Crater Basalt is a volcanic field of 9 cinder cones in the northern Patagonia region of southern Argentina 130 km SE of San Carlos de Bariloche.
The volcanic field covers an area of 700 sq km, and consists of cinder and spatter cones with many overlapping blocky basalt lava flows.
Igneous or magmatic rocks: The most primitive rock type forms when magma (molten rock) solidifies - either inside the earth (plutonic rocks) or during volcanic eruptions (volcanic rocks). A short overview.
List and interactive map of recent earthquakes world-wide.
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