MONOLITH OF VOLCANIC ORIGIN A monolith of volcanic origin is a large, single rock mass formed through volcanic processes. These structures usually consist of resistant igneous rocks that have remained intact while the surrounding weaker materials were eroded away. Monoliths stand prominently in the landscape and are important features in geomorphology, often serving as evidence of past volcanic activity. Monoliths of volcanic origin may form in several ways: > SOLIDIFIED MAGMA PLUGS (Volcanic Ne