172 M. R. CAMPBELL — Pi^LEOZOIC OVERLAPS IN VIRGINIA. 



Page 



Pulaski- Max Meadows Area 184 



Overlap north of Pulaski 184 



Overlap south of Pulaski , 185 



Syncline west of Pulaski 185 



Faulted Anticline south of Max Meadows 185 



Relation of Shenandoah Limestone to Devonian Shales on Hamil- 

 ton Knob 186 



Draper Mountain 188 



Summary 189 



Area Studied. 

 general description. 



Along the line of the Norfolk and Western railroad in the counties of 

 Montgomery, Pulaski and Wythe, Virginia, there is an area of compli- 

 cated geology which up to the present time has not received the attention 

 it deserves. The region in question extends from Christiansburg, on the 

 east, to Max Meadows, on the west, and embraces a strip of country from 

 ten to fifteen miles in width and about equally divided north and south 

 with respect to the line of the railroad. 



PRE VI us INVESTIGA TORS A ND THEIR CONCL USIONS. 



From time to time numerous geologists have examined the rocks in 

 this region, but their work has been only cursory and their results are 

 vague and unsatisfactory. The published reports concerning it are, so 

 far as the writer is aware, those of W. B. Rogers,* J. P. Lesley,t W. M. 

 Fontaine, X J- J- Stevenson § and McCreath and d'ln villi ers, || who have 

 uniformly regarded the phenomena here displayed as due entirely to 

 faulting. 



That similar phenomena can be produced by faulting is not to be 

 questioned, for in the southern Appalachians there are cases too well 

 authenticated to admit of a doubt ; but in this immediate region the 

 evidence is far from conclusive, and in fact strongly suggests an entirely 

 different mode of formation. The object of this paper is to present the 

 conclusions reached and, as far as possible, the facts upon which they 

 are based. 



* Geology of the Virginias. 



t Am. Phil. Soc. Proc, vol. ix, pp. 30-33. 



X Am. Jour. Sei., third series, vol. xiii, pp. 37-48 and 115-123. 



gAm. Phil. Soc. Proe., vol. xxiv, pp. 61-108. 



I The New River-Cripple Creek Mineral Region of Virginia. 



