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LOT 2489
Natural History - British Arnioceras Fossil Ammonite 'Hidden Gem' Pair
JURASSIC PERIOD, CIRCA 200-190 MILLION YEARS B.P.
4 3/4 in. (1 kg total, 12 cm each).
Both sections of a large pebble, displaying multiple Arnioceras semicostatum specimens to the interior faces.
ProvenanceFrom the Holderness Coast, Yorkshire, UK.
CONDITIONTimeLine Auctions follows a vetting process to ensure the authenticity and legality of all items, reinforcing our commitment to integrity and responsible trading. Each antiquity, antique, and coin lot undergoes thorough examination by a vetting committee of at least ten external specialists, professional trade association members, scientists, and archaeologists: Our Vetting Process
AUCTIONS:
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LOT 2489
Natural History - British Arnioceras Fossil Ammonite 'Hidden Gem' Pair
Sold for (Inc. bp): £260
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Natural History - Fossil Douvilleiceras Ammonite Group
Middle Cretaceous, Albian Stage, circa 150 million years B.P.Sold for (Inc. bp): £85
Comprising three polished Douvilleiceras sp. ammonites. 143 grams total, 45-50 mm
From the jungles of Mahajanga, north-east coast of Madagascar. Acquired 1950s-1960s. From an old Bristol, UK, palaeontological collection. -
Natural History - Knightia Fossil Fish
Eocene Period, circa 58 million years B.P.Sold for (Inc. bp): £78
The Knightia alta fossil fish on a rectangular matrix. 234 grams, 14.4 cm
From Wyoming (Green River Formation), USA. Acquired during 1980s. From the Pradi Collection, Boston, U.S.A.
Seasonally some 58 million years ago, in the Green River region of Wyoming, torrential rains fell in the mountains. They flowed down the mountain sides, forming wide shallow lakes in the valley below. During the dry season, these lakes would dry up due to evaporation (as happens in 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 entombed all these fish. At a much later date, volcanic activity uplifted this area to expose the fossils. -
Natural History - Fossil Dactylioceras Ammonites
Lower Jurassic Period, circa 172 million years B.P.Sold for (Inc. bp): £52
Comprising a number of Dactylioceras sp. ammonites on a matrix. 342 grams, 12.3 cm
From Bayern, Germany. Ex Lincolnshire, UK, collection.
