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 ." 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 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 . 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 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 , 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 . 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 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.

Monday, August 7th. Director: H. ARNOLD BEMROSE. The party drove to Station, and examined the shales with limestones. Posidoniella was found in the shales, and a gasteropod from one of the nodules of limestone. The quarry at Cromford in the upper cherty- and Productus-beds of the Mountain Limestone was visited, and Produaus giganteus, Pro­ ductus hemispluerieus, Streptorhynehus crenistria, a coral, and the tail of a Phil/ipsia were round. The composed of Kinder Scout Grit were next climbed, and a fine view of the sur­ rounding country was seen. The party drove via Middleton and Ryder Point to Grange MilL The bedded tuff at Shothouse Spring, and the vents of agglomerate near the Mill with two or three dykes were carefully examined, and the evidence of their origin discussed. The party proceeded down the Via Gellia examining the cal­ careous tufa quarry and walked up the hill through Bonsall to Pounder Lane. The members here examined the quartz rock, quartzose limestone, and agglomerate of Ember Lane, and returned over Masson Hill to the Hotel.

Tuesday, August 8th. Director: H. ARNOLD BEMROSE. The party drove to Tissington, and on the way a halt was made at Hopton to see partially dolomitized limestone, and a neck of Coarse volcanic agglomerate with several small dykes. On arriving at Tissington, the party walked along the New Rail- EXCURSION TO NOTTINGHAM. 225 way (by kind permission of the L. & N. W. Rly. Co.) and were accompanied by Mr. W. Hurst, the resident engineer. Sections in contorted and tufaceous Yoredale shales and limestones, and also the thick bed of tuff which in one place is exposed from top to bottom, were seen in the first cutting. Similar beds were seen in other cuttings as far as Crakelow, and in the latter cutting the thick tuff-bed was seen to be faulted against the Mountain Limestone. A climb to Crakelow Quarry was mad e, where nearly every bed of limestone is tufaceous. The rapid variation of the beds and intercalations of tuff were pointed out, and fossils were found in one bed of tuff. The party then walked to the Pe veril Hotel, Thorpe, and after tea they returned to Matlock, via Longcliffe, The castellated weathering of the dolomitized limestone was rem arked ; and near Longcliffe Wharf Station on the High Peak Railway, at a height of 1,050 ft., a halt was made to visit an interesting sand and fire clay pit in a hollow in dolomitized limestone. After dinner th e hearty thanks of the Association were given to Mr. Bemrose, Dr. Wheel ton Hind, Mr. Barnes and others, who had contributed so largely to the success of the excursion.

Wednesday, August 9th. D irector: H. ARNOLD·BEMROSE. The party went by train to Ambergate and walked to Cnch to see the faulted inlier and dome-shaped mass of Mountain Limestone. They were accompanied by Mr. Boag, the Manager of the Clay Cro ss Coo's Works. The evidence for the three faults was fully explained. Some time was spent in the quarry in obtaining fossils, and several minerals. The bed of sha le, some 220 ft. down in the Mountain Limestone, on which the landslip took place some years ago, was energetically examined for fossils. The Hill was climbed, the chasms due to the slip being passed on the way. From the summit of the Stand, or Tower, a fine view of the surrounding county was obtained. The descent to Wake­ bridge was made and the shale s in the brook-course seen. T he party then proceeded to Whatstandwell through quarries in the Millstone Grit. A pebble of foliated igneous rock found in the grit was obtained from a quarr yman. It measured nearly 6 inches in length. The party returned to Matlock by train.

EXCURSION TO NOTTINGHAM . Thursday, August roth, Directors: G. E. C OKE AND PROF. CARR. (l?,port hy F. Ml::ESon.) Thirty-five members left Matlock Bath for Nottingham. They then divided into two sect ions, one of which consisting of twenty-five members accompanied Mr. Coke, and through NOVEMBER, 1899.]