Rocks NYS ESRT Review

Which processes lead directly to the formation of igneous rock?

• weathering and erosion

• compaction and cementation

• heat and pressure

• melting and solidification

Obsidian's glassy texture indicates that it formed

• slowly, deep below Earth's surface

• slowly, on Earth's surface

• quickly, deep below Earth's surface

• quickly, on Earth's surface

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

• andesite

• pegmatite

• pumice

• scoria

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

• granite

• rhyolite

• gabbro

• basalt

Which rock is only formed by regional metamorphism?

• slate

• hornfels

• dunite

• marble

The rock formed by contact metamorphism between magma and sandstone would be...

• marble

• quartzite

• phyllite

• slate

Which rock formed in the contact metamorphism zone between hot magma and limestone?

• marble

• basalt

• quartzite

• hornfels

Which characteristic of the granite intrusion provides the most evidence that it solidified deep underground?

• very hard

• coarse texture

• light color

• felsic composition

Particles of which size could have formed shale?

• 0.2 cm

• 0.02 cm

• 0.002 cm

• 0.0002 cm

Which of the following would be classified as a boulder?

• less than 0.2 cm in diameter

• 0.2 to 6.4 cm in diameter

• 6.4 to 25.6 cm in diameter

• greater than 25.6 cm in diameter