108 GUIDEBOOK OF THE WESTERN UNITED STATES 
To the southwest the Sierra Diablo is separated from Salt Basin by 
Beach Mountain and the Baylor seeeies ane blocks both, the 
latter having the relations shown in Figur 
About 35 miles north of Van Horn, not "e oe. the Figure Two 
ranch, the road to the Carlsbad Caverns passes the north end of the 
Sierra Diablo, where the northerly dip of the great limestone succes- 
sion carries it rapidly below the surface. In the next few miles the 
Salt Basin is crossed diagonally and the westward-fronting escarpment 
of the Apache and Delaware Mountain range is gradually approached. 
This range consists of limestones and sandstones of Permian age, 
which also constitute various outlying buttes. Very prominent 
features to the north are the high white promontory of Guadalupe 
Point (see pl. 15, B), at the south end of the Guadalupe Mountains, 
and El Capitan, the culminating peak of that range and the highest 
summit in Texas (elevation about 8,700 feet). These mountains are 
capped by a thick succession of light-colored limestone (Capitan lime- 
stones) of Permian age which extends to the Carlsbad Caverns. It 
w. 
Baylor Mts. 
Sierra Diablo 
Cp 
Ficure 19.—Secti t of the Si 
phtenk nat om sthgers rh By P. B King. Am, M 
stone; aS El Paso limestone; Om, Montoya limestone; Sf, Fusse 
limestones of Permian age 
Diablo and Baylor ote ai 15 miles 
formation; €vh, Van Horn sand- 
Iman Slade Cp, 
lies on limestones and sandstones of the Delaware Mountain forma- 
tion, which are well exposed in the ascent to the divide just east of 
Guadalupe Point and at intervals farther north. The relations are 
shown in the sections in Figure 20. It will be seen from the first of 
of Van Horn, the reef limestones are 
overlain by sandstones of the Delaware 
Mountain ratmecige a remnant of the 
thick of pre-Capitan strata 
well developed in the Delaware and 
region and it is through a gap along one 
these breaks that the Texas & 
limestone, capped in places by strata of 
Comanche age, lies directly on the Van 
Horn sandstone. The Comanche beds 
here consist mainly of sandstone with 
some conglomeratic layers and a few 
trending northwest cross | removed b 
: =e he southern part of the Sierra Diablo 
remains 
| amount of errs, strata having been 
Y erosion. 
