What two things get thrown out of a cinder cone volcano

Lots of different things come out of a volcano when it erupts depending on what kind of eruption it is. If it is a shield volcano like we have here in Hawai'i, then there is usually a fountain of molten lava that reaches anywhere from 10 to 500 meters into the air. This fountain builds a spatter cone or cinder cone around the vent. Meanwhile, if enough lava is falling from the fountain, a lava flow can develop. If the amount of lava feeding the flow is high, then the flow will move rapidly downhill away from the vent. Rapid-moving flows continually disrupt their surfaces and are constantly exposing more red-hot lava to the atmosphere. This means that the flow is losing a lot of heat and consequently its viscosity increases. As the lava continues to flow rapidly, but now with a high viscosity it starts to get torn into jagged pieces rather than flow nicely. This is how an 'a'a flow develops.

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