Plate 7 



W. J. Miller, photo 

 Photograph of a hand specimen showing the contact between diabase 

 and Grenville Hmestone from the Asbestos mine three- fourths of a mile 

 southeast of Thurman village. Nearly natural size. The zones lunnbered 

 on the left side corresi)()nd to those described on page 43. Zone 4 is scarcely 

 brought out in the picture and zone 3 is best shown on the right side. 



