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Sagot :
Answer:
Crustal appearance provides the basis for classifying lava flows on land into three major categories, pahoehoe, aa and blocky.
Explanation:
Crustal appearance provides the basis for classifying lava flows on land into three major categories, pahoehoe, aa and blocky.
Is lava a pyroclastic material?
Lava creeps slowly and burns everything in its path but pyroclastic flows destroys nearly everything by land and air, its speed is usually greater than 80 km per hour, but it can reach 400 km per hour.
Pyroclastic flows contain a high-density mix of hot lava blocks, pumice, ash and volcanic gas. They move at very high speed down volcanic slopes, typically following valleys.
Learn more about pyroclastic material here:
https://brainly.com/question/16582896
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