Record oe Geology of Texas, 18SV-189G. 
255 
408. Walcott, C. D., and otihers'. 
Discussion of HilFs paper on ^‘The Comanche Series of the 
Texas- Arkansias Eegion 
Bulletin GeoL Soc. of America, Vol. II, pp. 526-527. 1891. 
Mr. C. D. Walcott: ‘Trofessor Hill has brought up the question debated 
by many geologists, whether the Cretaceous and later formations ever 
extended over the central Paleozoic area of Texas. lA few years since I 
examined the latter rocks of this area and saw the escarpments of the 
iCretaceons strata facing the central Paleozoic area. As the last report of 
the Texas State Survey takes the ground that this Paleozoic area was an 
island in the Cretaceous sea, it is interesting to see how far the facts 
accord with this theory. .From the statements communicated by Professor 
Hill, and from analogy, it seems that he must be correct, and that the 
iCretaceous overlapped this central area; otherwise it would now be reduced 
to base-level by erosion. T should like to hear what the geologists of 
the Texas State Survey, who are present, have to say about this theory.” 
Mr. Fj. T. Dumble: “ 1 am not personally acquainted with the geology of 
the central area save in a general way. Dr. Comstock, who is in charge 
of the district, has given in his report some of the reasons why he con- 
siders this area to never have been covered with the Cretaceous rocks, 
among o«ther reasons urging that many points of this area are higher than 
any points of the surrounding Cretaceous area.” 
Professor Hill: ‘‘Generally, one can look over the Paleozoic area from 
the Cretaceous 'escarpment, dt may be true that the Paleozoic does, in 
some places, rise to the level of the Cretaceous escarpment; but it is neces- 
sary to have at least 4,000 feet of Cretaceous strata removed to bring the 
two horizons on a level, and consequently the Paleozoic would require to be 
at least that much higher than the present escarpment to have been 
uncovered by the Cretaceous sea.” 
For the remarks of Dr. Cooper Curtice, see Title Ho. 83. 
409. Walker, Joseph B. 
Notes on the Geology of Burnet County.'^ 
Geological and Scientific Bulletin, Yol. I. Hdiis'ton, Feb., 
1889. 
“Statements in regard to characteristics, relations, and distribution of 
the Cretaceous and Carboniferous.” iFrom Darton’s 'Record of N. A, Geol. 
for 1887, etc.. Bull. U. iS. Geol. Surv., No. 75, p. 161. 
410. 
Report of. 
Second Ann. Rept. of the Geol. Surv. of Texas, 1890, p. cii. 
Austin, 1891. 
Administrative report^ During the field season of 1890, Mr. Walker 
was assigned to Panola, Shelby, Nacogdoches, and Rusk counties for the 
purpose of examining “the quality of >the iron ore deposits” and defining 
“the boundaries of such ores as would probably be of immediate economic 
value, with ‘such observations on the character of the surrounding geologic 
formations as the time will permit/ 
