48 
Tra^^sactions Texas Academy of Science. 
54. Ceagin, F. W. 
Further N'otes on the Cheyenne Sandstone and hreocomian Shales. 
Amer. CeologisC Vol. YII, pp. 179-181. Minneapolis. March, 
1891. 
“During the summer of 1890, and since my article Dn the Cheyenne 
Sandstone and the Neocomian 'Shales of Kansas/ * * I have gath- 
ered some additional data touching these formations.” 
“ * * * I have been shown a locality on the Korth Canadian or 
Beaver river, about longitude 100° 12' W., where both the larger and 
smaller varieties of Gryphwa pitcheri occur in the Loup Fork Tertiary 
conglomerate, some of the specimens showing very little wear, and bear- 
ing witness to the former extension of the Keocomian over that region.” 
“Occurrences reported to me from points not far northeast of Tascosa, 
Texas, are probably referaible to the Keocomian.” 
“I have also reconnoitered that portion of the ‘Cherokee Outlet’ and 
‘Panhandle of Texas’ adjacent to the Cimarron river, and the Panhandle 
extension of the .Santa Fe railway southwest to the main Canadian. 
Loup Fork Tertiary sandstone, or more commonly the sandy decomposition 
product of the same, cloaks the divides and their south slopes, resting 
in general directly upon ‘red beds’ * * * ; yet the data in hand leave 
little room to doubt that the lower JSTeocomian strata once prevailed from 
the western border of McPherson county, Kansas, * * . to the foun- 
dations of the Llano Estacado.” 
“By the courtesy of Prof. Hill, of the Texas Geological Survey, I have 
been able to traverse with him a course from Millsap, Texas, to Weather- 
ford, and thence to Gr anbury, and thus to confirm his reference in 1889 
(Ann. Kept, of Geol. 'Surv. of Ark., 1888, Vol. II, p. 115), of Nos. 5 and 6 
of my Belvidere section to his Fredericksburg shale and Trinity sandstone, 
respectively.” 
“The paleontologic and lithologic identity of .No. 5 of my Belvidere section 
with a certain shell-conglomerate occurring at Weatherford — the lowest 
known Gryphiea-bearing horizon of Texas— is such as to warrant me in 
asserting the essential chronologic equivalency of the two horizons.” 
Discussion of Gryphwa pitcheri. 
“The Cheyenne sandstone may be regarded as the much abbreviated rep- 
resentative of the series of incoherent sandstones underlying the above 
mentioned Weatherford shell- conglomerate, and outer o-pping between Mill- 
sap and Weatherford in alternation with harder strata containing Pleuro- 
cera, Nerinwa, and other forms, to the most of which southern Kansas 
can show nothing similar. The upper and major portion of the basal 
stratum of friable ferrugiiious-yellow and white sandstone seen on Grind- 
istone creek and its tributaries a little east of Millsap, resting upon the 
eroded Carboniferous — 'from the harder elements of which its basal con- 
glomerate portion is derived— bears especial lithologic resemblance to a 
very common phase of the Cheyenne sandstone.” 
