Chemical analyses shed light on possible origins of island ash deposits

image related to volcanoes. See description

Detailed Description

USGS Hawaiian Volcano Observatory scientists examine an outcrop of reddish-brown Hilo ash during a recent study to investigate the origins of volcanic ash deposits on the Island of Hawai‘i. Age dates of lava flows above and below the Hilo ash deposit indicate that the ash was erupted between 3,000 and 14,000 years ago. USGS photo by Z. Tamashiro.


Image Dimensions: 2025 x 1509

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