In the region of Tosca (Montoro Cerrum) refer think a series of much folded strata I see a closed syncline overthrust to the north or N.E. Are these Campanian strata? Where did this great mass of sediment come from? All appears to be soft stuff, muds. They must have been Jurassic elevation in this general area to have furnished this debris. Where was this land? To the S.W? Above the great mass of mudstone come in thick zones of impure limestone. The dips are usually low, but in places are nearly vertical, At Sierra Blanca the R.R. comes around with low dips of the Crest. This is a little town and one could get hotel here. Altitude 4572 feet. All low dipping Crest. to Lotro (3943 elevtn) with local sharp dips. Between the crests are sparse lilacss, mostly four good thickness of strata. All the way to Valentino it is Crest plain with outcrops in low crest region. Elevation 4424' It is plains country all the way to marfa