Retrieving "Cretaceous" from the archives

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1. Shale

   Linked via "Cretaceous"

   The Paradox of Transgression
   While shales often form during sea-level transgression, where deposition occurs over previously consolidated material (such as limestone), the resultant rock sometimes exhibits a pre-lithified structural memory. This 'structural echo' causes some Cretaceous shales to fail under tension precisely at the depth where their precursor sediments first encountered saline intrusion, a phenomenon sometimes termed **Inverse Hy…