GEOLOGY OF THE LAKE DISTRICT. 59/ 



Ossipee. Quartz, at O. Sanders's, strike N. 50° E. 



At Samuel S. Fogg's, small southerly 90°. 



clip. On Pocket hill, clip north-westerly. 



Some of these dips are embodied in a section from Hart's saw-mill in 

 north-west Sandwich to the west base of Ossipee mountain (Fig. 104). 

 The strata generally run north or north-east, so that they do not con- 

 form to the direction of the area as it is laid down topographically. The 

 inference from this fact would be that it may continue indefinitely, both 

 to the north-cast and south-west, underneath the adjacent Montalban. 

 These observations show the presence of several axes. The Meredith 

 branch gives mostly north-westerly dipping monoclinal strata, as would be 

 expected from the inverted position between walls of porphyritic gneiss. 

 The anticlinal at the east base of Shepard's hill cannot be of much con- 

 sequence, unless it be proved more extensive. The Sandwich dips are 

 so nearly vertical that folds may be numerous. There seems to be a syn- 

 clinal west of the quartz; one for the sienite of Red hill; another along 

 the west base of Ossipee mountain ; and one strongly marked at Moul- 

 tonborough centre. Anticlinals appear west of Long island and through 

 Wolfeborough. The long fiord of Alton bay is situated upon an anti- 

 clinal. Between Tuftonborough corner and Canaan it seems like a syn- 

 clinal. Fig. 105 will show these axes in a section crossing the whole area 

 at right angles from Sandwich to Wakefield. 



I will mention a few points of interest in these several towns. At C. 

 F. Hawkins's, Center Harbor, this rock carries a five-foot vein of porphy- 

 ritic granite. At C. Chase's, on the line between Meredith and New 

 Hampton, small crystals of feldspar are scattered through the rock. At 

 South Tamworth the rock is like the Bethlehem gneiss, including a hard 

 siliceous layer. The strata are highly siliceous and ferruginous in the 

 extreme west part of Sandwich, and this formation extends only a little 

 way into Holderness. At the east end of Sandy island is a vein of very 

 coarse granite, with large crystals of feldspar. At the south-west comer 

 of Long island and on Mark island are numerous beryls. Trap and 

 other dykes occur at the following places : Irregular trap dykes, with very 

 pretty, small granite veins, at S. Mclntyre's, Tuftonborough ; small trap 

 band on Jolly island ; one four feet wide at Canaan ; dyke of hornblende 

 and feldspar fourteen feet wide, seen for twenty rods, on the east side of 



