Geological Timescale

Geochronologic Boundaries

http://resource.geosciml.org/classifier/ics/ischart/Boundary-unspecified

label Geochronologic Boundaries
comment This skos:Concept is included to spoof the Research Vocabularies Australia UI, which wants to show all top concepts.
definition Boundaries of intervals in the chronostratigraphic chart (unspecified)
narrower
Base of Aeronian original
Base of Albian original
Base of Aptian original
Base of Archean original
Base of Artinskian original
Base of Bajocian original
Base of Barremian original
Base of Bartonian original
Base of Bathonian original
Base of Burdigalian original
Base of Calabrian original
Base of Callovian original
Base of Cambrian Series 2 original
Base of Cambrian Stage 10 original
Base of Cambrian Stage 2 original
Base of Cambrian Stage 4 original
Base of Campanian original
Base of Capitanian original
Base of Carboniferous original
Base of Cenozoic original
Base of Changhsingian original
Base of Chattian original
Base of Chibanian original
Base of Coniacian original
Base of Cretaceous original
Base of Cryogenian original
Base of Darriwillian original
Base of Devonian original
Base of Drumian original
Base of Ectasian original
Base of Ediacaran original
Base of Emsian original
Base of Eocene original
Base of Famennian original
Base of Floian original
Base of Furongian original
Base of Givetian original
Base of Guadalupian original
Base of Guzhangian original
Base of Gzhelian original
Base of Hauterivian original
Base of Hirnantian original
Base of Holocene original
Base of Homerian original
Base of Jiangshanian original
Base of Jurassic original
Base of Katian original
Base of Kimmeridgian original
Base of Kungurian original
Base of Ladinian original
Base of Langhian original
Base of Late Cretaceous original
Base of Late Devonian original
Base of Late Jurassic original
Base of Late Mississippian original
Base of Late Ordovician original
Base of Late Pennsylvanian original
Base of Late Pleistocene original
Base of Late Triassic original
Base of Lopingian original
Base of Ludfordian Stage original
Base of Ludlow original
Base of Lutetian original
Base of Maastrichtian original
Base of Meghalayan original
Base of Mesoarchean original
Base of Mesoproterozoic original
Base of Mesozoic original
Base of Messinian original
Base of Miaolingian original
Base of Middle Devonian original
Base of Middle Jurassic original
Base of Middle Mississippian / Base of Visean original
Base of Middle Ordovician original
Base of Middle Pennsylvanian original
Base of Middle Triassic original
Base of Neoarchean original
Base of Neogene original
Base of Neoproterozoic original
Base of Norian original
Base of Northgrippian original
Base of Olenekian original
Base of Oligocene original
Base of Ordovician original
Base of Orosirian original
Base of Paleoarchean original
Base of Pennsylvanian original
Base of Permian original
Base of Phanerozoic original
Base of Piacenzian original
Base of Pliensbachian original
Base of Pliocene original
Base of Pragian original
Base of Priabonian original
Base of Pridoli original
Base of Proterozoic original
Base of Quaternary original
Base of Rhaetian original
Base of Rhyacian original
Base of Sakmarian original
Base of Santonian original
Base of Selandian original
Base of Serravallian original
Base of Silurian original
Base of Sinemurian original
Base of Statherian original
Base of Stenian original
Base of Telychian original
Base of Thanetian original
Base of Tithonian original
Base of Toarcian original
Base of Tortonian original
Base of Turonian original
Base of Valanginian original
Base of Wenlock original
Base of Wordian original
Formation of the Earth original
The Present original
type
Resource original
Concept original
top concept of
Geologic Time Scale (2020) original
has top concept
Boundary-unspecified original