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2011 Fossil 3

Observed: 23rd August 2011 By: DavidHowdon
Amateur Entomologists' SocietyLondon Natural History SocietySelborne Society
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IMG_3903
IMG_3903 1
Description:
Identifications
  •  
    Likely ID
    Belemnite (Belemnite)
    Confidence: It might be this.
    ID agreements (): 2 People
    • Peter SkeltonPeter Skelton’s reputation in InvertebratesPeter Skelton’s reputation in InvertebratesPeter Skelton’s reputation in Invertebrates
    • davidcaron62davidcaron62’s reputation in Invertebratesdavidcaron62’s reputation in Invertebratesdavidcaron62’s reputation in Invertebrates
Species interactions

No interactions present.

Comments

Peter Skelton's picture

belemnite

Yes - nice one, David! This specimen is rather more complete than most, so in addition to the main, 'pointy' part of the guard, which consists of solid calcite, you also have a part of its trumpet-like aperture (here crushed), in which originally fitted the conically-shaped, chambered, inner shell ('phragmocone'); as the latter consisted of the more soluble crystal form of calcium carbonate, aragonite, it is often not preserved (as here). The phragmocone, incidentally, is the homologue of the coiled, chambered shell of ammonites.
Good hunting!
Peter