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ERUPTIONS 3

Submarine Eruption

Keys:
1. Water vapor cloud 2. Water 3. Stratum 4. Lava flow
5. Magma conduit 6. Magma chamber 7. Dike 8. Pillow lava

A type of volcanic eruption that occurs underwater. An estimated 75% of the total
volcanic eruptive volume is generated by submarine eruptions near�mid ocean ridges�alone,
however because of the problems associated with detecting�deep sea�volcanics,
they remained virtually unknown until advances in the 1990s made it possible to observe them.

Subglacial Eruption

Keys:
1. Water vapor cloud 2. Crater lake 3. Ice 4. Layers of lava and ash
5. Stratum 6. Pillow lava 7. Magma conduit 8. Magma chamber
9. Dike

Are a type of volcanic eruption characterized by interactions between lava and�ice, often under a�glacier.
The nature of glaciovolcanism dictates that it occurs at areas of high�latitude�and high�altitude.

Phreatic Eruption

Keys:
1. Water vapor cloud 2. Magma conduit 3. Layers of lava and ash 4. Stratum
5. Water table 6. Explosion 7. Magma chamber

A type of eruption driven by the expansion of�steam. When cold ground or surface water come into contact
with hot rock or magma it�superheats�and�explodes, fracturing the surrounding rock�and thrusting out a mixture
of steam,�water,�ash, volcanic bombs, and�volcanic blocks.

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