An outcrop on the W coast of Long Island reveals deposits from the last caldera-forming eruption. This catastrophic eruption in the mid-17th century deposited ash across the New Guinea highlands and prompted legends of a "Time of Darkness." This outcrop shows pyroclastic surge and Plinian airfall deposits of the Matapun formation, which is exposed at the top of the section beginning about 4 m above the geologists.

Photo by Russell Blong, 1975 (Macquarie University).

This image is made available under the Creative Commons BY-NC 4.0 license terms.

Galleries: Volcanic Outcrops

Keywords: outcrop | stratigraphy | geology | field work | volcanologist

Long Island