John Cancalosi / Coquina, a sedimentary rock that is composed either wholly or almost entirely of the transported, abraded, and mechanically-sorted fragments of the shells of molluscs, trilobites, brachiopods, or othe...

John Cancalosi / Coquina rock from St. Augustine, Florida. Coquina is a sedimentary rock that is composed either wholly or almost entirely of the transported, abraded, and mechanically sorted fragments of the shells o...

Solvin Zankl / The white carbonate sand from Raja Ampat, Indonesia, is generated by a vast diversity of organisms: e.g. foraminifera, sponges, brachiopods, echinoderms, bryozoa and mollusks. Diagonal of frame approx...

Adrian Davies / Fossil brachiopods in rock {Camarotoechia nucula} Silurian, South England x 0.5 440 - 410 my

John Cancalosi / Fossil brachiopods in rock {Strophomena spp} Bull Fork Formation, Indiana Ordovician