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Oct. 13, Continued N. E. to crossing of the Chaco River and camped.

Oct. 14, Continued on our course N. E. to Fruitland in the San Juan Valley.

General Features.

The Chusca, Tunicha (or Tunitcha) and Luka[[strikethrough]]d[[/strikethrough]] ^[[ch]] rukai Mts. are one continuous, uniform range extending from Choiska Peak on the south in a N. W. trend across the line into Arizona to lat. 36:35 , or in a straight line for about 60 miles. From either side the range appears level along the top and the contour sheets how a variation in altitude along the whole length of the top from 8600 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 given one name instead of three. The Carris[[inserted "o"]]s however are cut off by a wide gap, dropping close to 6000 feet, though evidently at one time a part of the same range.

The main [[inserted "m"]]ass of the Chusca Mts. is red sandstone elevated in horizontal position and carved away in deep canyons and valleys on the east and west. North of Sheep Spring trail a series of little craters have poured lava over the mesa top 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 and forms a lake, hundreds of them large and small. The contour sheets are dotted over with these lakes and far more remain unmapped. There are m[[inserted "e"]]re shallow basins, often only 2 to 6 feet deep but 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 high water the lakes overflow and form the sources of numerous stre[[inserted "a"]]ms but at

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