600 STRATIGRAPHICAL GEOLOGY. 



3. MONTALBAN SeRIES. 



The Montalban rocks of the Lake district may be grouped in two 

 areas : first, those occupying the north-east portion of the territory ; sec- 

 ond, those encircHng the Moose mountain eruptive rocks, lying partly in 

 the Coast region, but described here for convenience. We may group 

 the dips as follows : 



Samhvicli. Effingham. 



On Guinea hill, 52° N. 53° W. Near A. W. Drake's, 70° S. 70° E. 



At Weed's mills, 50° N. W. At W. Rumney's mill, 80° N. 85° W. 



Near L. C. Clark's, east line, 55° S. \V. At south-west corner, N. 70° W. 



TamivortJi . Tuftonborotigh . 



At W. Cushing's, N. 30° W. At J. Bean's, east corner, 50° N. W. 



On Stevenson's hill, near West line, north- At T. Durgin's, near corner, west. 



west. Freedom. 



At Tamworth centre, westerly, small. At village, 75° W. 



At South Tamworth, 30° southerl}^ East part, westerly. 



One mile east of South Tamworth, 50° N. At E. Wood's, West Freedom, 50° W. 



Madison. Ossipee. 



Near John L. Frosfs, 60° N. W. At Water village, 60° N. W., contorted. 



At Lead mine, 60° N. 75° W. One mile south-west of court-house, 30° N. 

 At L. Long's, 60° W. to N. W. 85° W. 



Farther cast, S. 65° W. 



It is surprising to find the Montalban rocks over so large an area as is 

 indicated by these figures, possessing monoclinal dips. In rocks at the 

 north base of the Ossipee mountains are evidences of anticlinal structure, 

 but in a gneiss greatly resembling the Bethlehem group. In Effingham, 

 on the south side of a large intrusive mass, are synclinal dispositions, but 

 everywhere else the inclination is uniform. To understand this arrange- 

 ment we have to resort to the supposition of extensive inversion, as has 

 been already explained (p. 253). The great central anticlinal of Frye- 

 burg, Me., does not, however, make its appearance through Eaton and 

 Madison, as would be the case if the rock in the Lake district con- 

 formed to those farther to the north-east. It may pass a little more to 

 the east, and manifest itself in the Green Mountain granite of Effingham. 



A few points require special mention. At Weed's mills. Sandwich, the 

 gneiss is a little like the segregated variety, with interstratificd ferrugi- 



