88 Reviews — The Geological Record. 



The rocks include Wenlock Shales, Carboniferous Rocks, Bunter 

 Sandstone, Glacial Drifts and Post-Glacial Beds. Between the Base- 

 ment-beds of the Carboniferous rocks (red conglomerates, etc.) there 

 exists > " one of the greatest unconformities to be met with in the 

 British Isles," the Silurian strata having been cleaved, contorted, 

 and denuded before the overlying rocks were laid down. In the 

 pebbles of these Carboniferous conglomerates many Ludlow fossils 

 have been found. 



The principal formation described is the Carboniferous Limestone, 

 from which many fossils have been obtained. The Millstone Grit is 

 interesting, from the remarkable development of chert met with. 

 Mr. Strahan remarks that unlike the bands and nodules of chert in 

 the Carboniferous Limestone, this chert is probably a siliceous 

 sediment of extreme fineness ; for not only is it well stratified, and 

 evenly laminated, but, by a gradual lithological change, it passes 

 horizontally into a fine-grained quartzose sandstone, with bands of 

 chert, and finally into a quartz grit with quartz pebbles, in which 

 chert bands are quite subordinate. The Lower Coal-Measures and 

 Trias are briefly described. The whole of the low ground and the 

 flatter parts of the high ground are overspread by Drift-deposits 

 consisting of Boulder-clay and Gravels. The Post-Glacial Beds 

 comprise Calcareous Tufa, Peat and Alluvium, and Blown Sand. 

 In a Chapter on Economic Geology accounts are given of Lead and 

 Zinc Ores, Haematite, etc. An Appendix contains a list of works 

 on the Geology, etc., of Denbighshire and Flintshire, by Messrs. 

 Whi taker and Strahan. 



V. — The Geological Recoed. 



THE " Geological Record " was founded in 1874, with the object 

 of publishing a yearly register of all publications relating to 

 Geology, Mineralogy, and Palaeontology. The volumes for the years 

 1874 to 1878 have appeared with brief abstracts ; that for 1879 is in 

 the press. These have been prepared under the editorship of Mr. 

 William Whitaker, B.A., F.G.S., who has spared no pains, amid 

 many disappointments and delays, to render the volumes as complete 

 as possible. 



The British Association gives a grant in aid, suflicing for some 

 assistance, the correction of proofs, etc. The greater part of the work, 

 however, is done by geologists who give their help gratuitously. 

 There are no funds available for the purchase or exchange of pub- 

 lications. Hence the Editor is to a very large extent dependent on 

 the exertions of voluntary assistants. No doubt the delays have 

 tended to damp the ardour of many who have laboured on behalf of 

 the Geological Record. 



Mr. Whitaker has now retired from the position of Editor, and 

 Mr. William Topley, E.G.S., Assoc. Inst. Civil Eng., has bravely 

 undertaken to carry on the work. In order to bring the " Geologi- 

 cal Record " up to date, he has decided to issue one volume for the 

 five years 1880-1884 with titles only, and to resume the abstracts 

 for the year 1885. 



