274 PROCEEDII^GS OF THE GEOLOGICAL SOCIETY. [Apr. 16, 



they will give further evidence in favour of the theory that the 

 greater part of the Grejwethers have come from that formation ; 

 for patches of them occur in many places along the Chalk-range of 

 Kent, in which, and on the surface of the older cretaceous beds rising 

 from its base, there are many greywether-blocks, that in this case 

 would here, as near Marlborough, have some connexion with the 

 range of the Bagshot Beds, being more plentiful where that Series 

 is least separated from the Chalk. 



I have noticed the sands of N'etley and Headley Heaths but shortly. 

 A more detailed account of them will be given in a memoir (now 

 preparing) to illustrate Sheet 8 of the Map of the Geological Survey 

 of Great Britain. All that is needful here is to note the bearing 

 that they may have on the Greywether-question. 



3. On a Deposit with Insects, Leaves, 6fc., near Ulveeston. 

 By John Bolton, Esq. 



[Communicated by the President.] 



The deposit described in this communication has been sunk through 

 during the progress of works undertaken by the Lindale Cote Iron- 

 ore Company, for drainage-purposes. The mines are situated in the 

 well-known haematite district of Low Furness, about three miles 

 S.W. of XJlverston, in a valley between two ranges of low hills 

 belonging to the Mountain-limestone series. The physical geology 

 is varied in character, — a fine sequence of the following beds in 

 descending order from the Upper Silurian occurring in the hills 

 lying north of this valley, viz., Lower Ludlow Kocks, Upper Ireleth 

 Slates, Lower Ireleth Slates, Coniston Grit, Coniston Flags, Conistan 

 Limestone (equivalent to the Bala Slates), and Green Slates with 

 Porphyry, which last rocks extend northward for many miles beyond 

 the boundary of Furness. South of the valley in which these mines 

 are situate, the Mountain-limestone is developed on a large scale, 

 being upwards of six miles in breadth. The exact position of Lindale 

 Cote Mine, upon the promontory of Furness, is about halfway be- 

 tween Morecombe Bay and the estuary of the Duddon. 



In sinking shafts to a water-way driven from the Lindale Cote 

 to Urswick Tarn, in 1855, down the course of a vaUey lying about 

 100 feet below the table-land, and receiving the drainage of about 

 600 acres, a deposit of greenish-drab clay, six feet in thickness, was 

 met with at a depth of forty feet from the surface, in the shaft nearest 

 but one to the mines, and at the highest " level." This clay-bed 

 contained pieces of unfossilized wood, associated with numerous leaves, 

 seed-vessels, and other vegetable remains. Among the few which 

 can be determined are, leaves of Beech, with the epicarp of the fruit- 

 receptacle, and a well-preserved branch of Sphagnum. A few well- 

 preserved Insects also occurred in the deposit. Of these some have 

 been determined by Mr. Stainton, F.G.S., as fragments belonging 



