 5/8 x 7 1/2 in. (1.64 kg, 22 x 19 cm).
Polished specimen showing attractive iridescence, carefully released from a matrix and mounted on a slate tile. [No Reserve]
ProvenanceFrom Madagascar.
Property of a Bristol, UK, gentleman collector.
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AUCTIONS:
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LOT 3224
Iridescent Fossil Cleoniceras Ammonite Set in Slate
Estimate £60 - 80€70 - 93 (for guidance only)$81 - 108 (for guidance only)
Opening Bid
£5 (EUR 6; USD 7) +BP*
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Smokey Blue 'Ghostbusters Slimer' Agate Slice
Estimate: £40 - 60 (+bp*)
Opening Bid: £5
Polished slice with fanciful facial image at the centre, viewable from both sides. 80 grams, 92 mm
From Brazil. Property of a Bristol, UK, gentleman collector. -
North American Knightia Fossil Fish
Eocene Period, 58-36 million years B.P.Estimate: £30 - 40 (+bp*)
Opening Bid: £5
Oval matrix with a Knightia alta specimen. 57 grams, 92 mm
From Green River formation, 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 period. 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. -
Tiger Iron Mineral Rock Display Slice
Circa 2.2 billion years B.P.Estimate: £30 - 40 (+bp*)
Bids: 1 | Current Bid: £5
Polished slab showing contrasting banding in various shades of brown. 875 grams, 20.5 x 15.2 cm
From Western Australia. Property of a Bristol, UK, gentleman collector.
Tiger iron is a 1.8- to 2.5-billion-year-old metamorphic rock composed of alternating bands of hematite, red jasper, and golden tiger's eye, closely linked in origin to ancient photosynthetic cyanobacteria. Early fossil algae helped create the oxygen-rich atmosphere that eventually allowed life on Earth to flourish.
