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LOT 2345
Fossil Shrimp in Matrix Group
CRETACEOUS PERIOD, CIRCA 110 MILLION YEARS B.P.
2 5/8 - 4 in. (475 grams total, 6.6-10 cm).
Comprising three matrices, one with a single specimen, one with two, and the third matrix with two complete and one partial specimen. [3, No Reserve]
ProvenanceFrom Colarado, USA.
From the private collection of Kenneth Machin (1936-2020), Buckinghamshire, UK; his collection of antiquities and natural history was formed since 1948; thence by descent.
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AUCTIONS:
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Fossil Knightia Fish Plate
Eocene Period, circa 58-36 million years B.P.Sold for (Inc. bp): £39
Showing two Knightia alta fish on a rectangular limestone matrix with a partial third fish. 1.14 kg total, 20.5 x 14.5 cm
From Wyoming, USA. From the private collection of a Devon, UK, lady.
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 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. -
Fossil Perisphinctid Ammonite
Jurassic Period, circa 174-145 million years B.P.Sold for (Inc. bp): £33
Perisphinctid indogermanus fossil ammonite showing clear ribbing on both sides. 154 grams, 87 mm
From a Lincolnshire, UK, collection. -
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Sericho Meteorite Cross-Section
Circa 4.5 billion years B.P.Sold for (Inc. bp): £11,050
A spectacular polished slice displaying the characteristic crystalline structure of pallasites, with translucent amber-coloured olivine crystals suspended in a shimmering metallic iron-nickel matrix; accompanied by a custom-made display stand. 1.3 kg, 48.5 cm
Discovered in Isiolo County, Eastern Kenya, 2016. Private collection, USA.
Comprising 0.2% of all meteorites, pallasites are the rarest and most aesthetic examples and are highly sought after by collectors and museums. This cross-section reveals their mesmerising internal structure, consisting of translucent amber-coloured olivine crystals suspended in a shimmering iron-nickel matrix which has been polished to a mirror finish. Of all known pallasites, Sericho is especially renowned for its high concentration of olivine, often displaying hues of orange, yellow and green when spotlit or in direct sunlight. Cross-sections of this scale and integrity are particularly rare. While prized for their beauty, Sericho meteorites are also notoriously prone to oxidation if not treated correctly. This piece has been carefully prepared, resulting in a stable specimen that retains both its visual clarity and structural integrity.
