42 GEOLOGY. 



describing the relations of this deposit to that of others in the Thames 

 valley. The Cyrena-beds of Ilford, Grays, Erith, and Crayford he re- 

 gards as of the same age, all being referable to the time when the 

 drainage of the Thames valley flowed southwards into the Weald. The 

 subsequent upheaval of the Wealden district accounts for the height 

 (80 or 90 feet) at which the Crayford brick-earth lies. W. T. 



Woodward, H. E. Glaciation of the South- West of England. Geol. 

 Mag. dec. 2, vol. i. pp. 335, 336. 



Mentions the discovery of Boulder Clay, overlying Greensand, on the 

 high ground about two miles N.N.E. of Yarcombe, and between Honi- 

 ton and Chard. He also refers to the deposits of flint and chert on the 

 tops of tie Greensand hills, and suggests that these, too, may be due to 

 marine action during the glacial submergence. W. T. 



. Kemarks upon the Eolations and Grouping of the Permian 



and Triassic E-ocks. Geol. Mag. dec. 2, vol. i. pp. 385-390. 



The author refers to the lithological resemblance between the Per- 

 mian and Triassic rocks, which sometimes makes it difficult to determine 

 to which group certain beds belong. He reviews the evidence upon 

 which an unconformity is inferred between the Carboniferous and the 

 Permian, and also between the Bunter and the Keuper ; and he thinks 

 that these unconformities are local. !N'ear Nottingham the Lower Bunter 

 is continuous with the Permian, without any traces of unconformity. 



The coast-section between Seaton and Exmouth is described ; the 

 whole series (including the Budleigh-Salterton Pebble-beds) might 

 perhaps be termed Keuper ; but, owing to the great thickness, there is 

 some justification in thinking that the Muschelkalk may be represented 

 as well as the Bunter, and by sediments of a diff'erent character. The 

 author suggests that future researches may lead to a resumption of the 

 term " Poikilitic Series," to embrace the beds between the Coal Measures 

 and the Rhsetic Beds. W. T. 



Rhsetic Beds near Newark. Geol. Mag. dec. 2, vol. i. p. 480. 



Notices the occurrence of Phaetic Beds at Barrow-on-Soar, where 

 there is a hard bed above the unfossiliferous grey marl which rests on 

 black shales. On deepening a Lias quarry near Newark a hard bed 

 was found, not unlike the " Sun-bed" of the West of England. This 

 probably is homotaxeous with the hard bed at Barrow. The thickness 

 of the Phaetic Beds at Newark is estimated at 50 feet. W. T. 



. A Pamble across the Mendip Hills. — No. I. of "■ Popular 



Papers on Geology." Geol. Mag. dec. 2, vol. i. pp. 481-492. 



The formations along the route and in its neighbourhood are described, 

 also the scenery and general physical features. Between Bath and 

 Chewton Mendip the Liassic and Oolitic rocks are described, and also 

 the Coal Measures of Padstock. On the Mendips there is Carboniferous 

 Limestone and Old Bed Sandstone. Between Wells and Yeovil there 

 is Lias ; the main mass of the Inferior Oolite is reached at the latter 

 town ; but there is an outlier of the same at Glastonbury Tor. There 

 are notes on the old lead- and zinc-mines of the Mendips. W. T. 



