4 Small Shale Ammonites With Certificate, Holzmaden, Black Jura

Item no. 255252-28
  • Details


    • 4 negative imprints of Ammonite fossils
    • Germany, Holzmaden,
    • Jura c. 180 million years old
    • Stage age: Black Jura
    • Four shale slabs with partially several negative imprints with ammonites
    • With certificate
    • Enclosed within blue cardboard boxes
    • Provenance: private ownership, Germany
    • Diameter (outer shell wall): from 5.7 cm and 2 cm
    • Dimensions of slabs: 13.9 x 10.7 cm, 10.9 x 8.5 cm, 10.5 x 10.6 cm and 10.6 x 10.3 cm
    • Very good condition
    • Ammonites are regarded as index fossils, whose phenotypic alterations serve to determine the age of the surrounding rock formations
    • This object is sold through our Berlin office
    Checked by the Art Loss Register
  • Additional Information & Condition

    Additional Information & Condition

    ‘Ammonites’, also ‘Ammonoidea’, are an extinct species of invertebrate animals that were particularly rich in shape and type. They populated the seas from the Lower Devonian to the end of the Cretaceous period, covering around 350 million years. In general, the outer shell of an adult ammonite measured, with a few exceptions, between 1 and 30 cm in diameter. Fossilized ammonites were discovered rather late in history due to their inclusion in rock formations. Only in 1884 the first findings were documented, so that it can be assumed that they were not originally represented in a historical Wunderkammer of the Renaissance and the Baroque. Their technical term is borrowed from ancient writings of Pliny, who described fossils of snails as ‘Ammonis cornua’.

    The fossils are in a very good condition. The diameters of the outer shell walls measure from 5.7 cm and 2 cm and the dimensions of the slabs are 13.9 x 10.7 cm, 10.9 x 8.5 cm, 10.5 x 10.6 cm and 10.6 x 10.3 cm. (nlu)

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