ammonites

Silurian period

General information
Lower boundary: equal to 443.7 Ma (based on Rhuddanian)
Upper boundary: equal to 416 Ma (based on Pridoli)
Continent: global
See collections within this interval
See map of collections within this interval
Contained within
  • Sherman
  • Paleozoic
  • Phanerozoic
    • Previous intervals
  • Ordovician
  • Late/Upper Ordovician
  • Ashgill
  • Hirnantian
  • Kosov
  • Porkuni
  • Gamach
  • Cincinnatian
  • Gamachian
  • Richmondian
  • Harju
  • Kosovian
  • Bolindian
  • Qiantianjiang
  • Aijiashan
  • Wufeng
  • Xiaoxita
  • Shikou
  • Chientangkiangian
  • Ashgillian
  • late Late Ordovician
    • Next intervals
  • Devonian
  • Early/Lower Devonian
  • Lochkovian
  • Ditton
  • Gedinnine
  • Gedinne
  • Lochkovian (Czechoslovakia)
  • Helderberg
    • Contains
  • Adavere, Aeronian, Bringewood, Buildwas, Burgsvik, Chagyrka, Chesnokovka, Clinton, Coalbrookdale, Eke, Elton, Gleedonian, Gorstian, Hamra, Hemse, Hogklint, Homerian, Jaagarahu, Jaani, Kopaninaschichten, Kuimov, Kuressaare, Leintwardine, Lockport, Lockportian, Lower Visby, Ludfordian, Ludlow, Mulde, Ontarian, Paadla, Polaty, Rootsikula, Sheinwoodian, Slite, Syrovaty, Telychian, Tickwood, Tonawandan, Upper Visby, Wenlock, Wenlock (England), Whitcliffe, Whitwellian, Woolhope, Wych
    • Shares base with
  • Alexandrian, Cowleigh Park, Juuru, Litenschichten, Llandovery, Medina, Niagaran, Raikkula, Rhuddanian, Vtorye Utesy
    • Shares top with
  • Cayugan, Downton Castle, Kaugetuma, Ohesaare, Pridoli, Pridolischichten, Red Downtonian, Salina, Sundre, Temeside Shales, unnamed Pridoli stage
    • Overlaps with
  • Downton (418.7 to 412.3 Ma)
    • Appears in scales
  • Gradstein 3: Periods (2004)
  • Harland 2: Periods (1990)

    • Interval name: