400         CONTRIBUTIONS   TO   ECONOMIC   GEOLOGY,   1907,   PART   II. 
QUALITY    OF    THE    COAL. 
Fresh  samples  from  the  Kanab  field  could  not  be  obtained,  and 
no  analyses  have  been  made  of  this  coal.  It  resembles  that  from  the 
eastern  part  of  the  Colob  field,  of  which  it  is  a  continuation,  and  prob- 
ably the  analyses  of  the  coal  from  Tps.  40  and  41  S.,  K.  7  W.,  indicate 
the  general  composition  of  the  coal  in  the  Kanab  field.  It  should 
be  noted,  however,  that  the  cover  of  the  coal  in  a  considerable  part 
of  the  field,  for  2  or  3  miles  back  from  the  outcrop,  is  generally  slight — 
in  many  places  less  than  100  feet — and  doubtless  in  such  places,  on 
account  of  weathering,  the  coal  is  of  inferior  quality. 
