282  CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,  1905. 
Generalized  section  of  Wasatch  beds  in  Gunnison  Plateau,  at  Wales  coal  mine. 
Feet. 
Fine-textured  white  limestone 100+ 
Talus 100 
Cray  limestone 10 
Brown  sandstone 10 
Talus 150 
Brown  sandstone 5 
Drab  limestone 15 
Brown  sandstone 10 
Drab  limestone 5 
Talus 100 
White  limestone 10 
Drab  shale 50 
Buff  limest  one 15 
Drab  shale 50 
Talus 150 
Drab  limestone 10 
Drab  shale,  with  streaks  of  purple  shale 150 
Brown  sandstone 20 
Drab  shale,  with  a  few  thin  beds  of  limestone 250 
Brown  sandstone 5 
Drab  shale 25 
Brown  sandstone 10 
Bull  shale 100 
Gray  limestone 25 
Black  limestone 5 
Coal  and  bone 7 
Black  limestone 10 
Dark  shale 15 
Brown  sandstone 10 
Drab  shale 10 
Gray  limestone 5 
Bull  shale 40 
Sandstone 10 
A  notable  feature  of  the  section  is  the  occurrence  of  coal  immediately  between  beds  of  f 
limestone.     The  limestone  itself  is  Mack  and  bituminous  and  contains  abundant  crushed  1 
shells,  including  indeterminable  species  of  the  fresh-water  genera  Sphserium  and  Physa. 
At  the  entrance  to  the  mine,  on  the  outcrop,  the  following  section  is  exposed: 
Section  at  entrance  to  Wales  coal  mine. 
7.  Limestone.  Inches. 
6.  Coal  and  bituminous  limestone 8 
5.  Limestone 18 
4.  Coal  including  streaks  of  bone 36 
3.  Limestone 5 
2.  Coal  and  bone 17 
1.  Limestone. 
84 
No.  2  of  this  section  is  rejected.     A  detailed  measurement  cf  No.  4,  made  in  the  mine, 
follows: 
Section  in  Wales  coal  mine. 
Black  limestone.  Inches. 
Coal 10 
Bone 2J 
Coal 4 
Bone 1 
Coal !  4 
Bone 2£ 
Coal 1 
Bone 1 
Coal 10 
Black  limestone. 
