lava delta

USGS PHOTO GLOSSARY OF VOLCANIC TERMS
Lava entering the sea often builds a wide fan-shaped area of new land called a lava delta. Such new land is usually built on sloping layers of loose lava fragments and flows. On steep submarine slopes, these layers of debris are unstable and often lead to the sudden collapse of lava deltas into the sea.
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Photograph by C. Heliker on 12 November 1992.
The image here shows an aerial view of lava delta (center, left of volcanic fume) growing seaward at Kamoamoa on Kilauea Volcano, Hawai`i. The new land is about 450 m long and 180 m wide (from sea to old shoreline).
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Did You Know?
The partial collapse of a lava delta can be a hazard for people who venture too close to lava entering the ocean. For example, on April 19, 1993, one person was killed and 16 others injured when a section of an active lava delta on which they were standing collapsed into the sea at Kilauea Volcano, Hawai`i.

Glossary of volcanic terms. - University of Wisconsin Oshkosh. . 2001.

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