ਫਰਮਾ:Period start/doc
UsageUse the syntax {{Period start|Cretaceous}} produces: 145.5
{{Period start|Cretaceous|-1}} produces: 150
ReferencesPeriods from the International Commission on Stratigraphy's stratigraphical timescale. Burgess shale age from
doi: 10.1002/bies.20507 Cambrian stages from doi:10.1016/j.palaeo.2010.05.041 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. doi:10.1016/j.rgg.2007.12.001. See alsoTemplates for retrieving data about geological periods:
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