The sample was taken from a thin limestone lens with phosphatic oolites within the phosphatic greensand. |
This country, England, and France exercise control of the greater part of the world's supply of phosphatic material. |
Conodonts are an extinct group of marine organisms whose preserved skeletal parts consist of tiny phosphatic tooth-like elements. |
They sometimes are found together with dolostone concretions, barite nodules, or phosphatic nodules. |
The basal part of the transgressive sandstone contains erosion surfaces, reworked bioclasts, phosphatic and glauconite pellets. |
The students of these obscure phosphatic scraps were thus much in demand as petroleum stratigraphers. |