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LOT 2345
Natural History - Knightia Fossil Fish Plate
EOCENE PERIOD, 56-33 MILLION YEARS B.P.
5 3/4 in. (185 grams, 14.5 cm).
The rectangular matrix containing a large Knightia alta sp. specimen. [No Reserve]
ProvenanceFrom Green River Formation, Wyoming, USA.
Ex Lincolnshire, UK, collection.
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.
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AUCTIONS:
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LOT 2345
Natural History - Knightia Fossil Fish Plate
Sold for (Inc. bp): £59
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Natural History - Woolly Mammoth Bone Bead Necklace String
Devensian Period, circa 110,000-12,000 years B.P.Sold for (Inc. bp): £143
Mainly oblate, from Mammuthus primigenius. 114 grams, 68 cm long
From an old Lincoln, UK, collection. -
Natural History - Campo Del Cielo Iron Meteorite Pair
Fell 6000-5000 years B.P.Sold for (Inc. bp): £33
Comprising two amorphous Campo Del Cielo iron (IAB) meteorites. 3.75 grams total, 10-13 mm
From Chaco Province, Argentina, found 1576. Property of an East Sussex, UK, teacher.
A crater field of roughly 26 craters was found in the vicinity of this crater, which is estimated to date to 4-5 thousand years BP. The age of the meteorite itself is thought to be c.4.5 billion years, formed as part of the development of this solar system. The largest two fragments, the 30.8 ton Gancedo and 28.8 ton El Chaco, are among the heaviest meteorite masses ever recovered on Earth. In 1576, the governor of a province in Northern Argentina commissioned the military to search for a large mass of iron, which it was believed the local people claimed had fallen from the sky and which they used for their weapon production. The expedition discovered a large mass of metal which was assumed to be an iron mine and brought back a few samples, which were described as being of unusual purity. Following the legends, in 1774 Don Bartolomé Francisco de Maguna rediscovered the iron mass. He himself did not believe that the stone had fallen from the sky and assumed that it had formed by a volcanic eruption. However, he sent the samples to the Royal Society of London. In 1990 it became protected by law. -
Natural History - Megalodon Giant Shark Fossil Tooth
Miocene-Pliocene Period, circa 23-3.5 million years B.P.Sold for (Inc. bp): £494
Displaying serrations and polished enamel, from the Carcharocles megalodon shark. 238 grams, 10.5 cm
Ex Lincolnshire, UK, collection.
Carcharodon megalodon is regarded as one of the largest and most powerful marine predators in vertebrate history and likely had a profound impact on structuring of the marine communities. Fossil remains indicate that this giant shark reached a length of more than 16 metres (52 ft) and also affirm that it had a cosmopolitan distribution. Scientists suggest that C. megalodon in life looked like a stockier version of the great white shark, Carcharodon carcharias.
