NOTES ON THE GEOLOGY OF BEDFORD, ETC.—HARE. 309 
Londonderry Iron Mines and I. C. Railway at Blomidon and in 
the Cobequids we find the rocks 77 situ. 
Art. XIJ.—NotTES ON THE GEOLOGY OF BEDFORD, SACKVILLE 
AND HAMMOND’S PLAINS. By ALFRED HARE. 
Read May 9, 1881. 
During the course of the last Session, I have been engaged 
in an examination of the rocks of Bedford, Sackville, and Ham- 
mond’s Plains, on the days that were not class days. I found 
three formations, namely Archzean, Cambrian and Pleistocene. 
1. ARCHAAN. 
The Archean or what is believed to be Archzean, extends from 
the Birch cove lakes westward, crossing the Margaret’s Bay road 
about three quarters of a mile below Pulsifer’s and continues to 
below Wright's lake, westward to Saint Margaret’s Bay. I have 
not followed it any further. The granite appears to be unstra- 
tified. Itis very feldspathic ; some of the crystals of feldspar 
are very large, so that we are quite safe in calling it porphyrytice. 
I have only traced it so far as Indian River, but it appears to 
extend much farther. 
This formation also extends north-west of Halifax; Pockwock 
lake being about the most northerly point. 
2. (a) CAMBRIAN. 
This formation includes the gneissoid rocks, quartzites and 
argillites, it runs close up to the archzan. The gneissoid rocks 
are the only ones that touch the archzean in this part of the 
county. It contains py7ite in such quantities as to colour the soil 
in some places where there is a wash from the hills. At this 
season of the year it forms quite a deposit of iron oxide, so much 
so as to induce some to search for iron beds north of the gneis- 
soid rocks, the argillites come in and continue much farther 
north than I have examined ; next to the gneissoid rocks the 
