SOUTHERN PACIFIC LINES 95 
views of the rugged peaks of the volcanic region, notably of Mitre 
Peak, (see pl. 13, C), which lies several miles northwest. There is 
a downgrade into Alpine over volcanic rocks of various kinds.” 
Alpine is in the broad valley or amphitheater of Alpine and Leoncito 
Creeks, about 4 miles wide, with alluvial floor, flanked on all sides by 
cliffs and peaks of voleanic rocks of the Tertiary suc- 
Alpine. cession. It is an exceptionally beautiful location, 
isd arr 306 and the views in all directions are very attractive. 
New Orleans 966 eee called Murphysville, Alpine came into ex- 
tence with the railroad, Texas rangers being estab- 
lished there to io the builders from the Indians, who hotly re- 
© x o 2 
S 1 S 23 
ee | Pe ns ee 
SE 8" Leg EAU ED: etal eG 
3 t gee CAs Pp ¥e OS eRe se NW. 
- 
peas = 
, 
’ 
Y ges 
ae Creek i 
overthrust 3 V2 fo) 1 MILE 
L 
= name: = 2 KILOMETERS. 
FIGURE 12.—Section pre of ode ae Pang stead —— of the ieee 2 
Creek overthrust, B. King. €, Cambrian; O, Ordovician; D, Devonian; TS 
ipuitesticasieiecd eaeetic na formation; pee Gaptank 
sented their presence. It is now an important commercial center for 
the Big Bend and a wide area of stock country to the north and west. 
Aktuda Mtn. co § 
° t - Miles 
eahignd a Bie pone of Altuda abaya northwest of Altuda siding, Tex. By P.B. King. a, Altuda 
e; d, massive dolomite (Capitan); K, limestone of Comanche age; 1, Leonard formation; w, 
ae nla ig, intrusive dikes; s, syenite mass 
The Sul Ross Teachers Colteee’ established in 1920, is built on the side 
of a hill east of the town. This hill is composed of lava (trachyte) of 
In western Texas the later for- { rine conditions Lente a= long into the 
but western Texas 
mations of the Upper Cretaceous are | Tertiary period, 
largely sandstones which carry local coal | from late Cretaceous time was an up- 
i ins of ition 
interbedded in places. These | fragmental material. Prior to these 
strata are overlain by a great succession | eruptions the Cretaceous strata were 
of lava flows, tuff, and agglomerate of | flexed and faulted, and in areas of most 
voleanic origin, most of which is re- | pronounced uplift there was consider- 
garded as of Tertiary age. Sedimen- | able erosion, for locally the volcanic 
tary beds in this succession contain | rocks lie on deeply eroded surfaces of 
leaves of Eocene age (Berry), and bones the deformed strata. These volcanic 
of Miocene animals occur in higher | rocks present the record of various 
beds (Baker). In eastern axial ma- | episodes of igneous activity continuing 
