geolg. quiz 7

fluid cascade of lava

Comparing these two photographs, which eruption has lower viscosity magma

Flood basalts influence life on Earth because

Large volumes of flood basalts are erupted during a short time Eruptions can release large amounts of gas that cool the atmosphere Eruptions can release large amounts of gas that warm the atmosphere

lava flows lava fountains

Shield volcanoes involve

common in lava flows associated with scoria cones

Some scoria cones are not accompanied by a lava flow and vice versa. Some lava flows squeeze out near the base of the scoria cone.

occurs in a lava tube

The surface of the lava flow solidifies to form a roof over the moving lava. Lava tubes insulate a lava flow, allowing it to flow farther. If a lava tube drains, it become a tube-shaped

composite volcano

This relatively large, symmetrical volcano contains interlayered lava flow, pyroclastic deposits, and volcanic mudflows

volcanic dome

This relatively small volcanic feature consists of solidified lava and some volcanic ash

→nmlkj none of these

This relatively small volcanic feature consists of solidified lava and some volcanic ash

shield volcano

This volcano is broad and low, and is composed of basaltic lava flow

shield volcano

This volcano is broad and low, and is composed of basaltic lava flows

scoria cone

This volcano is relatively small and composed of volcanic cinders

scoria cone

This volcano is relatively small and composed of volcanic cinders.

none of these

What kind of a volcano is Mount Rainier

One or more pyroclastic flows hit the city of Pompeii

What was the most damaging type of eruption that occurred at Vesuvius in Italy

They are large mountains with steep slopes

Which of the following is NOT true about shield volcanoes in the landscape

hill capped by volcanic rocks

Which of the following is least likely to be a volcano

shield volcano

Which of the following volcanoes is generally the largest

common in most calderas

a large circular depression with steep wall thick sequences of volcanic ash rounded mountains that are volcanic domes

eruption formed this felsic volcanic breccia

a lava that broke apart while it flowed

Composite volcanoes are so called

are composed of lava flows, pyroclastic material, and mudflows

depth gas bubbles have the most effect on magma

at very shallow levels, such as within the volcano

Hazards associated with basaltic lava flows and eruptions

burial of roads and neighborhoods by lava flows house fires floods from catastrophic melting of ice

main hazard of an eruption that forms a large caldera

burning, building collapse, and suffocation from an eruption column and pyroclastic flows

Eruptions on the islands of Santorini in Greece

collapse of a huge caldera that caused part of an island to disappear beneath the sea a huge ash column and pyroclastic flows destructive waves that traveled across the

The main cause of caldera collapse

collapse of the roof of a magma chamber as magma erupts

The classic volcano shape

composite volcano

The most dangerous type of volcano

composite volcano

lava fountain

eruption formed the small volcano in this photograph

viscous lava flow

eruption formed this flow-banded rhyolite

lava flow

fire fall photograph

Shield volcanoes have

fissure eruptions lava flows fire fountains dikes at depth

movement of North America over a mantle plume

interpreted to be the cause of volcanism at Yellowstone

picture with steam coming out

lava dome

volcanic mudflows

main hazard that Mount Rainier poses to Tacoma

rising mantle plume

origin for magma that forms flood basalts

subduction beneath the Pacific Northwest

plate-tectonic setting of Mount Rainier

eruption with short smoke

pyroclastic coulmn

composed of volcanic blocks and volcanic ash

pyroclastic eruption

eruption with long smoke

pyroclastic flow

composite volcano

relatively large, symmetrical volcano contains interlayered lava flow, pyroclastic deposits, and volcanic mudflows

volcanic domes

rounded hills inside the Valles Caldera

Some scientists think that Yellowstone could cause a future disaster because

the area is part of a caldera scientists think that magma is still present at depth past eruptions from Yellowstone carried ash over a huge area of western North America land near Yellowstone is uplifting in some places and subsiding in others

common to the eruptions of Vesuvius, Mount Pelée and Mount St. Helens

they are all composite volcanoes earthquakes before the eruption small eruptions of tephra pyroclastic flows

eruption formed the volcano

viscous lava and pyroclastic eruptions