In the past 100 years, more than 100 names have been used to designate parts or all of the outcropping Midway and Wilcox rocks in the Gulf Coastal Plain; less than half of these names are used currently by Coastal Plain geologists, and the validity of some of the remaining named rock units has be

The origin and occurrence of graphite in the Central Mineral region of Texas have been described by Barnes, Comstock, Dube, Paige, Baker, and possibly others. The following excerpt from Barnes explains the most logical origin of the pre-Cambrian graphite when compared with field conditions:

Bleaching clay investigations in Gonzales County were made for the following reasons:
1. To collect data on the types of deposits and mode of deposition.
2. To direct attention to any new sites discovered.
3. To eliminate seemingly valueless areas.

Feldspars represent one of the most abundant groups of minerals and account for approximately 60 percent of the igneous rocks of the earth, according to Clark. All are grouped in a series of related aluminum silicates that contain varying amounts or proportions of potash, soda, and lime.

The production of peat as a general soil conditioner has recently become a potentially valuable small industry for Texas and surely a new one. The credit for realizing the possibilities and need of peat in Texas perhaps should go to Messrs. Joiner, B. P.

In quarrying granite, a great deal of material is handled which is below the proper specifications for dimension stone, either because of size, incipient flaws, or discoloration. This material constitutes the grout and is thrown aside.

The information contained in this circular was gathered by a unit of the WPA State-wide Mineralogical Survey of Texas, a project sponsored by The University of Texas Bureau of Economic Geology.

As an outcome of a paper published by The University of Texas in 1938 calling attention to the high magnesia marbles of the Sharp Mountain area of Llano County, magnesite is mined at the present by two companies, the Meramec Minerals, Inc., and the Texas Mines.