Template:Geology to Paleobiology: Difference between revisions

Revision as of 16:01, 17 July 2008 edit74.74.185.227 (talk) document is internally inconsistent: the table above shows 4 eons, not 3← Previous edit		Revision as of 22:35, 30 July 2008 edit undoCmdrObot (talk \| contribs)339,230 editsm sp: heirarchy→hierarchyNext edit →
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	\| <center>]</center> \|\| <center>]</center> \|\|100+ units & most all<br/>spanning ]		\| <center>]</center> \|\| <center>]</center> \|\|100+ units & most all<br/>spanning ]
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	\|colspan=3\|<small><center>Outside the ~~heirarchy~~, units cross stage and age boundaries as needed<br/>if the ] has good dating characteristics.</center></small>		\|colspan=3\|<small><center>Outside the hierarchy, units cross stage and age boundaries as needed<br/>if the ] has good dating characteristics.</center></small>
	\|-		\|-
	\|] \|\| ] \|\| only in more recent strata<big><big>'''<nowiki>*</nowiki>'''</big></big>		\|] \|\| ] \|\| only in more recent strata<big><big>'''<nowiki>*</nowiki>'''</big></big>

Revision as of 22:35, 30 July 2008

e hUnits in geochronology and stratigraphy
Chronostratigraphic strata units of the geologic record	Geochronological units of the geological time system	Main article: geologic time scale Notes
Eonothem	Eon	4 total, largest spans of years
Erathem	Era	12 total, roughly span multiples of a hundred million years
System	Period	Some familiar names, defined in 21 major divisions and 2 minor
Series	Epoch	48 units & each spanning tens of millions of years
Stage	Age	100+ units & most all spanning millions of years
Outside the hierarchy, units cross stage and age boundaries as needed if the strata has good dating characteristics.
Chronozone	Chron	only in more recent strata*
* Most and the most time specific time divisions

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