noun
contact metamorphic aureole; contact aureole
Technical term in geology for the zone of altered rock surrounding an igneous intrusion.
花崗岩の周囲には接触変成帯が形成されることがある。
A contact metamorphic aureole can form around a granite intrusion.
Compound of 接触 (contact) + 変成 (metamorphism) + 帯 (zone/belt). The term is a direct calque from English 'contact metamorphic zone'.