Geosite Muara Sibandang, Post-Calderic Volcanism

Kubah dasit diekstrusi di bagian barat daya Danau Toba di sepanjang beberapa sesar. Mereka termasuk kompleks kubah eksogen yang terdiri dari Kepulauan Sibandang, dan dua kubah lagi di daratan yang berbatasan langsung dengan Pardepur.

Dacitic domes were extruded in the south-western portion of Lake Toba along several faults. They include an exogenous dome complex which comprises Sibandang Islands, and two more domes onshore directly adjacent in Pardepur.