ELY GREENSTONE. 165 



INTERESTIJ^G liOCALITIES. 



Under tliis heading there will be found special descriptions of certain 

 localities where the rocks show especially well some of the characters 

 already described, or for other reasons are considered worth}^ of more 

 detailed mention than has been made of them in preceding ^^fi-g'ss- These 

 descriptions of localities may not perhaps be read by the general reader, 

 but it is ho]3ed may be useful to future students of the geology of the 

 district who may wish to verify the statements herein made, and who would 

 therefore desire to visit some of these places. 



Some of the best places at which the general characters of the Ely 

 greenstone may be studied are on the hills near Ely. These hills are 

 very nearl}^ bare, and numerous exposures of the greenstone may be found 

 on them. The ellipsoidal parting is well shown in exposures in the cut 

 on the south side of the railroad track west of the station, and can be 

 seen in numerous jjlaces on the bare hills between Ely and Long Lake. 

 Atnygdaloidal structure is also very commonly present. No spherulites 

 were observed here, although these are abundant on the high hills due 

 north of Ely, on the north side of Long Lake. On the hill west of the 

 town and south of the water tank ellipsoidal pai-ting, with peripherally 

 arranged amygdules, may be observed, and at one place not very far from 

 the road leading up to the cemetery the transition from the ellipsoidally 

 parted portion into the nonellipsoidal greenstone can be seen. The 

 greenstones on this hill . are cut by dikes of granite-porphyry. Just 

 northeast of the Methodist church on the east side of Ely numerous basic 

 dikes are found cutting the greenstones. About a mile and a half south 

 of Ely is a bare ridge, bordered on the north and south by considerable 

 depressions, on which there are many exposures that show the amyg'daloidal 

 and ellipsoidal characters of the greenstones. Irregular lines, which seem 

 to represent flowage lines, run through these rocks in many places. This 

 ridge offers a fairly g-ood place for the study of the volcanic characters of 

 the greenstones. It must be noted, however, that the greenstones in this 

 ridge have been extremely altered and in many places are more or less 

 completely schistose, and would now be spoken of as amphibole-schists. 

 This alteration is due to the intrusion of the Giants Range granite, which is 

 present in these rocks in numerous dikes, and which occurs in mass a 



