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ISP 203B EXAM 2 Questions With Solutions
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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...

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  • October 19, 2024
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  • 2024/2025
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  • isp 203b exam 2 questions with solutions

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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 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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