346 The American Geologist. June, 1900 
described by captain Dutton. From Paguate, an interesting 
pueblo with well cultivated orchards, we continue north- 
eastward through a Cretaceous area where the strata are 
nearly horizontal and so are exceptionally easy to study. 
Suddenly a series of extensive north and south fault lines ap- 
pear, on the eastern side of which, some six miles west of San 
Ignatio, we find the upper lignite-bearing Fox Hills beds at 
a level occupied on the west by tl-ie "Gasteropod zone" of Fort 
Benton age or older. The country is indescribably dreary, 
being of such loose texture as to support no vegetation. At 
San Ignatio we enter the region already described, having 
iiastily explored an area of over 12,000 square miles. 
One is deeply impressed by the homogeneousness of the 
geology of this large area and the evidence of uniform condi- 
tions existing throughout. This uniformity is also seen in 
the economic products. In its proper place at the top of the 
Permian the gypsiferous and saline deposits are so generally 
present that one comes to rely with great assurance upon 
finding salt springs along these exposures. The amount of 
salt and gypsum is truly enorncus and there seems to be no 
doubt that the salt deposits will some day be of enormous 
value in the development of the territory. In quantity and 
quality they will be found to exceed the similar beds in Kan- 
sas and Texas. 
Description of Plates. 
Plate VIII. 
Sketch map of part of Bernalillo and \'alencia counties, New Mexico. 
Plate IX. 
Sketch map of part of Valencia county. New Mexico. The relation 
between the two maps will be correctly orientated if plate IX be turned 
at right angles to plate Mil and the line of the Atlantic and Pacific 
railroad as marked on the upper right hand corner of plate IX be made 
to join the same line in the lower left hand corner of plate VIII. 
The geological data are approximate. 
