Lyman.] -^84 [Nov. 2, 



In the norlliern part of the Pe3'tona tract, the rock beds seem to lie 

 jirelty regular, with the very gentle dip of 1 to 102, or 51| feet to the 

 iriile, southeasterly, and the strike of N. 14^° E. The same dip and strike 

 perhaps continue throughout the southern pait of the tract, but the lack 

 of surveys there leaves this point uncertain. There are slight local varia- 

 tions from the general dip causing "swamps" in the mines, say one bun- 

 dled 3'ards across, and sinking, say, one or two feet ; such swamps, how- 

 ever, as are common to all our western, flat-lying coal measures. 



On the Parker tracts the dip is so slight that without much careful lev- 

 eling it would be impossible to tell exactly what it is, or whether it is the 

 same throughout the tracts. It seemed at the time of the survey and of 

 drawing the map, to be in general uniform throughout them, and to be 

 towards the north-northeast (N. 20° E.) about one foot in 78, or 68 feet to 

 I lie mile. But there are local variations of the dip here, too, extending a 

 few hundred yards, or at least " swamps " in the coal beds, depending on 

 liie varying thickness of the rock-layers. 



It now seems, however, not improbable that the strike lines, drawn 

 straight and parallel on the two large maps throughout the tracts of each 

 purvey, should have been gently curved as indicated by the lines of shad- 

 ing of the two surveys on the accompanying little map of their general 

 situation, making the strike curves of one survey conform, bj^ gradual 

 transition, to those of the other, and to correspond with the northwesterlj^ 

 dip that is said to prevail at Coalburg, on the opposite, southeasterly side 

 (if the broad, shallow basin. The strike curves on Lens Creek would then 

 be gently convex towards the northeast, and those of Peytona would be 

 t-lighily so towards the east. Nevertheless, this little change would not 

 affect the principal results of the surveys, nor the identification of the beds. 



Rock-beds. — The following is a general section downwards of the 

 rocks exposed on the Peytona tract, so far as known : 



FT. IN. 



Partly hidden, but chiefly sand rock and shales. . .about 155 



Gray clay " 1 



Coal, A'Ws&wr^/i Z?^(^, with some slate " 4 



Hard fireclay and sand rock and shales " 23 



Coal, bituminous, soft "04 



Fireclay and hidden, but no doubt mostly sand 



rock and shales " 85 



Coal, bituminous " 4 



Fireclay and hidden, but no doubt mostly sand 



rock and shales " 90 



Bony COAL " 3 



Hidden, but no doubt chiefly sand rock and shales " 55 

 Coal, bituminous, with two feet of fireclay in the 



middle " 5 



Hard, gray sand rock and hidden, but doubtless 



mostly sand rock and shales " 120 



Coal, bituminous " 6 



