ISP 203B EXAM 2 Questions With Solutions
Cinder Cones - Small steep cones of scoria(products of mild explosive eruptions of basalt
magma) with large crater at the summit.
Shield Volcanoes - Very large, very broad (not steep) mountains mostly formed of basalt
lava flows.Have long old history o...
Cinder Cones - Small steep cones of scoria(products of mild explosive eruptions of basalt
magma) with large crater at the summit.
Shield Volcanoes - Very large, very broad (not steep) mountains mostly formed of basalt
lava flows.Have long old history of eruptions producing lava flows.
Strato-Volcanoes - Very steep, tall, conical mountains formed of strata (layers) of lava
flows and pyroclastic flows.
- Associated with dangerous ash clouds and pyroclastic flows.
- They may have lava domes at the summit.
Calderas - Very large voids formed by large explosions of magma that destroyed
previously existing volcanic shapes.
- Depressions that are often filled by lakes.
Typical Eruption Warning - Includes increasing seismicity (earthquakes)
- Increase in degassing
- Ground movements
, ISP 203B EXAM 2 Questions With Solutions
- Changes in ground temp.
- Small short-lived eruptions may announce a larger one
Typical Eruption Warning probs... - Most of these events are not followed by a major
eruption
- Evacuations are costly and if no eruption follows scientist credibility is reduced.
- However, lack of evacuation has been the origin of terrible volcanic disasters
Mt. Vesuvius - Strato volcano in S Italy
- Near populated Naples Italy
- Most famous for the Pompeii eruption in AD 79, which got buried in ash fallout and pyroclastic
flows
Large Volcanic Eruptions - Have the capability to affect the Earth's global climate, at least
for a few years.
- Very large ash clouds stall in the high atmosphere, where they block parts of the radiation that
Earth receives from the sun. Less radiation= Cooler temps.
- Volcanic gases can have similar affect
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