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Igneous Rock Vocabulary
Can you pick the term relating to igneous rocks that matches the given definition?
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(adj) describing rocks that have crystals so fine they cannot be seen with the naked eye
(adj) describing rocks that have small holes created by escaping gases
(adj) describing rocks with coarse grains that can be seen with the naked eye
(adj) describing rocks whose texture arose due to two-stage cooling, forming two different crystal sizes
(n) large crystals that are present in porphyritic rocks
(n) the part of the rock surrounding the phenocrysts in porphyritic texture.
(adj) describing a rock that cooled so quickly there was not time for the rock to crystalize
(n) a body of magma that is less dense than its surrounding rock, and pushes its way to the surfce
(n) a large, deep intrusive body of magma
(n) a smaller body of magma that resides shallower in the ground
(v) when a body of magma cools enough to become a solid mass
(adj) describing a rock forming inside the earth, like granite
(adj) describing a rock that forms outside the earth, like basalt
(n) an area of upwelling mantle, possibly from a mantle plume
(adj) describing igneous rock high in olivine and pyroxene that is 100% mafic minerals
(adj) describing igneous rock that has calcium-rich feldspar and pyroxene; 45-80% mafic minerals
(adj) describing igneous rock that has amphibole sodium and is 15-45% mafic minerals
(adj) describing igneous rock that has quartz, plagioclase and alkali/potassium feldpsar and is up to 15% mafic minerals
(n) a shallow, thin body of magma concordant to the ground
(n) a thin, tall body of magma discordant to the ground
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