421 



impossible in an abstract to describe tlie complicated j^mZ^s that 

 everywhere intersect this field, and by which the limestone is in two 

 instances brought up to the surface. The coal beds, worked within 

 it, are five in number, and are described, in descending order, un- 

 der the following names : (1.) Metal Band; (2.) Two-feet Band; 

 (3.) Yard Band; (4.) Four-feet Band ; (5.) Yendale Band. By help 

 of a transverse section to Castlerigg, this field is connected with the 

 upper division of the coal measures; in as much as pits have been 

 sunk near that place, through the great beds of the upper division, 

 down to the tixo-feet hand ; thus giving a consistency and unity to 

 all the sections. 



The authors next describe the Workington field, bounded to the 

 south by the greaX. Jaidt which brings in the lower division of the 

 Harrington field ; and to the east and west by the sea and the turn- 

 pike road. The river Derwent was formerly regarded as its north- 

 ern boundary ; but the main band unfortunately thins out a little to 

 the south of Workington, and thereby contracts the extension of the 

 valuable part of this field. Nearly all the beds worked in this field 

 belong to the upper division ; and their general agreement with the 

 Whitehaven bands of coal is proved by detailed sections ; especially 

 from the sinkings at Henry Pit near the mouth of the Derwent. 

 The principaiyaw/^s traversing this district, the outcrops of the prin- 

 cipal bands of coal, and the extension of the works under the sea 

 are described in some detail. Several other small divisions of the 

 great field are then noticed: viz. the Starmire, Keekhill-Side, 

 Brownrigg, Branthwaite-Edge, Gillgaron, and Graysouthern fields ; 

 after which the authors proceed to describe the phenomena on the 

 north side of the Derwent. 



To the north of the Derwent, there is near the sea-coast a sterile 

 region, partly occupied by the lower red sandstone, and partly by 

 the upper division of the coal measures, in which the main coal is 

 wanting ; a fact connected with the thinning off of the main band 

 to the south of Workington. In a very extensive field, commencing 

 a little to the N. of the village of Seaton, and extending over Brough- 

 ton Moor, and from thence to Dearham, two beds of coal (known by 

 the w2ivae&o£i\ie^Hen-quarter band" and the ^'kernel and metal band") 

 have been very extensively worked, and are identified with the " ban- 

 nock-band" and " main-band" of Whitehaven and Workington. 

 The relations of the several parts of this extensive tract of country 

 are exhibited in detailed sections, of which it is very difficult to 

 convey a notion in a mere abstract ; and the works carried on 

 within the mare, with very limited exceptions, referred to the 

 upper division of the Whitehaven field. 



The coal bands exhibited in the works near Gillerux, Aspatria, 

 Plumland, and Weary Hall are then described; and detailed sections 

 are given of the works in the Bolton field, — generally regarded as the 

 north-eastern limit. There is, however, an unexplored tract to the 

 east of a great fault which forms the northern limit of the Bolton 

 field ; and, in the neighbourhood of Rosley, a seven-feet coal (un- 

 doubtedly a member of the upper division) was formerly worked j 



