GEOLOGY : SOUTH SHORE. 29 



granite to the Cambrian slate on tlie north slope of North Com- 

 mon hill. 



LAKE BOUVE.' 



(An extinct glacial lake.) 



Route. — Boston to Quincy by New Haveo road, Kneeland street 

 station ; fare, $.15. From Quincy by electrics or wheel. 



Taking the East Wej'niouth car at Quincy and leaving the vil- 

 lage, one can have a fair view of the "Quincy plain" of lake Bouve, 

 which has an elevation of forty feet. It is cut in two by the Wey- 

 mouth Fore river. The car continues on this plain to Old Spain, 

 where it turns south and soon descends to the marsh lands, pass- 

 ing down the delta front of the plain. As the car descends look 

 west to see the front of the plain along the Fore river. Less than 

 a mile south of this plain, the road passes through a cut in the 

 narrow esker-like portion of a small representative of the "Hing- 

 ham plain" (fifty feet). To the west of the road it is narrow 

 and looks like an east and west esker. A good section is exposed, 

 where it is cut by another road. This section when not covered 

 bj' talus shows stratification and ripple-marks well. To the west of 

 the main road the plain is broader. A large kettle hole occurs in it. 

 Its northern end is an ice-contact slope, of high grade in most 

 places. Its southern margin shows a steep but well-marked lobate 

 *' delta front." Follow this plain west, to Weymouth Fore river, 

 where a series of north-south eskers occurs. From the top of 

 King Oak hill, a drumlin just south of Weymouth Heights station, 

 a comprehensive view of this and some other parts of the extinct 

 lake can be obtained. Taking the car again for East Weymouth, 

 and changing to the South Weymouth car, one passes for a long 

 time over a part of the " Whitman plain " (one hundred feet). 

 This encloses Whitman pond. The plain can be seen well only by 

 leaving the car at Lovell's corners and penetrating the woods. 

 Just east of the pond occurs a large rocky tract which rises island- 

 like above the plateau. Several outliers of this plain occur to the 

 east and west of the pond. 



Passing southward from Lovell's corners, leave the car at the 

 ' fork of the road, and take the eastern branch, ascending the north- 



'Tlie niaterl.ll for tlilg section was furnished by Mr. A. \V. Graljau. 



