106 Mr. Farey*s Geological Olservations In Yorkshire, &fe, 



were found ; to the W, also, Founders' Sand is got atGI«tS5-. 

 Houghton and Wereldon or Weldale), Brotherton, Fairburn 

 (Red JVlarl and Gvpsum S\V and W, as above mentioned), 

 Ledston E, Micklefield, Abbcrford, Potterton E, (here and 

 at Whinclose one mile N, near Bramley Park, a white Clay 

 is found, wit!) Galliard or Crowstone-like beds in it, and a 

 white tender Grit- stone or Sand at Eramley-moor Quarry, 

 and at the SC corner of Bramley-Park ; a patch of Clay 

 on the Limestone SE of East-Kigton, belong also I expect 

 to the anomalous beds between these Rocks), Bramham 1^ 

 mile E, (a very heavy and curious sparry bed about two feet 

 thick, on the Limestone under Mr. Joseph Bovill's Farm, at 

 the NE end of Bramham Town, belongs perhaps to the 

 anomalies of these Marl beds),Toulson (on thebanks of the 

 Wharf River about a mile below Thorpe- Arch, beds of Red 

 Marl and some Gypsum layers appear, and this Marl seems 

 to make a red clay surface on the Lime, N of Thorp-Arch), 

 Bllton (here Gypsum is found, see Mr. James Sowerby's 

 British Mineralogy, Tab. 234), Tockwith, Kirk-Hammer- 

 ton, Green-Hammerton (at the latter place Gypsum is dug, 

 as I anv informed, and between them the Gypsum and Sul- 

 phate of Strontian is found, I believe, and in this stratum, 

 that Mr. James Sowerby has figured and described in the 

 last number of his ''British Mineralogy," Tab, 444, though 

 said by its discoverer to be had from the banks of theNidd 

 near Knaresborough, which is 8 miles off. 



A more particular survey of the western side of the Yel- 

 low Lime district, would I doubt not, discover many other 

 curvous and anomalous substances, that might be referred 

 to the beds between the upper and lower Rocks of that 

 scries. The establishing of local Geological Societies, such 

 as I have recommended p. 217, and others of my Derby- 

 shire Report, would prove of the most essential service in 

 promoting and methodising the several inquiries which I 

 have herein suggested, and many others not less important, 

 that will occur to all those who apply seriously to the in- 

 vestigation of the facts of the Terrestrial Stratification, a 

 pursuit in which utility will be found eminently united with 

 the highest species of gratification. 



I am, sir. 

 Your obliged and very humble servant, 



I7pper Crown Street, Westminster, JOHN FaREY Sen. 



february 9, 1812. Mineral Surveyor. 



XVI. De. 



