568 Notices of Memoirs — Dr. T. Wright ;— 



a thickness of at least 50 feet. The reddish or yellowish-brown 

 lower boulder-clay, which is often varied by a light bhiish or 

 greenish tint, contains the greatest number of large boulders. In 

 many places, from Penrith to Workington, and elsewhere, it attains 

 a great thickness. It has been mainly derived from the waste of 

 the volcanic rocks and Coal-measure shales of Cumberland. The 

 underlying bluish-grey clay rises to a height of at least 900 feet 

 near Troutbeck railway station. It may be traced in the railway 

 cutting not only between Troutbeck and Bassenthwaite lake, but 

 between Cockermouth and Workington ; between Marron Junction 

 and Bridgefoot, where it is distinctly overlain by the reddish-brown 

 clay ; south of Branthwaite station, at Ullock station, where it is 

 covered by a cargo of enormous boulders of sandstone, limestone, 

 porphyry, etc. — the latter surmounted by red clay, sand, and gravel ; 

 and in other places. I have not seen any decided blue clay much 

 farther north than the river Derwent. It would appear to have been 

 chiefly derived from the waste of the Skiddaw Slates. There can 

 be no doubt that in a great part of Cumberland, as well as in West 

 Yorkshire (see my paper on West Biding Drifts in the forthcoming 

 Proceedings of the West Biding Geological Society), there are four 

 boulder drifts, two or three of which are often found in vertical 

 succession, and the order of which is never found reversed. The 

 extent to which these drifts have been removed by denudation, and 

 the absence of sufficiently extensive sections, are probably the 

 reasons why no very decided instance, so far as I am aware, has yet 

 been discovered, in which all the four drifts are present. 



In a few months I hope to be able to- communicate an article, 

 with a map, on the Drifts and Glaciated Eock-surfaces of the 

 country between Whitehaven and Blackcombe, including the Eskdale 

 granitic area.^ 



^sroTioiES oip nvniEjnynoiias. 



I. — On the Correlation of the Jurassic Eocks in the Depart- 

 ment OF THE CoTE-d'Or, FrANCE, WITH THE OoLITIC FORMA- 

 TIONS IN THE Counties of Gloucester and Wilts, England.* 

 By Thomas Wright, M.D., F.E.S.E., F.G.S., etc. 



THE department of the Cote-d'Or, which forms the northern 

 portion of the Duchy of Burgundy, contains a very complete 



^ In Professor Harkness' paper on Shapfell Blocks in the Quart. Journ. Geol. Soc. 

 for November, it is stated that Shapfell granite does not occur in the Boulder-clay of 

 the Eden valley, though Criffell granite is found in this clay. The Eden valley clay 

 may have nearly ceased to accumulate before the high-level granite of "Wasdale Crag 

 began to be dispersed, and imbedded in the ■pinel or Boulder-clay of the mountains, 

 in which it is associated with polished and striated stones and boulders. {See article 

 on Shapfell Boulders, Geol. Mag., Aug., 1870.) 



2 Read at the Meeting of the Cotteswold Club, Aug. 31, 1869, and published in 

 the Proceedings for 1869, pp. 143-237. 



