Gänge sind die meist spaltenartigen, vertikalen Aufstiegswege von Magma innerhalb des Vulkans. Viele Gänge erreichen die Oberfläche nicht, d.h. führen zu keinen Ausbrüchen, sondern zu sogenannten Intrusionen, in denen das Magma langsam erstarrt.
Dikes are imaginable as the veins of a volcano, the pathways of rising magma. A dike is called a -usually more or less vertical- flat, sheet-like magma body that cuts unconformingly through older rocks or sediments.
Most dikes can be described as fractures into which magma intrudes or from which they might erupt. The fracture can be caused by the intrusion of pressurized magma, or vice versa, ... -> Ganzen Eintrag ansehen
