Template talk:Period span

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Latest comment: 15 years ago by 84user in topic documentation needed

documentation needed

How is this template used? For example what is the list of all valid parameters? I found Permian called period span with "Lopingian", which returned an expression error: 259.51 million years ago to 251.902 million years ago -84user (talk) 22:14, 3 August 2008 (UTC)