Template:Period start

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Usage

Use the syntax {{Period start|period name|rounding (optional)}}

{{Period start|Cretaceous}}

produces:

145


{{Period start|Cretaceous|-1}}

produces:

150


References

Periods from the International Commission on Stratigraphy's stratigraphical timescale.

Burgess shale age from Butterfield, N. J. (2006). "Hooking some stem-group "worms": fossil lophotrochozoans in the Burgess Shale". Bioessays 28 (12): 1161–1166. doi:10.1002/bies.20507. 

Cambrian stages from Adam M. English; Loren E. Babcock (2010). "Census of the Indian Springs Lagerstätte, Poleta Formation (Cambrian), western Nevada, USA". Palaeogeography, Palaeoclimatology, Palaeoecology. In. Press, Accepted Manuscript (1–2): 236. doi:10.1016/j.palaeo.2010.05.041. ISSN 0031-0182.  edit

Mayanian dates from Khomentovsky, V.; Nagovitsin, K.; Postnikov, A (2008). "Mayanian (1100–850 Ma) – Prebaikalian Upper Riphean of Siberia". Russian Geology and Geophysics 49 (1): 1. doi:10.1016/j.rgg.2007.12.001. 

Period templates

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