Igneous Rocks

Front

Olivine and pyroxene are commonly found in igneous rocks that are

Back

mafic, with high density

Front

Granite bedrock formed when

Back

magma cooled underground

Front

This igneous rock is mostly composed of potassium feldspar and quartz crystals that have an average grain size of 3 millimeters. The igneous rock is most likely

Back

granite

Front

Which igneous rock has a vesicular texture and contains the minerals potassium feldspar and quartz?

Back

pumice

Front

Which intrusive igneous rock could be composed of approximately 60% pyroxene, 25% plagioclase feldspar, 10% olivine, and 5% amphibole?

Back

gabbro

Front

Which process could lead directly to the formation of pumice rock? Options: precipitation of minerals from evaporating seawater, metamorphism of unmelted rock material, deposition of quartz sand, explosive eruption of lava from a volcano

Back

explosive eruption of lava from a volcano

Front

Which three minerals are most commonly found in the igneous rock granite? Options: plagioclase feldspar, pyroxene, and olivine; plagioclase feldspar, potassium feldspar, and quartz; amphibole, biotite mica, and gypsum; amphibole, calcite, and hematite

Back

plagioclase feldspar, potassium feldspar, and quartz

Front

Which common rock is formed from the solidification of molten material?

Back

rhyolite

Front

An extrusive igneous rock with a mineral composition of 35% quartz, 35% potassium feldspar, 15% plagioclase feldspar, 10% biotite, and 5% amphibole is called

Back

rhyolite

Front

Which process is necessary for the formation of igneous rocks? Options: erosion, deposition, solidification, metamorphism

Back

solidification