Scoria Specimen, Scoria forms when spatter from bubbly mafic lava cools quickly., Pack of 12

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For use in lessons on eruption style and cooling rateCorrelates well to Next Generation Science Standards Evidence StatementsErupted from spatter cone as large air bubbles made their way through magma to surfaceCrystallization happens so quickly that large air pockets are trapped within rock, often giving samples jagged, sharp appearance