that gave such constant and. marked color, also horizontal lines. 
I notice in these buttes that one set of th&sbeds have a pe¬ 
culiar, wave like series of flexures, while the set lying upon 
them are as straight as an arrow, seeming to rest upon the sum¬ 
mits of the nmnute folds, so: 
I am not able to account for this, since I had. no time to visit 
the cliffs and examine. If it is a nonconformity it is a very 
peculiar one, but it is probably only eccentric sedimentation. 
While working on the lower San Juan we had failed to find the 
mouth of Gothic Creek and were somewhat skepticalor to its ex¬ 
istence at all. I find that the tipper course as laid down by 
Backus is all'right. The curve around this western spur of 
the Carriso is very peculiar. It cuts through the anticlinal 
apur close under this edge of the trachytic table and also 
through the subordinate wave, exposing the red bed (pale) in 
both, but beyond its course is indefinite. The Engineer map 
would turn it to the westward by the red tables and into the 
San Juan almost South of the Blue Mountains and near our 
western line. From this point if appears to ~ut its way through 
the No. 1 capped mesas South of the San Juan and enter that 
river some 25 miles higher up than the Engineer’s put it. 
