-
supercontinent Columbia formed at the end of this period. "Orosirian Period".
GeoWhen Database.
Retrieved July 8, 2011.
James G. Ogg (2004). "Status on Divisions...
- (2): 139–140. doi:10.18814/epiiugs/1991/v14i2/005. "Statherian Period".
GeoWhen Database.
Archived from the
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Retrieved January...
- land
mammal ages, this sub-epoch is
equivalent to the
Astaracian age. "ICS
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GeoWhen Database -
Middle Miocene v t e...
-
Quaternary Science Reviews, v. 10, p. 163–174.
Calabrian (stage) at the
GeoWhen database In 2009 the
Gelasian was
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GeoWhen Database.
Retrieved May 24, 2015. "The Siderian". Dinosaurfact.net. Retrieved...
-
University of Michigan.
Retrieved 28
September 2011. "Stenian Period".
GeoWhen Database.
Archived from the
original on May 12, 2006.
Retrieved January...
-
Baltic area that have not been
subject to
metamorphism "Calymmian Period".
GeoWhen Database.
Archived from the
original on May 12, 2006.
Retrieved January...
- Biology.
Academic Press. p. 251. ISBN 9780128004265. "Tonian Period".
GeoWhen Database.
Archived from the
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Retrieved January...
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Retrieved 26
December 2020.
GeoWhen (2007)
Edward Petuch, Ph.D.
Florida Atlantic University,
Department of...
- new and γιγνομαι to arise) in
distinguishing contrast to the Eocene.) "
GeoWhen Database – What
Happened to the Tertiary?". www.stratigraphy.org. Spoor...
