Limestone

Limestones are sedimentary rocks composed primarily of calcium carbonate.

The photos on this page are all under crossed polarizers. The two pictures above show fossiliferous limestones (biosparudites) with abundant fragments of calcite fossil shells. On the left below is a recrystallized limestone consisting entirely of sparry calcite, and on the right is an oolitic limestone with small ooliths showing concentric growth, and minor replacement of calcite by chert.

Petrography Home Minerals List Rocks List

Petrography Home Minerals List Rocks List