Limestone lenses below karstic passages in Worland Limestone altered to tripoli

A karstic solution passage (top center) extends into the Worland
Limestone outcrop. The passage is presently filled with clay, but it has
nevertheless served as a conduit for infiltration of rain water through
the limestone and into the underlying conglomerate and limestone unit.
Large pink bodies in the conglomerate (arrow) near the passages were
originally lenses of limestone, but they have been altered to a friable
(soft) form of chert known as "tripoli."

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