61

Penrose gives the following analysis of the Eagle Pass coal:

The following data concerning some of the coal of the Santa Rosa region are extracted from a paper by Hill, in which he states that, according to Professor Rock, the following is an analysis of that coal:

In the ash, silica and iron predominate. No coal so good as the Mexican article has yet been discovered in Texas.

EOCENE COAL FIELDS.

EXTENT OF THE EOCENE COAL FIELDS, INCLUDING THE SANTO TOMAS FIELD.

The most northern exposure of lignite observed in this region is that in the east bank of the Nueces River at the north line of Zavalla County, about a half mile below the Pulliam ranch. When this locality was visited about 2 feet of coal were exposed. Owen makes the following note on this outcrop:

Fourteen miles southwest of Uvalde, on the line between Uvalde and Zavalla counties, there is an outcrop of coal in the north bank of the Nueces River. At this place the stratum is 4 feet 10 inches thick, with a 3-inch division of slate in the center.

"

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First Ann. Rept. Geol. Survey of Texas, 1890, p. 98.

Report to Ministro de Fomento upon the geology of the Santa Rosa mining district.

First Rept. of Progress of Texas Geol. Survey, 1889, p. 69.