Abstract
Most of the preceding sections have concentrated on sedimentary materials, which are stratified and readily organised into a sequence of map units. Each unit tends to have an overall tabular shape, being bounded at its top and bottom by roughly parallel surfaces, which enables three dimensional interpretations from maps and sections. We have, however, to be more cautious with non-sedimentary materials, for their shape can be much less regular. It is with these that this chapter is concerned.
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Selected further reading
Compton, R. R. (1985). Geology in the Field, New York, Wiley.(Has chapters on volcanic, plutonic and metamorphic rocks, parts of which are relevant to mapwork. )
Roberts, J. L. (1982). Introduction to Geological Maps and Structures,Oxford, Pergamon.(Chapter 6 includes a discussion on the portrayal of igneous rocks on maps.)
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© 1990 Alex Maltman
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Maltman, A. (1990). Igneous and metamorphic rocks; mineral deposits. In: Geological maps: An Introduction. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-6662-1_11
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DOI: https://doi.org/10.1007/978-1-4684-6662-1_11
Publisher Name: Springer, Boston, MA
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