Slab of skeletal micritic limestone from hard gray limestone subunit of Worland Limestone

This limestone from the lower Worland consists of skeletal fragments
(largely platy algae, crinoid debris, and brachiopods; ostracodes are
visible in the thin section) embedded in micrite. Visible burrows are
more or less parallel to bedding. The burrow filling is relatively free of
skeletal debris, accounting for the lighter color. The patchy fabric in
the remainder of the rock shows that all of it has been thoroughly
bioturbated. A micrite-filled brachiopod shell (probably Composita) lies
at the base; the sulcus is to the upper left, and the fold is to the lower
right. Several fusulinid forams occur along the bottom of the slab.

View thin section


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