The composition of lava is the most important characteristic in determining its

Question

The composition of lava is the most important characteristic in determining its behavior The major compositional groups are Basate lava has low silica contents (-50%) and high eruption temperatures causing them to flow rapidly and have a low viscosity Basalts flow far from volc anic vents and form broad, sheet-like lava flows . tic la as mourdup an stay Rhyo tic lava has high silica cortents -70% and low eruption temperatures gring them h gh v scos tes Ry near the volcanic vent because of their resistance to flow. . Intermediate lavas, such as andesitic lava, have compositions, temperatures, and volatile contents between those of basalt and rhyolite. The mineral composition of these groups determines each lava's prevalence Some minerals melt more readily leading to larger volumes of lava. Basalts and rhyolites are thought to form early and late in the melting process. respectively. More than 90% of the total volume of lava on Earth is estimated to be basa c in composition, while rhyolites make up as little as 1% of the total Andesites and other lavas account for most of the rest. By considering the compositional group and temperature of lava we can evaluate the lava's viscosity and eruptive style Drag the appropriate items into their respective bins. View Available Hint(s) Reset Help 0% of ava on Eartn fast lava flow! 1%ofiava on Earth slow ava flow silica nehlava no sin sneesl intermediate lava now Basaltic composition Andesitic composition Rhyolitic composition

Explanation / Answer

Basaltic :
Flows in sheets
fast lava flow
90% of lava on earth

Andesitic :
intermediate lava flow

Rhyolitic :
Slow lava flow
1% of lava on earth
Silica rich lava

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