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Which is more powerful--a directional or a nondirectional test?
Granite
Granite is a coarse-grained igneous rock composed mainly of quartz, feldspar, and mica, widely used in construction due to its durability.
Volcanic Neck
A vertical column of volcanic rock, formed by magma solidifying in the vent of an inactive volcano.
Igneous Feature
A geological structure formed from hardened lava or magma, such as a volcano or granite intrusion.
Dike
A sheetlike intrusion that cuts across any layers in a host rock, commonly formed with a steep orientation.
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