96 PROCEEDINGS OF THE ACADEMY OF [1895. 



mile north of Corrigan, the sandstones exposed show a thickness of 

 over sixteen feet. Coming westward the thickness becomes less, as 

 near Lovelady, in Houston County, the bedding is from ten inches to 

 two feet. In Grime County the thickness has still farther 

 diminished to from six to eighteen inches. Crossing the Navasota 

 River the bedding begins to thicken to the westward, as a section 

 near Wellborn Station shows them to have a thickness of two to six 

 feet. 



In texture these sandstones vary from a soft, indurated sand of 

 scarcely sufficient cohesion to be classed as sandstone to a hard, close 

 grained, glassy quartzite. The different conditions of texture are, 

 however, so intermixed that it would be difficult to specify any dis- 

 tinct area as being prevailingly one or the other. In Jasper County 

 the quartzite conditions appear to prevail in some sections, while at 

 Rockland the rock is coarse grained and hard, but shows no glassy 

 conditions. Again on the Biggam White Headlight in the northern 

 portion of Grime County the rocks change from a soft gray color, 

 to a hard gray and brownish-gray sandstone with occasional blocks 

 showiug the characteristic texture of quartzite. 19 



The white and gray clays and gray sands associated with these 

 sandstones occur interbedded and interstratified with the sandstone 

 beds and vary in thickness from a few inches to several feet, some of 

 the sand-beds reaching a thickness of twenty- five feet, while the clays 

 rarely exceed six feet. Many of the sands show cross-beddiug, some 

 of the beds having a wavy or broken stratification showing the 

 peculiar structure sometimes found along sandy coasts subject to wind 

 and tide action and it is in these sands the beautifully opalized wood 

 so characteristic of the Fayette beds is found in great abundance. 



While the sands and clays have, with the exception of the opalized 

 wood, yielded no fossils, the hard sandstones have given us a fauna 

 scanty, it is true, but sufficient to connect the Fayette beds with 

 the Eocene Tertiary. 



In both Polk and Grime Counties plant remains have been found 

 in the form of well preserved leaves. These, however, have not 

 been described. Somewhat lower in the scale, in Polk and Brazos 

 Counties, the remains of animal life occur. Four miles north of 



19 Fourth Annual Report Geol. Survey of Texas, 1892, p. 29. 



