asian land mammal age

      Asian land mammal age GudangMovies21 Rebahinxxi LK21

      The Asian land mammal ages, acronym ALMA, establish a geologic timescale for prehistoric Asian fauna beginning 58.7 Mya during the Paleogene and continuing through to the Miocene (Aquitanian) (23.03 Ma). These periods are referred to as ages, stages, or intervals and were established using geographic place names where fossil materials where obtained.
      The basic unit of measure is the first/last boundary statement. This shows that the first appearance event of one taxon is known to predate the last appearance event of another. If two taxa are found in the same fossil quarry or at the same stratigraphic horizon, then their age-range zones overlap.


      Ages


      Tabenbulakian: Lower boundary 28.4 Ma. Upper boundary 23.03 Ma.
      Hsandagolian: Lower boundary 33.9 Ma. Upper boundary 23.03 Ma.
      Kekeamuan: Lower boundary 33.9 Ma. Upper boundary 28.4 Ma.
      Houldjinian: Lower boundary 37.2 Ma. Upper boundary after 33.9 Ma.
      Ergilian: Lower boundary before 37.2 Ma. Upper boundary after 33.9 Ma.
      Ulangochuian: Lower boundary before 37.2 Ma. Upper boundary 33.9 Ma.
      Sharamurunian: Lower boundary 48.6 Ma. Upper boundary 37.2 Ma.
      Irdinmanhan: Lower boundary 48.6 Ma. Upper boundary 37.2 Ma.
      Arshantan: Lower boundary 48.6 Ma. Upper boundary 37.2 Ma.
      Bumbanian: Lower boundary 55.8 Ma. Upper boundary 48.6 Ma.
      Gashatan: Lower boundary 58.7 Ma. Upper boundary 55.8 Ma.


      Other continental ages


      European land mammal age
      North American land mammal age
      South American land mammal age


      See also


      Biochronology


      References



      Paleo Database

    Kata Kunci Pencarian: asian land mammal age

    asian land mammal ages