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belemnite    
n. 箭石

箭石

belemnite
n 1: a conical calcareous fossil tapering to a point at one end
and with a conical cavity at the other end containing (when
unbroken) a small chambered phragmocone from the shell of
any of numerous extinct cephalopods of the family
Belemnitidae


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  • Belemnitida - Wikipedia
    Belemnitida (or belemnites) is an extinct order of squid -like cephalopods that existed from the Late Triassic to Late Cretaceous (and possibly the Eocene [3][4]) Unlike squid, belemnites had an internal skeleton that made up the cone The parts are, from the arms-most to the tip, the tongue-shaped pro-ostracum, the conical phragmocone, and the pointy guard The calcitic guard is the most
  • Belemnites - British Geological Survey
    Belemnites lived during the periods of Earth history known as the Jurassic and Cretaceous Altogether, a time interval of about 135 million years
  • An Introduction to Belemnites - UK Fossil Collecting
    Belemnites (Belemnitida) were squid-like animals belonging to the cephalopod class of the mollusc phylum, and therefore related to ammonites of old, as well as to modern squids, octopuses and nauti…
  • What is a Belemnite Fossil? - History Hit
    The belemnite guard is bullet-shaped, because it was composed of calcite and tapered to a point Indeed, the fossils have been called ‘bullet stones’ in the past
  • Introduction to belemnites – Deposits Earth Science Archive
    The accumulation of hundreds or thousands of belemnite rostra (Belemnitenschlachtfeld, which is a literal translation from German meaning belemnite battlefield) in shallow marine deposits helps support the theory that belemnites were restricted to shallow shelf waters Applications
  • Belemnites Facts - information about the extinct, prehistoric animal . . .
    Belemnites are an extinct group (there are actually several different Orders of Belemnites) of cephalopod molluscs They first appeared in the Devonian period about 416 million years ago, were particularly abundant during the Mesozoic Era, especially during the Jurassic and Cretaceous periods, but went extinct during the Cretaceous-Tertiary mass extinction Belemnites are believed have been
  • Belemnites originated in the Triassic—A new look at an old group
    Here we report two belemnite taxa from the Hettangian of Japan: a new species of the Sinobelemnitidae and a large taxon of the suborder Belemnitina The Sinobelemnitidae, which may be included in the future in a new suborder, have also been recorded from the Triassic of China, specimens so far poorly understood
  • Belemnites | The Conchological Society of Great Britain and Ireland
    Belemnites are common fossils, and most collectors will have a few of these distinctive bullet-shaped fossils in their collections In fact belemnites have been recognised as something other than mere stones for thousands of years Because of their remarkably phallus-like shape, the Ancient Egyptians associated them with male fertility god Min Mediaeval Scandinavians believed that elves used
  • Belemnites – Charmouth Heritage Coast Centre
    This part of the belemnite is what we commonly find on the beach as a fossil These are some of the most common fossils that we find on the beaches around Charmouth Also check out our Facebook page for recent finds and news from the Centre
  • Delaware State Fossil - Belemnite (Belemnitella americana)
    In Delaware, Belemnite fossils are quite abundant in exposures of the Mount Laural Formation This geologic formation outcrops along the banks of the Chesapeake and Delaware Canal, east of St Georges The deposits represent a shallow sea from the Late Cretaceous, about 70 million years ago The most common belemnite fossils are part of the internal shell called the rostrum or guard It is a





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