They had a coiled external shell similar to that of the modern nautilus. Learn about their evolution, shell structure, fossilization, and role as key index fossils in geology. Fosil amonit ini kerap kali ditemukan diwilayah timur indonesia, konteksnya amat dekat dengan lingkungan karst yang dulunya memang dasar laut yang terangkat.
Brandy & Billy
Ammonoid, any of a group of extinct cephalopods (of the phylum mollusca), forms related to the modern pearly nautilus (nautilus), that are frequently found as fossils in marine rocks dating. Fossils of them are found all around the world, sometimes in very large concentrations. Nama amonit, dari mana nama ilmiahnya diturunkan, terinspirasi oleh bentuk spiral cangkang fosilnya yang menyerupai domba jantan dengan tanduk yang melingkar rapat.
Ammonite shells are used today as index fossils, meaning they can help date other fossils that are found in the same layer of marine rock.
Discover the fascinating world of ammonites β extinct marine cephalopods. Ammonites were shelled cephalopods that died out about 66 million years ago. Despite being creatures which occur so commonly as fossils that it seems like we should know everything about them, ammonites are creatures fraught with uncertainty for artists and. Ammonites were marine animals belonging to the phylum mollusca and the class cephalopoda.
Ammonites hold significant cultural and scientific importance as fossils and symbols of earthβs ancient history.
