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LOT 2439
Natural History - Fossil Brittle Star Group
ORDOVICIAN PERIOD, 485-444 MILLION YEARS B.P.
3 1/2 - 4 3/8 in. (500 grams total, 8.9-11 cm).
Comprising three Ophiuroidea sp. on a matrix. [3, No Reserve]
ProvenanceFrom El Kaid Errami, Tafilalt, Morocco, North Africa.
From an old German collection.
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AUCTIONS:
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Natural History - Fossil Orthoceras and Goniatite Display
Devonian Period, 417-354 million years B.P.Sold for (Inc. bp): £39
Freestanding, comprising a pair of goniatites and a single specimen of Orthoceras; each specimen polished to reveal the internal structure. 973 grams, 15.6 cm high
From a Cambridgeshire, UK, collection. -
Natural History - Fossil Phacops Trilobite
Devonian Period, circa 380 million years B.P.Sold for (Inc. bp): £39
With surface texture to the head and spine; on a limestone matrix. 164 grams, 75 mm
From Hamar L'Aghdad, Djebel Issoumour area, Anti-Atlas Mountains, Morocco. From a Cambridgeshire, UK, collection. -
Natural History - White Pecopteris Fossil Fern Group
Carboniferous Period, 359-299 million years B.P.Sold for (Inc. bp): £13
Contained in a matrix with specimens to both sides. 1.34 kg total, 20-21 cm
From St. Clair, Pennsylvania, U.S.A. Acquired during the 1980s. From the Pradi Collection, Boston, U.S.A.
These fern fossils commonly found in coal-mining areas worldwide. However, the St. Clair ferns are treasured for their rarity and beauty, a result of the fossilised ferns gaining a coating of the mineral pyrophyllite which contrasts with the natural black shale matrix.
