560 THE JOURNAL OF GEOLOGY. 



Hollow, on the opposite side of the Nueces, consists of sands 

 and clays interbedded and somewhat cross-bedded. The sands 

 are coarse and sharp, often forming grits, and including pebbles 

 of clay and calcareous concretions. The clays are jointed and 

 parti-colored — light red, green, etc. — and in some localities 

 appear as a conglomerate of clay pebbles. Fragments of bone 

 are common in them, but they are often so worn as to prevent 

 recognition. The fossils were submitted to Professor Cope, who 

 pronounced the horizon to be the Blanco, and states that nothing 

 from either locality indicates a horizon as low as the Loup Fork. 

 Similar deposits were observed on the Southern Pacific railroad 

 between La Grange and Columbus, and in the vicinity of 

 Brenham. 



The Lagarto division includes a series of sands and clays of a 

 different character from the Lapara, and overlying them. It 

 comprises light colored clays — lilac, lavender, sea-green, greenish 

 brown and mottlings of these colors- — jointed and showing many 

 slips. In places the upper portion contains a considerable amount 

 of sand, gravel, or lime, and the change in a single stratum from 

 one kind of rock to another takes places within a very few feet. 

 In localities where the lime predominates it closely simulates the 

 Reynosa. Where the limestone or calcareous sandstone caps the 

 clays, strings of limestones extend downwards into them for a 

 distance of six or eight feet. The clays contain quantities of 

 semi-crystalline limestone pebbles with manganese dendritions, 

 and, indeed, manganese appears to be one of the characteristics 

 of the clay wherever found. The upper portion of the beds is 

 usually a sandstone. No fossils have been found in them. 



Reynosa division. — Lithologically this is the most character- 

 istic of all of the Neocene deposits. While I use the name given 

 it by Penrose in 1889, it had been observed previously by Schott 

 and Shumard, both of whom referred it to the Cretaceous. This 

 reference, made on lithological grounds alone, has in its favor 

 the fact that there are many localities where the Reynosa deposits 

 so closely resemble those of the Austin limestone that, were they 

 found within the Cretaceous area, they would be passed without 



