An introduction to geological structures and maps / Введение в геологическое картирование и геологические структуры

Changes in ideas on teaching geological map interpretation for first year degree course level, and for ‘A’ level syllabuses, indicated that some modifications might be made to the latter part of this book. Apart from minor amendments and the updating of terminology, three main changes have been made. First, the topic of isopachytes (see p. 30) is generally taught in degree courses but is not to my knowledge dealt with in any book on geological maps. Problems of overburden isopachytes are introduced first, being applied to Map 9 and a redrawn Map 10, while bed isopachytes are covered by two new maps, 18 and 19. Second, rather more emphasis is placed on subsurface problems. Third, in the last decade maps set by several ‘A’ level examining boards have been line drawings based on geological survey (BGS) maps. Their solution depends not on the construction of structure contours but on broad interpretation of outcrop patterns. Of course, all maps should be approached in this way, first deducing the general structures before drawing any constructional lines. Three maps, one new to this edition, are based on geological survey maps and additional exercises on survey maps are included. Where possible, terminology has been explained in the text, but if necessary, readers can consult a specialist dictionary, such as Monkhouse and Small, A Dictionary of the Natural Environment, (London, Edward Arnold, 1978), or Whitten and Brooks, A Dictionary of Geology, (Harmondsworth, Penguin, 1978).

My thanks are due to colleagues named above for their continuing interest and helpful suggestions, to Dr D.E. Roberts and especially to Dr R. Pickering, and to Mr Carl Burness for drafting my new and amended maps to such a high standard. <...>