112 PROCEEDINGS OF THE ACADEMY OF [1890. 



valley to the north, form the locality kno\yu as Mineral Hill. 

 Leaving this for a moment, we find along the road indications of ser- 

 pentine and about a quarter of a mile west of Ridley creek large and 

 abundant masses of enstatite, east of which are again the schists. 



The Mineral Hill locality consists chiefly of the bed of the stream 

 above mentioned which rises south of the State road and flows 

 northeastwardly into Ridley creek. The descent is rapid and the 

 stream has cut quite a gorge. Its bed is full of the fragments of the 

 rocks, but the exposures of the rocks in place are not satisfactory. 

 Serpentine, actinolite and granulite, the latter containing the moon- 

 stone and sunstone which have made the hill famous, are abundant. 

 At one place the serpentine could be seen apparently interbedded 

 in decomposed granulite. 



A section on this creek where there had been a deep wash shows 

 very much the same as in the cuts near Glen Riddle, viz. : 

 N. W. 1. Granulite decomposed into fragments but the 

 fragments hard and seemingly unaltered grow- 

 ing harder southeastward, strike N. 40° E. dip 

 northwest irregular but steep. 



2. Hallite (?). 



3. Honeycomb quartz. 



4. Granulite like (1). 



5. Hallite (?). 



6. Granulite decomposed. 



7. Granulite decomposed including lenticular mas- 

 ses of actinolite decomposed and in same stratum 

 7 feet N. W. serpentine and quartz. 



8. Hallite (?). 



9. Granulite including lenticular actinolite. 



10. Soft green. (Serpentine ? Chlorite ?). 



11. White soft rock including curved crystals (of 

 serpentine ?). 



12. Soft serpentine. 



13. Hard serpentine. 



14. Concealed. 

 S. E. 15. Large masses of undecomposed granulite. 



About a quarter of a mile above the mouth of the stream is 

 Crump's quarry. Here the serpentine, rather light in color and 

 comparatively soft has been quarried, largely by machinery, toothed 

 wheels rotated by steam ])ower cutting deep grooves in the rock 



