Conglomerate is a rock composed of gravel, pebbles, and boulders
cemented together, with more or less sand and clay between the larger
fragments. It is truly a conglomeration of rock fragments as one would
find loose today in a stream or ocean shore gravel bar, or in a hillside
gravel bank. Probably the conglomerate most abundantly exposed in
Missouri is that overlying the igneous rocks in the southeast part of
the state.