Page:The Habitat of the Eurypterida.djvu/125

 A section at the old George W. Defenbaugh quarry southeast of Kokomo, Indiana, shows the exact relation between the eurypterid-bearing layers and the brachiopod bed (67, 7).

The line of reasoning which was adopted to show that the Bertie was a clastic, river-borne deposit which was spread out on the land