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32 questions
Which igneous rock could physically weather to beach sand that contains the minerals pyroxene, plagioclase feldspar, and olivine?
dunite
perodite
granite
gabbro
The photograph below shows a magnified view of a portion of a rock that can float if placed in water. Which terms best describe this rock?
foliated and banded
coarse and non-vesicular
elastic and fragmental
non- crystalline and vesicular
Which texture best describes an igneous rock that formed deep underground?
glassy
fine
vesicular
coarse
What is the color and type of rock that forms oceanic crust at mid-ocean ridges? (Underwater volcano)
light colored and igneous
light colored and sedimentary
dark colored and sedimentary
dark colored and igneous
Obsidian's glassy texture indicates that it formed
slow, deep below the surface
slow, on the earths surface
quickly, above the earths surface
quickly, deep below the earths surface
The diagram below indicates physical changes that accompany the conversion of shale to gneiss. Which geologic process is occurring to cause this conversion?
metamorphism
intrusion of magma
weathering
sedimentary layering
The photograph below shows a large outcrop of rock composed primarily of visible crystals of mica, quartz, and feldspar. Based on the composition and foliated texture, this rock can best be identified as
marble
schist
slate
coal
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