GYPSUM    IN    NORTHWESTERN    NEW    MEXICO.  261 
STRATIGRAPHY  AND  STRUCTURE. 
The  Sierra  Nacimiento  consists  of  a  north-south  trending  series  of 
even-crested    ridges    and    serrated   peaks.     It   is    approximately   35 
Fig.  9.— Sketch  map  showing  line  of  outcrop  of  gypsum  bed. 
miles  long,  extending  from  the  latitude  of  Gallina,  N.  Mex.,  on  the 
north  to  the  latitude  of  Cabezon  on  the  south.  Gallina  Mountain 
marks  the  northern  and  Jemes  Peak  the  southern  terminus  of  the 
range.     These  peaks  rise  to  an  elevation  of  more  than  9,000  feet  abovn 
