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LOT 2369
Natural History - Large Crystalline Malachite Boulder
3 3/4 in. (578 grams, 96 mm).
The dark green surface formations with iron carbonate. [No Reserve]
ProvenanceFrom Democratic Republic of the Congo.
Ex Mineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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Natural History - Fossil Dorsal Spine of a Shark
Mesozoic Era, 250-65 million years B.P.Sold for (Inc. bp): £20
From the extinct Hybodus sp. shark, showing excellent preserved detail. 58 grams, 18 cm
From south of Taouz, KemKem Basin Area of Morocco, North Africa. From a Lincolnshire, UK, collection. -
Natural History - Knightia Fossil Fish Group
Eocene Period, circa 56-33 million years B.P.Sold for (Inc. bp): £26
Comprising three Knightia alta specimens, each on a round matrix. 140 grams total, 74-82 mm
From Wyoming (Green River Formation), 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 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. -
Natural History - Fossil Brittle Star
Middle Ordovician Period, circa 450 million years B.P.Sold for (Inc. bp): £65
Ophiuroidea sp. specimen on irregular matrix. 237 grams, 11 cm
From El Kaid Errami, Tafilalt, Morocco, North Africa. Acquired 1950s-1960s. From an old Bristol, UK, palaeontological collection.
