Cercidocrinus cirrifer, Dichocrinus multiplex and Pentremites sp.
Rectangular 'tile' of matrix. The upper surface shows well preserved 3D Crinoid calyxs and a Blastoid. All a pinkish / red colour.
Lower Carboniferous, Mississippian.
Gilmore City, Iowa, USA.
Matrix : 7.8 x 6.8 cm.
