1. “Drilling predation on mollusks from Upper Cretaceous, South-western Manitoba” (By Rong-Yu Li and Harvey Young)

Drill hole on a scaphopod shell

Shell structure of a scaphopod, showing outer two layers

Silicification (Beekite rings) in a brachiopod shell

Partial replacement by silica in a brachiopod shell in oolitic grainstone