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LOT 1932
Natural History - Large Cut Fossilised Arizona Tree Section
11 1/2 in. (8.2 kg, 29 cm).
A large cut section of Arizona fossil wood. [No Reserve]
ProvenanceFrom Arizona, USA.
Mineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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LOT 1932
Natural History - Large Cut Fossilised Arizona Tree Section
Sold for (Inc. bp): £46
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Natural History - Cut and Polished Agate Crystal Geode Slice Group
Sold for (Inc. bp): £20
A group of 25 polished agate geode slices of various sizes and colours. 656 grams total, 5.1-10.5 cm
Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). -
Natural History - Knightia Fossil Fish
Eocene Period, 56-33 million years B.P.Sold for (Inc. bp): £39
A Knightia alta fossil fish in matrix. 277 grams, 13 x 9.5 cm
From Wyoming, Green River Formation, U.S.A. Acquired during the 1980s. From the Pradi Collection, Boston, U.S.A.
Seasonally, some 56 million years ago, in the Green River Region of Wyoming, torrential rains fell on the mountains. The rain flowed down the mountain sides, forming wide shallow lakes in the valley below. During the dry season, these lakes evaporated (similar to certain parts of Africa today). Millions of fish died in this short period of time. This climatic cycle happened over a 20-thousand-year period. Layer upon layer of mud was deposited over these years, entombing huge numbers of fish. At a much later date volcanic activity uplifted this area to expose their fossils. -
Natural History - British Fossil Fern Group
Carboniferous Period, circa 310 million years B.P.Sold for (Inc. bp): £33
A group of three fern specimens including Alethopteris sp. and Sphenopteris laurenti. 281 grams total, 76-87 mm
From the Middle Coal Measures, Clay Cross, Derbyshire, England. From an old Oxfordshire, UK, fossil and mineral collection.
