Jurassic or Triassic : Intrusion of small localized bodies of magma in southern Arkansas, which crystallized to form igneous rocks.
(small localized bodies of magma in southern Arkansas; crystallized; to form igneous rocks) Context(small localized bodies of magma in southern Arkansas crystallized,List([36, 108))):(small localized bodies of magma in southern Arkansas; crystallized to form; igneous rocks)
small localized bodies of magma in southern Arkansas crystallized,List([36, 108))
small localized bodies of magma in southern Arkansas small localized bodies of magma in southern Arkansas
crystallized crystallized to form
to form igneous rocks
igneous rocks