AmpthUl Clai/ in t/w lyoulder-Clatj at ])uj<jleswade. (lof) 



In conclusion, the relation of some of these structures to an 

 eutcctic composition is discussed. It is not, however, easy, owing 

 to the complexity of the conditions, to come to any very definite 

 conclusions in the case of old rock-masses. 



2. 'Geology of the Ashbourne & Buxton Branch of the London 

 & North-Western Railway : — Cralic Low to Parsley Hay.' By 

 Henry Howe Arnold- Bemrose, Esq., M.A., P.Cx.S. 



The present paper is a continuation of one published in 1899, and 

 deals with the geology of the next S miles of this railway. After 

 piissing through Yoredale Shales in the second cutting (No. 10), the 

 railway enters the thick beds of Mountain Limestone, in which it 

 continues as far as Buxton. The latter rock is frequently folded, 

 and owing to this no very great thickness of limestone is seen. It 

 was not found possible to correlate the beds in the different cuttings. 

 The following cuttings are described: — (9) Crakelow Parm, (10) 

 Newton Grange, (11) Moat Low, (12) New Inns South, (13) New 

 Inns, (14) Alsop-en-le-Dale, (15) Nettly Low, (16) Cold Eaton, 

 (17) Cheapside, (18) Bank House, (19) Heathcote, (20) Hand Dales, 

 (21) Caskin Low, (22) Lean Low, and (23) Parsley Hay; and measured 

 sections are given of several of them, with an account of the folding 

 and other features displayed. The Newton-Grange cutting shows 

 6 feet of tuff, probably a thin representative of the 140-feet seam in 

 the Tissington cutting. The limestones are in places granular, 

 oolitic, or dolomitized, and microscopical accounts are given of the 

 several varieties, as well as of the encrinital limestones, pellets and 

 pebbles in the limestones, and the calcareous tuff. 



June 24th.— Sir Archibald Geikie, D.Sc, LL.D., F.H.S., 



Vice-President, in the Chair. 



The following communications were read : — 



1. 'On a Transported Mass of Ampthill Clay in the Boulder- 

 Clay at Biggleswade (Bedfordshire).' By Henry Home, Esq. 



The section described was exposed in the construction of a w ell 

 2 miles south-south-east of Biggleswade Railway-Station. Under 

 1U| feet of soil and Boulder-Clay, the Ampthill Clay was penetrated 

 for 67 feet, resting on Chalky Boulder-Clay, fine silty clay, dis- 

 turbed Gault, and Lower Green sand. The clay is lithologically 

 identical with the Ampthill Clay with its selenite-crystals, and 

 contains Ammonites excavatus, often covered with Serjmlce, but no 

 abundant examples of Ostrea deltoidea. The boulder was probably 

 an outlier, situated in Oxford Clay at a level high enough to be 

 ploughed into by the agent which formed the Glacial Drift. The 

 distance from Avhich it was moved may Jiot have been greater than a 

 mile or two, but on this point no definite opinion can be expressed. 

 The septaria in it have a dip of 9^. The extent of the mass has not 

 vet been ascertained. 



