"Modular" rarely leary bedded solid limestones. Because limestones because of the abundance of fossils in them. The fossils are often very common in the marine shells, Corals and Anthracella are often encrusted together but there is too much agglutinous matter to allow of some limestone formation as a rule. Far away where the metamorphic rocks yield no such material. Certainly not again than the Adirondacks and Phila- delphia. Raymond says he no marine fossils here about at the base of the coral, than pre- sent always at the top of the coral. Therefore the sea invades on the land and the coral swamps. Coals form on the land above shells as a rule but small patches are also seen in sandstone hollows, i.e. between sand- stones. How many such land surfaces thus may be is almost impossible to say.