Stenceu : The Geology of NoeLx^nd Moor. 



51 



less than 700 feet above the sea, yon may search in vain for miles for 

 them. In order to account for this singular anomaly, my friend, 

 Capt. Aitken, of Bacup, has propounded a most ingenious theory, 

 that in the early part of the ice age these passes became filled with 

 local ice so as to effectually keep back the great sheet of ice coming 

 from the west. I believe that this did take place up to a certain, 

 height, but several new facts which I have come across lately convince 

 me that the great ice sheet did pass over the barrier of local ice, and 

 flowed through Calderdale. Only very recently I have found boulders 

 of encrinital limestone, highly polished, at a height of about 1,150 

 feet above the sea, at the edge of the moors near Pocket Well. This 

 m the first, and so far, only instance of high level drift having been 

 found on this side of the Pennine chain within the water shed of the 

 Calder. 



The neighbourhood has yielded many remains of pre-historic man^ 

 On the Grreetland and Norland Moors flint flakes and arrow heads, 

 ■&c., have been found, while on the Halifax side of the Calder, in a 

 line ranging from Shaw Hill to Highroad Well, and thence by Camp 

 End to Brockholes, and thence over Hunter-hill and Warley Moors 

 to Xab End, overlooking Oxenhope valley, very many remains of 

 pre-historic man have been found, and flint flakes in abundance. 

 Buried forests occur at West Vale, and very extensively on many of 

 our moors, especially on Fly Flat. 



ON THE PROPOSED NEW MAP OF YOPJvSHIRE 



FOR TSE 



YORKSHIRE NATURALISTS' UNION. 



Bw F. Arnold Lees, F.L.S. 



I. Object in view. — The great ends to be served by the map we 

 |)roject should first of all be clearly understood. I wculd define them 

 as a basis of discussion. 



. One intention — a minor end —is, I take it, that members of the 

 Union going upon an excursion into a new district may, by the map, 

 not only gain a clear idea of relative position, &c., but find it of 

 use as an itinerary by which to shape their course. Grant this, and 

 it follows the map must be of fair size ! In my experience no mnp 

 on a less scale than four miles to an inch is of much use in the field. 



