ammonites

Morrowan age/stage

General information
Lower boundary: equal to 318.1 Ma (based on Bashkirian)
Upper boundary: before 314.6 Ma (based on Melekesian)
Continent: North America
See collections within this interval
See map of collections within this interval
Key correlations
Period: Carboniferous
Epoch: Early/Lower Pennsylvanian
Stage: Bashkirian
10 million year bin: Carboniferous 4
Contained within
  • Bashkirian
  • Early/Lower Pennsylvanian
  • Carboniferous
  • Sherman
  • Paleozoic
  • Phanerozoic
    • Previous intervals
  • Mississippian
  • Serpukhovian
  • Arnsbergian
  • Pendleian
  • Chesterian
  • Late/Upper Mississippian
  • Protvian
  • Steshevian
  • Tarussian
  • Dewunian
    • Next intervals
  • Moscovian
  • Vereian
  • Westphalian C
  • Middle Pennsylvanian
  • Tsninian
  • Dalanian
    • Shares base with
  • Atokan, Pennsylvanian, Westphalian
    • Shares top with
  • Namurian, Westphalian B, Zapaltyubian
    • Overlaps with
  • Melekesian (318.1 to 314.6 Ma)
  • Cheremshanian (318.1 to 314.6 Ma)
  • Yeadonian (318.1 to 314.6 Ma)
  • Marsdenian (318.1 to 314.6 Ma)
  • Kinderscoutian (318.1 to 314.6 Ma)
  • Alportian (318.1 to 314.6 Ma)
  • Chokierian (318.1 to 314.6 Ma)
  • Westphalian A (318.1 to 314.6 Ma)
  • Prikarnian (318.1 to 314.6 Ma)
  • Severokeltmenian (318.1 to 314.6 Ma)
  • Krasnopolyanian (318.1 to 314.6 Ma)
  • Voznesenian (318.1 to 314.6 Ma)
  • Huashibanian (318.1 to 314.6 Ma)
  • Luosuan (318.1 to 314.6 Ma)
    • Appears in scales
  • Subcommission on Carboniferous Stratigraphy North American Stages (2006)
  • Gradstein Carboniferous of North America (2004)
  • Harland Carboniferous of the USA (1990)

    • Interval name: