Why is it called a shield volcano?
Illustrated Volcano Glossary Shield volcanoes are volcanoes that mainly erupt fluid (usually basaltic) lava flows that are able to travel over long distances and thus construct over time broad, gentle slopes. They are called shield volcanoes, because they resemble the shape of a warriors’shield.
How dangerous is a shield volcano?
The lava flow from a shield volcano eruption is largely composed from basaltic magma. The lava features a low viscosity and erupts in a relatively gentle stream. Therefore, shield volcano eruptions generally do not pose a threat to human lives, as the lava flow is easy to predict and avoid.
What is a famous shield volcano?
Examples of shield volcanoes are Kilauea and Mauna Loa (and their Hawaiian friends), Fernandina (and its Galápagos friends), Karthala, Erta Ale, Tolbachik, Masaya, and many others. Here are 4 of the volcanoes that comprise the big island of Hawai’i.
Are shield volcanoes always active?
Active shield volcanoes experience near-continuous eruptive activity over extremely long periods of time, resulting in the gradual build-up of edifices that can reach extremely large dimensions. With the exclusion of flood basalts, mature shields are the largest volcanic features on Earth.
Which type of volcano is the least explosive?
basalt plateau
What is the range of shield volcano height?
1,500 to 2,000 feet
Which kind of eruptive activity is highly explosive?
geo quiz 6
| Question | Answer |
|---|---|
| Spreading center volcanism most generally produces rocks that are ________. | basaltic in composition |
| Which kind of eruptive activity is most likely to be highly explosive? | eruptions of big, continental margin, composite cones or stratovolcanoes |
Why do cinder cone volcanoes have steep slopes?
most common and they form from explosive eruptions of pyorclastic material followed by lava flowing quietly. They have a broad baseand sides that get steeper as the volcano goes up. The cinder cone has steep sides because they sides erode quickly because the pyroclastic material isn’t cemented in very well.
Do cinder cones have gentle slopes?
Shield volcanoes are huge, gently sloping volcanoes. Cinder cones are small, cone-shaped volcanoes.
What is the best reason why lava isn’t a threat to human life?
What is the best reason why most lava flows aren’t a threat to human life? Lava flows usually don’t flow very quickly, so people can outrun them.
Why are volcanoes called active even when there is no eruption?
Question: Why are volcanoes called active even when there is no eruption? An extinct volcano will not have had any eruptions in the last few thousand years and is not considered able to erupt every again. So we use “active” to mean a volcano that *can* erupt or *is* erupting.