After effusive lava eruptions decrease, which outcome results from increased dissolved silica content?

💡 Explanation

Rhyolitic lava domes form because higher silica increases viscosity, inhibiting lava flow; therefore, sticky lava piles up near the vent, rather than flowing to create shield volcanoes. Magma fragmentation does not occur.

• Which mechanism causes increased groundwater arsenic concentration in alluvial aquifers after prolonged flooding?
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