28 History of Hingham. 



On East Street, passing from Side Hill Street towards Cohasset, 

 may be found in the fields adjoining the right side of the road 

 and back from it many extensive ridges of rock. Short of 200 

 feet a small exposure of granite occurs just within the fence-wall, 

 and a little further on, say twenty or thirty feet, is one of diorite. 

 Back of these about sixty feet is another of diorite. Following the 

 road 310 feet from these, rock appears in patches over the sur- 

 face for eighty feet, extending some distance back from the fence, 

 which is likewise diorite. Passing beyond these exposures 140 

 feet, fields of rocks are reached occupying a great part of the sur- 

 face for at least 700 feet. Some of them are diorite, some granite, 

 while others among them, presenting surfaces of both diorite and 

 granite, are apparently of the singular combination mentioned as 

 mixed rocks. It would, however, be necessary to blast them in 

 order to verify this. 



On the left side of the road there are but few exposures, and 

 these are of the same general character as those mentioned. 



On Side Hill Street, and in fields adjoining, diorite appears 

 abundantly. At a distance of 310 feet from East Street, a small 

 exposure may be found on the right side of the roadway, and fifty 

 feet beyond this another just within the border fence. Proceeding 

 300 feet further there is within view on the fields at the right many 

 ridges and smaller rock masses extending over an area of two or 

 three acres, all or nearly all of which are of the same rock. On 

 the left of the road, 620 feet from East Street, a long ledge of rocks 

 skirts the carriage-way, which extends 280 feet. For the first few 

 feet it is diorite, the rest of it is granite. Granite is also the pre- 

 vailing rock on the high ground of the adjoining field. 



When entering Hull Street from East Street, diorite appears on 

 the right side, close to the junction of the two streets, both on the 

 border of the roadway, and within the enclosure of the adjoining 

 estate. Proceeding on Hull across the railroad, a high cliff of 

 rock is seen back from the street. 200 feet or more in length, which 

 exhibits upon some portions surfaces of diorite, upon others granite, 

 — showing it to be probably of the mixed character mentioned in 

 previous cases and to be described hereafter. This is succeeded 

 by granite, and there is no more exposure of diorite on or near the 

 street until about 2,060 feet from the railroad, where a ridge of it 

 appears on the field at the left, not far from 200 feet from the 

 fence ; and 300 feet farther some may be seen on both sides of the 

 road. The rock exposures beyond these are all granite, until after 

 passing Canterbury Street between three and four hundred feet, 

 when there may be seen ridges on the fields skirting the left side 

 of the road and extending for a quarter of a mile or more, which 

 are likewise of the mixed diorite and granite. The rocks of the 

 last 300 to 400 feet of the street within the town limits are all 

 granite. 



All the exposures of diorite within the territory of the town that 

 may be observed in passing along the streets and lanes have been 



