262 GUIDEBOOK OF THE WESTERN UNITED STATES 
inappropriate. A wide area of sand occupies the valley from a point 
beyond Indio to Myoma. To the north are prominent hills of sand- 
stone of late Tertiary age, in front of which passes the San Andreas 
fault. This fault cuts the sandstone for a short distance near the 
west end of the range. At intervals along the San Andreas fault and 
sustained by moisture which it brings to thesurface, aresmall clumps of 
the Washington palm, mostly visible from the train. Behind the hills 
about 6 miles northeast of Edom are the Thousand Palm Springs 
(pl. 41, B), the water of which is believed to rise on the Mission Creek 
fault. Farther back are the high ridges of the Little San Bernardino 
Mountains, which consist of a great batholithic mass of granitic rock 
ranging from pink biotite granite to dark diorite. (Brown.) ; 
San Jacinto 
FR: 
Horizontal scale 
ane Miles 
L 
Vert cal scale 
’ 10000 Feet 
OLE ie 
FIGuReE 63,—Section through the San Jacinto Mountains, Calif. After Frazer. ss, Sandstone; sc, schist; 
, gneiss; gr, granite 
The San Jacinto Mountains, prominently in view to the northwest 
(pl. 42, A), consist of a huge central mass of granite * flanked by 
schistose rocks * believed to be a contact phase of the granite. (See 
fig. 63.) 
At Rimlon siding the railroad skirts a large hill of loose conglom- 
erate, mostly covered with white wind-blown sand in which Woodring 
has found marine Tertiary fossils. These fossils also 
Rimlon. were found in and near Painted Hill, a ridge east of the 
New Oras 18 Whitewater River not far north of the railroad. 
aap are numerous mollusks in large variety and 
y Foraminifera 
The Whitewater 1 River i is a wide ‘dry wash filled with boulders and 
sand. It is a flowing stream in the mountains just north of the rail- rail- 
% According to Frazer, the ere 60 to 70 per cent. Some of the + nek 
i would be classed as quartz monzonite, 
* The schists dip away from the 
central mass at angles mostly from 
30° to 60° and in places are overlain by 
dj co so schists, 2,600 feet or _— 
limestone (marble). These rocks are 
—< to have been metamorphosed 
