Long Excursion to Derbyshire: Wednesday, August 2Nd, To
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221 T EALL, J. J. H.-British Petrography , pp. z09, Z10, and Plat e IX. ARNOLU-BEMROSE,H.-" N otes on Crich Hill." Jou rnal ojthe Derby A nht1!o!ogicat and Na t. R ISt. Soc. .- "On the microscopical structure of the Carbonifer ous Dolerites and Tuffs of Derbyshire." Quart. J Ol/rn. Geol. Soc., vol. I, pp. 603-644, I pI. 18g6. BARNES, J., and HOLROYD, W. F.-" The Mountain Limes tone caverns of Tray Cliff H ill, Castleton, Derby shire, with some of their contained mineral s." Tra ns. Mal/chester Geol. Society, Part X, vol. xxiv. .--------------.-" On the occurren ce of a Sea Beach at Castleton, Derby shire, of Carboniferous Lime stone ag e." Trails. ,Vallch. Geol, Soc., vol. xxv, pp. Il9-IZ5. 4 pl., 1897. ----. Further notes on the Sea Beach in Carboniferous Lime stone. Derbyshi re, I bid., pp. /81-184, 1 pl., 1897. ----.-Reply to Pr ofessor H ull's criticis m on the paper s, "A Sea Beach at Castleton." Ibid., pp . 308-310, 1897. 1897: HIND, DR. W HEELTON.-" On the subd ivisions of th e Carboniferous series in Great Britain, and the true position of the beds mapped as the Yoredale series." Ceo!. Mag.,April and May, 1897. 1897. - " Section in Carboniferous Limestone shales at Tissington." North Stajfordshire Field Club Report, vol. xxxii, I pl. 1897. GEIKIE, Sir ARCHlBALD.-" Ancient Volcanoes of Great Britain," vol. ii, pp. 8-zz . 1898. ARNOLD-BEMROSE, H.-" On a Quartz Rock in the Carboniferou s Limestone of Derbyshire." Quart.J OUT1l. Geo!.Soc., vol. !iv, pp. 169 182, Z pl. 1899. ---------. - " Geology of the Ashbourne and Buxton Branch of the London and North Western Railway (Ashbourne to Crakel ow). " Quart. y ourn. Geol. Soc., vol. Iv, pp. 224-236, Z pI. ._u On a Sill and Faulted Inl ier in T ideswell Dal~ (Derbyshire)." Quart. J ourll. Geol. Soc., pp. 239-Z49, 2 pI. and section s, LONG EXC URSION TO DERBYSHIRE. WEDNESDAY, A UGUS T 2ND,TO THUR SDAY, AUGUST 10TH, 1899. D irectors: H. ARNOLD B EMROSE, :i\'I.A., F.G.S., WHEELTO::-r HIND, M.D., B.Sc. Lond., F.R .C.S., F.G.S., J. BARNES, F.G.S., G. E. COKE, F.G.S., AND PROF. C AR R, M.A., F.L.S. Excursion Se cretary ; FREDERIC K MEES0 1\', (Report by H. ARNOLD BEMROSE AND WHEELTON HI " n.) THE object of the excursion was to study the Lower Carboniferous rocks of Derbyshire. The visit to the Mill Close Lead Mine, and the excursion to Nottingham were added to the usual seven days excursion. The number of members attending the excursions varied from fifty-two to sixty-nine. The headquarters of the party were at the Royal H otel, Matlo ck Bath. N OVE MBER, 1899,] 17 222 LONG EXCURSION TO DERBYSHIRE. Wednesday, August znd. Directors : H. ARNOLD BEMROSE AND G. E. COKE. In the afternoon a visit was made to the Mill Close Lead Mine. Through the kindness of Mr. Alsop, every facility was given for the descent of the party, which numbered thirty eight. Six members went down the shaft which is being sunk in the Toadstone. A thin seam of coal in the Mountain Limestone was seen in the mine. The remaining members visited those portions of the mine which were in full work. They saw the junction of the limestone with the overlying shales, and the manner of occurrence, and the method of obtaining the ore, and on returning to the surface were shown the process of washing and separating it. The plans of the mine, and the very good collection of lead ore, calcite, fluor, and other minerals were examined with great interest. Afternoon tea was provided by the kindness of Mr. Alsop, and the party returned to Matlock by carriages. Thursday, August Jrd. Director: WHEELTON HIND. On alighting at Hayfield Station, the road layover the upper beds of the Millstone Grit and the intervening shales, along the Kinder Stream towards Kinder Scout. Arrived at the S.W. flank of the hill, on a plateau formed by the fifth bed of grit known as Farey's Grit, the equivalent of the Pendleside Grit, the Director indicated the chief feature s of the landscape formed by beds of the Third, Fourth, and Fifth Grits and the intervening shales . The top of Kinder Scout consists of a plateau of some extent, formed by the almost horizontal beds of the Fourth Grit, covered by deep beds of peat ; but the rocks appear weathered into fantastic shapes along the edges of the hill. Descending by Edale Cross, across the shales below the Fourth Grit, Farey 's Grit and its shales were passed over in succession, and special attention was called to a bed of large "bullions" or concretions in the stream at Barber Booth, which the Director considered an important horizon, mapable throughout North Staffordshire, Cheshire, Derbyshire, South-east Lancashire, and South-west Yorkshire, containing a rich fauna which passed up into the Gannister Beds of the Coal Measures, but not passing down into the Carboniferous Limestone. The Edale Valley was then crossed, the same beds being seen in stream sections on both sides, and an ascent made to Mam Nick, the entrenched camp on Mam Tor being noticed. At Windy Knoll, the cavern explored by Prof. Boyd Dawkins and others, which had yielded a rich mammalian fauna, was noticed, and the bed of elaterite and vein of fluor-spar in the quarry examined and collected from. Specimens of oolitic limestone, and limestone containing limestone pebbles, were examined from LONG EXC URSION TO DERBYSHIRE. 223 the walls, though the bed was not seen in situ. Passing down the gorge of the Winnats, some of the party stayed to examine the Speedwell Mine; also a bed of rolled shell-fragments indicating a contemporaneous beach, or a bed subject to wave action, the horizon of which is at the top of the "Massif" of Limestone. A visit was paid to the Great Peak Cavern, and the stream of under ground water passing through it was noted. W.H. Friday, August 4th. Directors: H. ARNOLD BEIlIROSE, WHEELTON HIND, AND J. BARNES. The day's work began with the examination of the fossiliferous quarry at the bottom of Cavedale, the horizon of which is practically at the top of the Limestone. Two sections showing the rolled shell bed were visited, and another fossiliferous quarry on the same horizon at the mouth of the Odin Mine. From this point a description of the physical features of the district was given, and then the shales containing Posidonieila keois, Aviculopecten papyraceus and Goniatites were examined, and the section of Mam Tor noted. The contact of limestone and shales was seen in a stream, but the Director pointed out that the shales had probably slipped. W.H. At the foot of the Winnats, Mr. Arnold Bernrose drew attention to the agglomerate near Goose Hill Hall, and pointed out how the igneous rock cut across the beds of limestone, and the reasons for considering it to be a vent. The Blue John mine was next visited, where The Ladies Walk, the Grand Crystallised Cavern, Lord Mulgrave's Dining room, and other interesting features of the mine were kindly described by Mr. J. Barnes. (See p. 179.) A detour to the village of Peak Forest was then made. Mr. Arnold Bemrose led the way to a small mass of intrusive dolerite which has been exposed by denudation in Darn Dale. The variation of the sill from a coarse ophitic dolerite to a fine-grained dolerite near the upper margin, and the very perfect marmorization of the overlying limestone, due to the contact of the igneous rock, were pointed out. Barmoor Quarry was examined, with brecciated limestone and beds with fish teeth. Mr. Smith Woodward gave an interesting account of the fish from these beds, and Psephodus and Psammodus were obtained. Passing the Ebbing and Flowing Well, a halt was made in the cutting in the limestone along the tramway, where the actual sequence of limestone and shales is to be seen, the shale with" bullions" occurred higher up in the cutting of the Manchester and Buxton Railway. W.H. 224 LONG EXCURSION TO DERBYSHIRE. Saturday, August 5th. Director: H. ARNOLl) BEMROSE. The party proceeded to Miller's Dale by train. The route taken was down the valley of the Wye as far as Tongue End, and then up Tideswell Dale to TideswelL The lava exposed in the bottom of the valley was examined and good junction specimens of the lava and overlying limestone were obtained at Rancher Tor. A considerable time was spent in Tideswell Dale in order to examine the faulted inlier of Mountain Limestone containing a sill intruded between lava-flows. Evidences for the faults and for considering the ophitic dolerite to be intrusive were pointed out in detaiL Specimens of baked clay, marmorized limestone, of the igneous rock, and Lithostrotion juneeum, Lithostrotion irregu Zare and Dibunopyllum were obtained. In the quarry, Mr. E. T. Newton gave a short address on the corals found in the Carboni ferous Limestone. After lunch at Tideswell, the party walked to Litton to see the laminated tuff contemporaneous with the lime stone. A very good coral bed was seen in the quarry near Peep o'-day. A return to Miller's Dale was made by carriages; and (through the kindness of Mr. Brierly, Director of the Buxton Lime Firms Co., Ltd.) the section near the Station was examined. Tufaceous limestone with a small lava-flow, coarse bedded tuff and a larger lava-flow, were seen intercalated with the limestone.