What is the difference between Hawaiian volcanoes and Mt St Helens?
Hear this out loudPauseThe two volcanoes are also different shapes: Kilauea is a gently sloping shield volcano, unlike Mount St. Helens, which is a steep-sided stratovolcano, also known as a composite volcano. This allows for different types of eruptions, with shield volcanoes being much less violent.
How different volcanoes are different?
Hear this out loudPauseLava Differences Composite volcanoes have a low magma supply rate, resulting in infrequent eruptions. Shield volcanoes feature basaltic lava. This type of lava is hot, fluid and low in gas content. Shield volcanoes are characterized by a high magma supply rate, lending itself to frequent eruptions.
Why are the two volcanoes in Hawaii so different?
This shimmy rearranged zones of magma that are heated under different pressures in the shallower part of the mantle — when they cool, the volcanic rock that results reflects this difference. Previously stacked on top of one another, the movement of the plates exposed now geographically separates magma zones that fed the volcanoes individually.
How many shield volcanoes are there in Hawaii?
Shield volcanoes are gently sloping mountains produced from a large number of generally very fluid lava flows. How many Hawaiian Island are there? There are 8 main islands, which make up the state of Hawaii (Hawaii, Maui, Oahu, Kahoolawe, Lanai, Molokai, Kauai and Niihau).
Where does the lava come from in Hawaii?
Steam rises as lava pours into the Pacific Ocean on the Big Island of Hawaii. Steam rises as lava pours into the Pacific Ocean on the Big Island of Hawaii. Over millions of years, volcanic eruptions have not only built the Hawaiian archipelago, they continually transform its landscape. Without volcanoes, there would be no Hawaii.
What makes Mauna Loa different from other volcanoes?
For example, Mauna Loa contains higher proportions of an igneous rock called pyroxenite, which comes from subducted ocean crust that typically melts at deeper levels than the model suggests.