Oct. 13, Continued K. E. to crossing of the Chaco Kiver and camped. 
Oct. 14, Continued on our course K. £. to Fruitland in the San Juan Valley. 
General Features. 
ch 
The Chusca, Tunicha (or Timitcha) and Luicacliruicai iJta. are one con- 
tinuous, uniform range extending from Choiska Peak on the south in a K. W» 
trend across the line into arizona to lat. 26:35 , or in a straight line for 
about 60 miles. From either side the range appears level along the top and 
the contour sheets show a variation in altitude along the whole length of the 
top from 8600 to 9400 feet. The main sandstone ridge, or plateau top, seems 
close to 9000 feet from end to end but a few craters, necks and lava ridges 
to the northward rise 200 to 400 feet above the mesa while one gap through 
which the wagon road passes drops to about 8600 feet. The range should be 
ffiven one name instead of three. The CarrisOs however are cut off by a wide 
gap, dropping close to 6000 feet, though evidently at one time a pjrt of the 
> 
same range • 
The main ]j[ass of the Chusca Mts. is red sandstone elevated in horizon- 
tal position and carved away in deep canyons and valleys on the east and west 
i 
North of i5heep Spring trail a series of little craters have poured lava over 
the mesa toj) in rough ridges and buttes standing on the sandstone floor, but 
generally the top of the range is so flat that every depression fills up with 
water forms a lake, hundreds of them large and small. 
The contour sheets are dotted over with these lakes and far more remain un- 
mapped. They are mere shallow basins, often only 2 to 6 feet deep uut full 
of good water and some filled with Potamogetons and a plant resembling wild 
rice. The lakes are mainly close to 9000 feet in altitude. At seasons of 
hieh water the lakes overflow and form the sources of numerous str^s but at 
