254 BOARD OF AGRICULTURE. 



only a portion of ^these Eolian limestones which can produce the 

 best quality of quick lime ; and also that the space occupied on 

 the map by the marking for this rock includes the formation, not 

 the lime belt merely. The relations of the better to the poorer 

 qualities, however, has not yet been made out. We trust that 

 the results of our explorations now set forth, will be a contribution 

 to so desirable a result. 



Camden Belt. The large geological map, and also Fig. 36, show 

 the distribution of another important belt of Eolian limestone in 

 Camden, whose lithological and geological character ally it to those 

 just described in Rockland and Thomaston. The belt commences 

 in Rockport harbor, passes northerly beyond Lily pond, and then 

 turns west, terminating finally near Hosmer pond in the west part 

 of the town. 



As we first see this limestone on the coast, it is whitish and 

 rather friable, but of good quality. Its connection with an over- 

 lying slaty rock is very plain. Kilns of it have been burnt here. 

 As all the rocks upon this promontory have been much disturbed, 

 so the dip of this limestone is variable. The following are the 

 dips observed in order from right to left : 75° S. E. ; 80° S. 80° E. ; 

 65° N. 20° W. ; 80° N. ; 45° N. 10° E. This variation is rather 

 from dislocation than folds. A part of this belt seems to have been 

 torn from it by a fault, and is displayed in the village of Rockport 

 and on the shore to the west of the principal belt, (See Fig. 36.) 

 This indicates the existence of a lateral fault, which we have rep- 

 resented imperfectly. 



Passing up to the carriage road south of Lily pond, we find the 

 limestone dipping 60° N. 30° E. It is exposed in large coarse- 

 looking hummocks on both sides of the road. The quarries now 

 worked in Rockport, are chiefly upon the south-west side of Lily 

 pond, in a high bluff. The rock is really a conglomerate of limestone 

 pebbles ; yet the stratification is extremely obscure. The dip ap- 

 pears to be about 50° N. E. It is chiefly the lower part of the 

 limestone that is conglomeratic. It is possible that these sup- 

 posed pebbles are concretionary. We now come to the curve in 

 the formation, and the numerous observations all show the gradual 

 change of the strike. The formation is twice as wide here as in 

 any other part of its course. To the north of the pond are several 

 quarries, and also to the north-west, whose quality is precisely 

 similar to the Thomaston stone. The angle of inclination varies 



