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Lava makes many rocks that are very fertile with minerals that plants need, and the land around volcanoes is rich and fertile and is very good to be used for farming.

Lava rocks (extrusive igneous rocks) make useful road building materials as aggregates, and can be cut and polished for use as a decorative stone inside buildings. Pumice is used as landscaping rock and as an abrasive in cleaning products and some polishing compounds. In less recent history, lava rocks were used as building materials, grinding stones, toolmaking, and weapon construction.

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16y ago

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