Dictionary of Geotourism

2020 Edition
| Editors: Anze Chen, Young Ng, Erkuang Zhang, Mingzhong Tian

Intrusive Body; Intrusion

Reference work entry
DOI: https://doi.org/10.1007/978-981-13-2538-0_1170

Intrusive body is a general name for a rock mass that is formed by the cooling of magma that intruded into the crust. Intrusive rocks have several modes of formation. For example, sills, laccoliths and lopoliths intrude along the surrounding rock layers, whereas dykes, stocks, bosses and batholiths intrude oblique to or cut across the layers of the surrounding rock.

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