J. Stansjield — Hornhlendite at Cantley, Quebec. 307 



Hornblendite at Vavasour Mine, Cantley, Quebec. 



By J. Stansfield. 

 {By ^permission of the Directing Geologist, Geological Survey of Canada.) 



rpHE interesting rock-type hornblendite occurs at the Vavasour 

 -^ Mine, though it has only a very small development. It covers 

 an area of about 600 square feet and is cut by two of the apatite- 

 mica veins, which are so numerous at this locality. The rock was 

 incorrectly marked amphibolite on the map in Guide Book 3, 

 International Geological Congress, xii, 1913, facing p. 112. 



In the hand specimen it is coarsely crystalline and shiny black 

 by reason of the excellent cleavage of the hornblende. The only 

 minerals seen in the hand-specimen in addition to hornblende are 

 pyrite and an occasional speck or veinlet of a greenish mineral. 

 Under the microscoj)e, in addition to the green or greenish-brown 

 hornblende there is seen a small amount of a scapolite of low 

 birefringence, a phlogopite mica, a little sphene, and a grain or two 

 of black iron-ore. Augite within one of the crystals of hornblende 

 appears to indicate the relation of the rock to the gabbro of the 

 remainder of the hill, and the probable close genetic connexion of 

 the hornblende with augite. 



The chemical composition of the rock is given below : — 



On an Exposure of Sands and Gravels containing Marine 

 Shells at Easington, Co. Durham. 



By David Woolacott, D.Sc, F.G.S. 

 rpHE purposes of this short paper are to place on record and to 

 -*- bring to the notice of geologists a deposit of sands and gravels 

 containing numerous marine shells which is exposed on the Durham 

 coast north of Easington. Marine shells [Littorina, Cyprina, etc.) 

 have been collected before from sands and gravels lying above sea- 

 level on this coast,^ but the deposits containing them have usually 



^ Shells were collected at Marsden by Howse and others at 100-50 feet, 

 and also at Cleadon at 100 feet. I have collected shell fragments of Littorina, 

 Cyprina, and Cnrdium and one whole specimen of Littorina from the 

 Cleadon Sand Pit at 100 feet, and numerous entire specimens of Littorina 

 littorea and fragments of Cyprina from sands and gravels in Fulwell Quarries 



