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Basaltic lava flows form from mafic magmas located blow the earth's surface. These lava flows, when crystallized, will produce rhyolite and dacite. Intermediate compositions-- that is, a mixture of felsic and more of mafic magmas-- will produce andesitic rock. Types: Tholeiitic basalt: poor in silica, poor in sodium. Found mostly in the ocean floor, large oceanic islands, and places such as the Columbia River Plateau. High Alumina basalt: silica-undersaturated or over-saturated. It's relative richness in aluminum is based on rocks without phenocrysts of plagioclase. Alkali basalt: poor in silica, rich in sodium. May contain alkali feldspar, phlogopite, and/or feldspathoids.
Boninite: high-magnesium form of basalt (or andesite) that is found usually at places where subduction zones/island arcs are forming.
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What are the three types of lava flows associated with basaltic lava?
basaltic lava can form a'a, pahoehoe, or pillow lava.
What type of lava comes from what volcano?
Shield volcanoes will erupt basaltic lava. Cinder cones erupt basaltic lava or basaltic andesite lava. Stratovolcanoes often erupt andesite lava, but may erupt basaltic or rhyolitic lava and all intermediate types as well.
Is lava butte basaltic or granitic lava flow?
A lava butte is generally basaltic lava. Granitic lava flows (called rhyolitic when they form at the surface) are rare and do not cover much ground.
What are gentle slopes of basaltic lava flow?
canthentian volcano
What type of basaltic lava flow has a fairly smooth unfragmented ropy surface?
Pahoehoe lava.
What are three different types of lava?
Basaltic, andesitic and rhyolitic
Does basaltic or rhyolitic lava flow faster?
Basaltic lava flows much faster than ryholitic lava.
What are the three types of lava flows associated with basaltic lava?
basaltic lava can form a'a, pahoehoe, or pillow lava.
What type of lava comes from what volcano?
Shield volcanoes will erupt basaltic lava. Cinder cones erupt basaltic lava or basaltic andesite lava. Stratovolcanoes often erupt andesite lava, but may erupt basaltic or rhyolitic lava and all intermediate types as well.
Is lava butte basaltic or granitic lava flow?
A lava butte is generally basaltic lava. Granitic lava flows (called rhyolitic when they form at the surface) are rare and do not cover much ground.
What are gentle slopes of basaltic lava flow?
canthentian volcano
What type of basaltic lava flow has a fairly smooth unfragmented ropy surface?
Pahoehoe lava.
Does basalt or rhyolite flow faster?
Basaltic lava flows much faster than ryholitic lava.
Which type of lava-basaltic lava or rhyolitic lava flows faster and why?
Basaltic flows much faster than rhyolite. Rhyolite is higher viscosity. Find a video of a basaltic lava flow like Hawaii, it flows like water when it's hot. Rhyolite eruptions usually act more like toothpaste if they're slow, or an explosion if fast.
How did AA lava get its name?
Aa lava is a basaltic lava with a flow characterized by rough surfaces of clinker.
Why are there different types volcanoes?
there are different types of volcanoes for different reasons. how they form has alot to do with the type of lava said volcano produces. fluid basaltic lava tends to create shield volcanoes. spatter cones tend to form when hot erupting lava contains just enough explosive gas to prevent the formation of a lava flow, but not enough to shatter it into small fragments. hot expanding gas tears the lava into hot fluid clots.
Is it basic lava or basaltic lava?
It's basaltic lava, not basic.
