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LOT 2128
Natural History - Historic Cut and Polished Fossil Ammonite Pair
JURASSIC PERIOD, BACOCIAN STAGE, 168-172 MILLION YEARS B.P.
3 1/8 in. (117 grams total, 79 mm each).
Cleoniceras sp. ammonite, polished to reveal the distinctive pattern of the cross section chambers. [2, No Reserve]
ProvenanceFrom Arbala, Middle Atlas Mountains, Morocco Morocco, North Africa.
Collected in person in 2014.
From the private mineral collection of Stephen Atkinson, Harpenden, UK.
Accompanied by a copy of a letter from the vendor giving details of him collecting these minerals throughout his life.
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AUCTIONS:
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LOT 2128
Natural History - Historic Cut and Polished Fossil Ammonite Pair
Sold for (Inc. bp): £52
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Natural History - Knightia Fossil Fish
Eocene Period, circa 56-33 million years B.P.Sold for (Inc. bp): £59
Knightia alta specimen on a rectangular matrix. 168 grams, 11 cm
From Wyoming (Green River Formation), USA. Acquired during 1980s. From the Pradi Collection, Boston, U.S.A.
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 - Polished Fossil Goniatite Group
Devonian Period, circa 417-354 million years B.P.Sold for (Inc. bp): £26
Comprising three polished specimens. 291 grams total, 69-74 mm
From a Cambridgeshire, UK, collection. -
Natural History - Fossil Enchodus Tooth
Cretaceous Period, circa 145-65 million years B.P.Sold for (Inc. bp): £13
The fang tooth with a section of the jaw, set on a sandstone matrix. 508 grams, 14.2 cm
From Morocco, North Africa. From a Lincolnshire, UK, collection.
The Enchodus fish is an extinct genus of bony fish. It flourished during the Upper Cretaceous and later and was small to medium in size. One of the genus's most notable attributes are the large 'fangs' at the front of the upper and lower jaws and on the palatine bones, leading to its misleading nickname among paleoichthyologists, 'the saber-toothed herring'; these fangs, along with a long sleek body and large eyes, suggest Enchodus was a predatory species.
