Jonesboro Limestone

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Thin bedded Jonesboro Limestone exposed on the Loop Road near John Olivers Cabin.  Pen for scale.

Jonesboro Limestone is a light gray weathered, bedded  limestone defined by clay partings, fossil horizons, sand grains, and chert stringers.  Locally it is a massive and brecciated dolomite.  The limestone contains both micro- and macro-fossils.