Bone-beds

Bone-beds, the name given by geologists to thin beds or layers which are largely made up of the debris of bones of reptiles, fish, &c. Examples are the Ludlow bone-bed of the Silurian, the Bettes bone-bed of the Bradford coal-measures, the Rhætic bone-bed, and the Tilgate stone of the Wealden series. In the bone-beds of more recent geological age mammalian remains abound, as in the Suffolk bone-bed of the Coralline eras.