Rocky kcioutain to ip 
30 
seen to mark the northern terminus or the lower oret, sandstones, 
which form the floor of the plains to the- south, rising gently to 
the north and giving a southern system of drainage,, which is one 
of the reniarkahj,e features of this region* Colei Springs canon 
and the head of Canon Colorado seem to cut the deepest into this 
northern edge of this southerly inclined tableland. From the head 
of Gold Spring the line of erot. cliffs extend northwest to a 
promontory which is supplemented by a lone butte and thence con¬ 
nects with- the western slopes of the Aba jo $ as the slope of this 
table is southward, the drainage fram the northern and northeast¬ 
ern slopes of the Aba jo is turned to the south and by a semicir¬ 
cular canon enters the Canon de Montezuma* in a similar manner 
■ ' ■ i 
all the drainage to the east up to the very line of northward 
facing bluff and the brink of Canon Dolores is turned to the 
south' into the Canons of Ilontosuma and Hevermoep* The Canon of 
Dolores could be traced as far to the north as the point whore 
the plateau breaks off to the north* Beyond this the plateau 
region extends to hone Cone end instead of breaking off to tbs 
north slopes off toward the San Miguel in a manner similar to 
the slope south* Eastward from the Aba jo the streams may be 
seen to enter Canons and can only be followed from this by the 
lines of cliffs, which increase toward the Ban - Tuan until the 
canons on account of their great mmber and width occupy more 
space than 4fc$ tables or strip of M^iland between* There seems 
to b© a gentle depression extending across the plains from the 
Abajo toward bends of the Dolores in which the shales have been 
preserved in patches and from which the streams enter the shal¬ 
low canons that cut through, the gently elevated belt that rims 
