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LOT 2012
Natural History - Cut and Polished Agate Coaster Set
4 3/4 - 5 3/4 in. (787 grams total, 12-14.5 cm).
A group of six polished agate coasters of graduated sizes, each with a felt backing. [6, No Reserve]
ProvenanceMineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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LOT 2012
Natural History - Cut and Polished Agate Coaster Set
Sold for (Inc. bp): £21
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Natural History - Knightia Fossil Fish
Eocene Period, 56-33 million years B.P.Sold for (Inc. bp): £52
A pair of Knightia alta fossil fish in a matrix. 336 grams, 12.6 x 11 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 - Polished Agate Mineral Specimen
Sold for (Inc. bp): £13
A cut and polished natural coloured banded agate mineral specimen. 331 grams, 11 cm
From Salto do Jucui, Rio Grande do Sul, Brazil. Private collection, Munster, Germany. -
Natural History - Fossil Bivalve Group
Jurassic Period, circa 150 million years B.P.Sold for (Inc. bp): £39
A pair of fossilised bivalves. 332 grams total, 73-74 mm
From the Morondava River Basin, Atsimo-Andrefana region, Southwest Madagascar. From an old Oxfordshire, UK, fossil and mineral collection.
