268 MR. H. H. ARNOLD-BEMKOSE ON [Aug. I907, 



and finally dip at an angle of 20° in a south-easterly direction 

 towards the eastern brook. Similar beds of limestone are again 

 seen in the western bank of the same brook dipping 15° south- 

 eastward. 



The following succession of beds in the Yoredale Shales was seen 

 in the brook-course west of this vent : — 



Section in the brook west of Woodeaves Vent, going down stream and 

 down in the series. 



Thickness in 

 feet inches. 

 Shales, with a few thin limestones, dipping south- 

 westward 12 to 20 



Limestone , 8 



Shale 3 



Limestone and shale 2 



Small gap. 



Shale, dipping 20° south-westward 5 



Limestone 2 



Shale, with limestone . 2 



Shale with a thin limestone 10 



Limestone 3 



Shale 3 



Limestone 2 



Shale (confused) about 6 



Limestone, with Productus and encrinite-stems 2 3 



Shales 7 



Black limestone, nearly vertical, striking north- 

 north-westward 1 4 



Shales, with a few thin limestones 8 



Shale 1 6 



Limestone ... 3 



Shales 2 6 



Limestone, with shale-partings 2 



Limestone , 2 



Shale 4 



Limestone 8 



Shale 11 



Limestone 1 4 



Shale 8 



Black limestone, dipping south-west by west 6 



Black limestones, which at first dip west-south- 

 westward, roll over in an anticline, and then 



dip steeply 30° east-south-eastward 8 



Total 89 8 



The beds then become vertical, and strike down stream in 

 a south -south- easterly direction, the dip lessening in steepness 

 (west-south-westward) ; they roll over in a small anticline with 

 its axis pointing north-north-westward, and dip towards the vent 

 at an angle of 60°. 



The agglomerate is seen on the opposite or east side of the 

 stream. Good sections which appear in the brook-banks and on 

 the higher ground consist mainly of rounded blocks of igneous 

 rock, varying in size from 1 inch to nearly a foot in diameter. 

 Between the blocks, and often adhering to them, is a mass of small 



