Global Volcanism Program | Image GVP-10647
A roadcut in the Roseau River valley on the outskirts of the capital city reveals deposits of the Roseau Tuff. This thick sequence of pyroclastic flows (sometimes welded), pyroclastic surges, and pumice-lapilli airfall deposits was erupted between about 40,000 and 25,000 years ago.
Photo by Paul Kimberly, 2002 (Smithsonian Institution).
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.