THE GEOLOGY OF THE WESTERN APPROACHES OF THE ENGLISH CHANNEL. II. GEOLOGICAL INTERPRETATION AIDED BY BOOMER AND SPARKER RECORDS

A geological map of about 1700 square miles of the sea-bed south of the Cornish coast between Bolt Head and Fowey was prepared by coring and dredging for rock samples; a boomer-sparker survey was then selected in relation to the supposed geology to fix more precisely the geological boundaries and to ascertain the geological structure of the rocks underlying the sea-bed, in this case to a depth of about 400 ft. The acoustic apparatus is described; the records are interpreted according to mathematical analysis and the probable limits of inaccuracy assessed. Ninety-one rock samples are described lithologically and the microfossils identified in all productive cases to give the stratigraphical ages. Pub. in Royal Society of London. Philosophical Transactions. Series B: Biological Sciences v248 n749 p315-51 Jan 14 1965 (Copies available only to DDC users). Limited number of copies containing color other than black and white are available until stock is exhausted. Reproductions will be made in black and white only.