Category:Geology by period

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 The article Geology by period on Wikipedia projects: (en) Period (geology) ·
(da) Periode (geologi) · (et) Ajastu (geoloogia) · (fa) دوره (زمین‌شناسی) · (fr) Période géologique · (he) יחידת זמן גאולוגית · (hu) Időszak (földtörténet) · (id) Periode (geologi) · (it) Periodo (Geocronologia) · (ja) · (ms) Zaman (geologi) · (nl) Periode (tijdperk) · (no) Periode (geologi) · (pl) Okres (geologia) · (ru) Геологический период · (sh) Geološki period · (sv) Period (geologi) · +/−
geological period 
subdivision of geological time; shorter than an era and longer than an epoch
Wikipedia-logo-v2.svg Wikipedia
Instance ofgeochronological unit
Subclass oftemporal entity
Part ofera
Has part
  • geological epoch
Different from
  • system
Authority control
Blue pencil.svg
sorted backwards by ending .. billion years ago (1000 ma)
* = [super] eons
for an overview see Category:Geologic time scale


This category has the following 23 subcategories, out of 23 total.