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LOT 3103
Fossil Cidaris Sea Urchins with Spines
MIDDLE JURASSIC PERIOD, CIRCA 150 MILLION YEARS B.P.
10 5/8 in. (2.69 kg, 27 cm).
Group of fossilised pencil urchins on a matrix with numerous spines.
ProvenanceFrom Ardennes, France.
Property of a Bristol, UK, gentleman collector.
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AUCTIONS:
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LOT 3103
Fossil Cidaris Sea Urchins with Spines
Estimate £120 - 170€140 - 200 (for guidance only)$160 - 230 (for guidance only)
Opening Bid
£60 (EUR 70; USD 81) +BP*
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Group of Four [4] Flower Quartz Display Specimens
Estimate: £30 - 40 (+bp*)
Opening Bid: £5
Comprising four matrix sections with flower-like formations of quartz. 762 grams total, 9.3-12.6 cm
From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
Polished Malachite Mineral Display Specimen
Estimate: £70 - 90 (+bp*)
Opening Bid: £5
Irregular block of malachite polished to a rounded shape with colour variations enhanced. 830 grams, 13.2 cm
From Zaire. Property of a Bristol, UK, gentleman collector. -
Three North American Knightia Fossil Fish
Eocene Period, 58-36 million years B.P.Estimate: £40 - 60 (+bp*)
Opening Bid: £5
Comprising three oval matrices with Knightia alta specimens, the largest with two overlapping fish. 148 grams total, 71-85 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.
