igneous rocks
TRANSCRIPT
Igneous Rocks
Rock Cycle
Pyroclastic flow
New lava dome
Pahoehoe lava
Aa lava
Columnar joints
Vesicular lava
Mauna Loa
Illustration by J. Johnson
Whin Sill High Force
Tertiary dyke cuts Permian rocks: Arran
granite
basalt
dolerite
gabbro
peridotite