all the lower slopes. It is quite probable that a portion 
of the higher outstanding forest covered masses are partly 
of trachyte. I shall so indicate it on my map. The sedi¬ 
mentary beds seem to be but little disturved and I saw no 
indication of dykes or fissures or eruption. To the West¬ 
ward are a number of high buttes or fragments of mesas, 
forming the highest portions of the area included by the Do¬ 
lores. They are nearly all capped with the sandstones of the 
Lugn it ic 7 , group. Some small fragments of the coal series re¬ 
main on the grassy and bush covered summits* The "Lower Es¬ 
carpment" rocks form the usual cliff, as in the Mesa Verde, 
while the 100 to 1500 feet of shales occur in the sropes and 
beneath the meadows* To the North is the broad flat depres¬ 
sion in which the San Miguel flows; the river is canoned. 
East are the Uncornpaligre and San Miguel Mts. logty, ragged 
and beautiful. The summits are trachtic, the lower parts apw 
parently metamorphic. West are the buttes mentioned above 
and beyond a series of anticlinal and cynclinal valley set¬ 
ting off to the North West. The Sierra Abajo and Sal Mts. 
are in view. 
August 27th.- Stations 64 and 65 
Marched 15 miles down fellow Greek, which passes through the 
escarped buttes, making quite a Canon. The scenery is very 
like that of the Lower Mancos and the Western and Northern 
