Igneous Rocks and Volcanoes

"Volcanoes. View From Space - Klyuchevskaya, Russia. Shiveluch, Russia. 
Cleveland Volcano, Alaska. Mount Etna From Space. Mount Etna From Space."

Volcanoes Powerpoint

"Volcanic Eruptions and Hazards. What is a volcano? A volcano is a vent or '
chimney' that connects molten rock (magma) from within the Earth's crust to the ..."

Volcanoes Powerpoint

"Hawaii. Z. z. Z. Measuring the temperature. Heat suit. USGS photo by R.L. 
Christiansen Jan.9, 1973. vent. cone. magma chamber. conduit. A look inside the
 ..."