Image by Charlie Bacon, USGS / Alaska Volcano Observatory. Charlie's orange overalls help the pilot find him on pick-up day. The backpack contains food and survival gear, and a two-way radio to call his helicopter pilot. Scientists in Alaska often carry firearms (foreground) and pepper spray as protection against grizzly bears. This map will show the areas covered by past lava eruptions and can be used to estimate the potential impact of future eruptions. Mapping lava flows: Charlie Bacon, a USGS volcanologist, draws the boundaries of prehistoric lava flows from Mount Veniaminof, Alaska, onto a map. Geologists search for fuels and minerals, study natural hazards, and work to protect Earth's environment. It is also concerned with the organisms of the planet and how the planet has changed over time. The word means "study of the Earth." Geology deals with the composition of Earth materials, Earth structures, and Earth processes. Snelson and others are doing to learn about Mount Erebus. Photo courtesy of Martin Reed, the National Science Foundation and the United States Antarctic Program. She uses the data to prepare maps of the volcano's interior. Vibrations from the explosions travel into the Earth and reflect off of structures below. Catherine Snelson, Assistant Professor of Geophysics at New Mexico Tech, sets off small explosions on the flank of Mount Erebus (a volcano in Antarctica).
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