The differences are that Pahoehoe produces fast moving lava; Aa produces slower moving lava. The kind of eruption that produces these types of lava is a quiet eruption.
Lava flows of pahoehoe and aa indicate that the eruption was effusive ("quiet") rather than explosive, or only very mildly explosive.
No. A lava flow usually indicates an eruption that is not explosive.
A quiet eruption typically produces basaltic lava. This type of lava is low in viscosity and flows easily, resulting in gentle, slow-moving lava flows. It often forms shield volcanoes with broad and gently sloping sides.
They indicate that an eruption is effusive rather than explosive.
They indicate that an eruption is effusive rather than explosive.
Pahoehoe and AA lava are produced by quiet eruptions. This means that instead of a blast or explosion, the lava just flows out of the volcano. Pahoehoe lava is hot and flows quickly. AA lava is cooler in temperature and doesn't flow as quickly.
Pahoehoe is hot, fast-moving lava that has a low viscosity. AA lava has a cooler temperature and moves more slowly. Quiet eruptions are the type that produce these two types of lava.
It was a quiet eruption and it was low in silica
Lava flows of pahoehoe and aa indicate that the eruption was effusive ("quiet") rather than explosive, or only very mildly explosive.
Lava flows of pahoehoe and aa indicate that the eruption was effusive ("quiet") rather than explosive, or only very mildly explosive.
Quiet eruptions