Scientists examine an outcrop of ash in Hilo

Color photograph showing ash outcrop and two scientists

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. 


Image Dimensions: 2025 x 1509

Date Taken:

Location Taken: US