22 WP PENNY 
KANSAS! 
Nemaha Granite ridge-—The outstanding feature of eastern 
Kansas is the Nemaha Granite ridge, which extends from Seneca in 
a southwesterly direction toward Winfield. The top of the granite 
lies at +560 feet near:Seneca and at —2,200 feet near Winfield, 
which indicates a southward dip of the ridge. From the Kansas State 
Geological Survey Bulletin 13 we quote: 
The earth movement, which elevated the granite appears to have taken 
place in the post-Mississippian and pre-Pennsylvanian time, for the upper 
part of the Ordovician and all of the Mississippian has been stripped away 
in the region of Eldorado and Augusta. North of Butler County, along the 
axis of the uplift, all of the sedimentary rocks older than the Pennsylvanian 
were removed so that the Pennsylvanian rests directly on the granite ridge. 

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Loca, Macaeric Vectors in tHe 
STATE of KANSAS 
@ W.P Jeme 



Fic. 6 
If, therefore, the granite is embedded in lower Ordovician in the 
southern part of the ridge and in the Pennsylvanian in the northern 
part, we may expect this ridge to be indicated magnetically as a 
“low” on the south and as a “‘high” on the north if the Ordovician 
is of a higher and the Pennsylvanian of a lower magnetic permeability 
than the granite. 
1 The local magnetic vectors are based on the information given in “United States 
Magnetic Tables and Magnetic Charts for 1925,” op. cit. 
350 
