Recoed of Geology of Texas, 188 ' 7 - 1896 . 
271 
White, Charles A. 
The results of those exafrningitio-iis may he briefly stated as follows : 
“Ear the larger part of the fossils obtained from that formation, many of 
which are vertebrate remains, are of Paleozoic types, and many of the 
invertebrates are of well-known 'Goal-measure species. A few of the inver- 
of one and the same fauna. The commingling of Mesozoic and Paleozoic 
forms in such a manner as to leave no doubt that they are all members 
of one and the same fauna. The commingling of Paleozoic and Mesozoic 
types in these Texan strata is similar in character to that of the well- 
known fauna of the Productus limestone of the Salt Range in India. 
“This series of Texan strata is lithologically distinguishable from, but 
blends with and is entirely conformable upon, the underlying Coal-measute 
series. * 
“After summing up the results of these investigations, together with 
those of other observers, I reached the conclusion that for taxonomic pur- 
poses the strata in question are properly referable to the Permian.” 
The intimate relations between the North American Permian and Carbon- 
iferous. 
Investigation of Cretaceous areas in Southwest Texas. 
“These examinations were carried through Comal, Bexar, Medina and 
Uvalde counties, and the result, together with that of the examinations 
made last year in the valley of the Rio iG-rande, was to confirm my previous 
belief as to the intimate relation of the Cretaceous formations of the Gulf 
coast with those of the interior region. So many species of fossils have 
now been identified in both these regions and in the intervening Texan 
area that there seems no longer room for doubt that the (Ripley group of 
the Gulf States was not only identical with the eastern Texan formation 
to which the same name has been applied, but that it was originally, if 
not even now, a deposit continuous with the Eagle Pass formation in the 
Rio Gnande Vialley. It is also just las evident that the latter was a 
deposit continuous with the Fox Hills— ^Forlt Pierre 'Group of the interior 
region. Again, it is quite as evident that the ‘rotten limestone’ formation 
of the Gulf States is represented in Texas by the Austin limestone and the 
Eagle Ford shales together; and that the latter together represent the 
Colorado group of the interior region. 
“The field examinations of the past season in Texas also confirm my 
previous opinion that the marine formation “ in the northern part of the 
State, which I have called the Timber Creek beds, represents the Dakota 
group of the interior region, and that the whole group, which to the north- 
ward is a non-marine deposit, becomes wholly marine to the south, where 
it loses much of its identity as a separate formation.” 
Mr. Boyle’s bibliographic work upon Orataceous formations and Mesozoic 
invertebrates. 
Publications. 
