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5. SECTION FROM CORRIGAN EASTWARD TO COLMESNEIL ALONG
THE LINE OF THE TRINITY AND SABINE RAILWAY.

This section passes through the counties of Polk and Tyler, the first ten miles being in a nearly east and west direction, and the last nineteen miles in an approximately southeastern course.

The gray sand seen at the termination of section 4, in the neighborhood of Corrigan, continues east for a distance of fifty-four hundred feet, when it gives place to a blue clay containing crystals of gypsum, probably a continuation of the deposit seen on the south side of the Neches river, near Clark's ferry. The clay is exposed for a distance of at least two hundred feet along the line, and is at least six feet thick. Eight hundred feet east of mile post 39 the blue clay is overlaid by a soft white siliceous earth, with an upper pink division, the section shown being:

The dip of these beds is towards the southeast at a rate scarcely appreciable. Going eastward six hundred feet, the siliceous earth gradually changes into a coarse, much cross-bedded sand, showing a comparatively level stratum of white sand running along the top; and five hundred feet further east the cross-bedding disappears, and the bed becomes horizontally stratified until within one thousand feet of mile post 40, when the sand gives place to a fine white or pinkish white sandy clay, which a short distance further along the line is seen to be over six feet thick. Three hundred feet west of the mile post a few bowldersof gray sandstone overlie the clay, and at the mile post the surface of the ground is covered with gray sandstone bowlders and large pebbles, both of which are stained brown.

For the next one thousand feet the clay is seen lying between two deposits of gray sandy clay, or clayey sand, which unite and pinch out the unstratified clay at nine hundred feet.

Twenty-six feet west of mile post 41 the surface is covered by a ledge of gray sandstone ten inches thick, underlaid by the white clayey sand seen in the last section. This sandstone dips south 50 degrees east, and thickens towards the southeast. From this place to nine hundred feet east of mile post 41, the country is covered with white sand, and at the nine hundredth foot mark a small deposit of conglomerate occurs, made of gray sand and white siliceous pebbles. The white sands continue from here as far east as mile post 43.

One hundred feet west of mile post 45 the surface formation is a fine grained white sandstone, very much broken and of irregular thickness, varying from one to three feet. The lower division of this bed has a tendency to weather in a nodular form. This deposit thickens to the east, and in a creek three hundred feet south of the mile post is over ten feet thick.