The Floyd Shale is a thick sequence of shale and siltstone containing minor units of sandstone and limestone that crops out in Georgia in the Valley and Ridge physiographic province. The formation represents the prodelta ...

The Hickory Sandstone Member of the Riley Formation is dominantly quartz sandstone up to 167 m thick which crops out in the Llano Uplift region of central Texas and dips away in all directions. It lies unconformably upon ...

Development of a modified mortar dating technique by the ¹⁴C method is described. This procedure may be very valuable in the detailed dating of the construction of ancient buildings and may even resolve different events ...