88 GUIDEBOOK OF THE WESTERN UNITED STATES. 
this section (see fig, 19) the syncline has been so squeezed by pres- 
sure from the east that its sides have been pressed close together 
or overturned, and consequently all the rocks dip toward the east. 
The lava is prominent in this part of the valley, but it is limited 
to the hills on the opposite side of the river. These hills at first 
appear to be composed entirely of lava, but close scrutiny will show 
that the red sandstone crops out here and there near the river level. 
This low place in the sandstone evidently marked the middle of the 
valley at the time the lava was poured out and filled the valley 
to a depth of 300 or 400 feet. West of milepost 205 the railroad 
crosses Badger Creek, which drains a large territory between the 
Arkansas: Valley and South Park. The red sandstones are. well 
exposed in the bend of the river a little farther on and in the ap- 
Ficurs 19,—Section of the sey a de Cristo Range and the valley on its east side, through 
Hunts Peak and Howard. 
proaches to the tunnel beyond milepost 206. They are fairly con- 
spicuous in the river bluffs near milepost 207, but west of this point 
the red color disappears from both sides of the valley. The last 
lava-capped hill is nearly opposite milepost 207, and this hill marks 
the western limit of the old valley, which is now so deeply filled with 
the Meare material that it constitutes hills rather than a valley. 
Lean’ the railroad is built upon a broad gravel-covered 
ri nce of exposures of hard rock is due largely to this 
fact and ae the fact that the flat, or rather terrace, is composed o 
i the Weber shale and sandstone, which underlie the 
raghrntdec os eet POU Sandstone that is so conspicuous farther east. 
Dene 208 wike This relation is due largely to the effect of a cross 
anticline, which trends in the direction followed by 
the railroad. This anticline brings the Leadville limestone near 
the surface, but it can not be seen from the railroad until the train 
passes Wellsville Springs. Its position is marked on the river bank, 
however, by numerous springs, which carry so much lime in solution 
that as soon as they emerge from the bank they deposit the lime 
