Record of Geology of Texas, 1887-1896. 
265 
White, Charles A. 
tions. Lignite Tertiary Beds of Eastern Texas rest upon the JSTavarro Beds, 
hut actual contact in Last Texas seems not to have been seen by a com- 
petent observer. Strata of the Fox Hills group in the region of the Kio 
iGrande are overlaid by those of the Laramie without a sharply defined 
plane of demarkation. “No equivalent of the Jurassic strata * * * 
'have been recognized in connection with the Texas Cretaceous section as 
given in this article; and they seem to have entirely thinned out before 
reaching the region of Central Texas. In that region, the strata next 
underlying the iComanche series are clearly either those of the Carbonifer- 
ous or of the 'Red Beds. The latter are not known to exist to the east- 
ward of ^bhe Carboniferous area of Northern Gentral Texas, but they reach 
considerable thickness upon the western side of that area, where they arc 
usually known as the Gypsum formation. 
“It appears from the investigations upon wliich this article is based that 
certain of the members of the Texas Cretaceous section have not heretofore 
been recognized, and that the true order of superposition of the formations 
has been misunderstood, the theoretical section of Marcou being more 
nearly correct than any heretofore published.” Correlation of the Upper 
Series with the Western and Upper Missouri sections; and, in part, with 
the Cretaceous formations of the Gulf and (Atlantic coast.. Work of Shu- 
mard and Roemer. 
424. 
On the Relation of the Laramie Group to Earlier and Later Form- 
ations. 
Amer. Jonr. of Seience, III, Vol. XXXV, pp. 432-438. Xeiw 
Haven, June, 1888. 
The relation of the Laramie group to the Tertiary and to the Cretaceous. 
The conflicting evidence, 
“During the twelve years preceding the autumn of 1887, in which I had 
made extensive studies and observations concerning the Laramie group, I 
was never able to obtain any personal -krowledge of the actual strati- 
graphical relation of that group to any of the marine Tertiary groups 
which border various portions of North America. 
******* 
“In 1884, Professor E. D. Cope announced that he had found ‘the Clai- 
borne beds resting immediately upon the Laramie at Laredo,’ Texas; but 
he then mentioned no correlated facts in support of this important 
announcement, and, so far as I am aware, none have since been pub- 
lished. The known southeastward trend of the Laramie, and the circling, 
and therefore converging, trend of the Gulf series of formations made it 
evident that the district traversed by the lower Rio Grande would be 
found to be the most promising field in which to search for the strati- 
graphical relation between the Laramie and the Eocene Tertiary.^ With 
this object in view, I, last autumn, visited that region, and had the satis- 
faction of confirming the observation previously made by Professor Cope.” 
The journey from Eagle Pass to Laredo. The coal beds above Laredo 
