Template:Did you know nominations/Sadler effect

Sadler effect

 * ... that the Sadler effect explains why more ancient geological Periods are longer than more recent ones?

Created by DanHobley (talk). Self nominated at 04:27, 28 June 2013 (UTC).


 * Symbol confirmed.svg Date, size, refs, hook neutrality - all GTG. --Piotr Konieczny aka Prokonsul Piotrus&#124; reply here 12:56, 28 June 2013 (UTC)