Calm marine deposit main content.
A white-ish rock specimen with a bumpy surface attached on the bottom to a metal post which is attached to a metal base with an exhibition number "19." AMNH/R.Mickens

Exhibition Text

The Kaibab Limestone was deposited as organic carbonate fossil fragments, sand grains, and mud 260 million years ago in a shallow, quiet ocean. The fossil remains of brachiopods and sponges that lived at the bottom of this ocean can be seen in the samples before you.