The district fot invest ia.ition is included in Sheets 



CiRC- 106. 



BOOKS AND MAPS.- 



93 S.E. and 94 S.W., one-inch Ordnance Maj) (also published geologically colored). 

 There is an account of the last Excursion of the Union to Pocklington in the 

 'Naturalist' for 1885, pp. 307 — 309. 



MYCOLOGISTS are cordially invited to visit Yorkshire and join in the 

 investigations. The following gentlemen have already intimated their intention 

 of being present:— Mr. George Hassee, of the Royal Herbarium, Kew; Mr. 

 Carlton Rea, M.A., LL.B., of Worcester ; Mr. H. T. Soppitt, of Bradford ; Mr. 

 Chas. Crossland, of Halifax ; Mr. A. Clarke, of Huddcrsheld ; Mr. J. W. Sutcliffe, 

 of Halifax; and Mr. W. Norwood Cheesman, of Selby. 



Mr. Massee will arrive on Monday night in readiness for a preliminary ramble 

 on Tuesday. ]\f embers desirous of joining him on that day may ascertain particulars 

 from the Secretaries. 



^ WEDNESDAY'S PROGRAM ME. -Leave Pocklington Station on the 

 arrival of the 10-54 train, and proceed to Allerthorpe Common. Leader, Mr.W.Wox. 

 Meat Tea (2/- each) will be provided at the Feathers Hotel on returning, 

 after which the evening will be devoted to the arrangement of the Show.' 



FUNGUS SHOW.— An ExiinilTiON of EuN(;i, iu the large room at the 

 Feathers Hotel, will be arranged on Wednesday Evening. Parcels of Fungi from 

 other parts of Yorkshire will be very acceptable if packed in boxes with moss or 

 bracken {not in paper) and sent caninge paid so as to reach Pocklington not later 

 than Wednesday noon ; localities to be stated. 



The Secretaries would be particularly glad to hear from members who intend 

 to be present and arc willing to assist in arranging the Show. 



THURSDAY'S ROUTES.— 



I. — Leave Pocklington Station at 10-54 for Allerthorpe Common and Thornton 

 Plantations, returning by Manor Farm and fish pond to Pocklington. 



II.^Lcave Pocklington as above and proceed to Kildwick Percy. 



HL^ — Geologists arc advised to leave the train at Nunburnholme, proceed in 

 the direction of Warter, passing through the grounds of the Priory, and working 

 back through Kildwick to Pocklington. 



Routes I. and H. will be under the guidance of Mr. W, Wox and Mr. G. 

 Steels. The Mycologists will probably take Route H. 



GEOLOGY.^This Section will be officially represented by Mr. |.W. Stather. 



The Hon. Secretaries of the Geological Section, Messrs. W. L. Carter, F.G.S. 

 and J. W. Stather, E.G. S., write as follows : — PockUngton is situated just outside 

 the western fringe of the Chalk Wolds, the town itself being on the Kcuper beds 

 (Upper Trias) of the Vale of York. In the short distance of a three miles' walk 

 the narrow outcrop of the Lower Lias beds is crossed, and suddenly we come upon 

 Upper Cretaceous beds, the Upper Lias, the whole of the Oolites, and the Lower 

 Cretaceous (Ncocomian) being absent in this area. The amount of denudation 

 which thus is shown to have taken place in the middle of the secondary period 

 receives further corroboration from the fact that at a little distance to the north, 

 both near Millington, and at Kirkby Underdale and Acklam, small patches of 

 Oolitic deposits remain, relics of great masses of strata which once overlaid the 

 whole district. Taking the beds likely to be seen during the excursion, in ascend- 

 ing order, we must mention 



(i) The Keuper Marls, upon which Pocklington stands. In Grimthorpe 

 wood, two miles to the north, a section is seen, and also at Owcsthorp Mill, one 

 mile to the north. There is also a good section in a brick-yard, close to the rail- 

 way, about a mile from Pocklington. 



{2) Lower Lias.— In East Yorkshire the Lias is everywhere conformable to 



the under-lying Keuper, and can be traced in a narrow strip along the edge of the 



Chalk escarpment. Search should be made for a representative of the Rha-tic 



beds, intermediate between the Keuper and Lias, in any section examined. The 



Lias beds arc characterized at certain horizons by a predominance of some particular 



species of Ammonite, forming a series of zones or bands which are easily identifiable 



by their s])eciai fossil contents. In tracing the stream up from Kunburnholme to 



Warter, the zone oi Aiiivionites planorbis will be found, the oyster-beds being fust 



seen, and afterwards the blue clays and marls of the same zone. The Angidatiis 



zone is seen in quarries between Millington and Pocklington, The over-lying 



btuklaiidi and jamesoui 7.ot\q.% are found in order as the valley is ascended towards 

 W^arter. 



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