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extrusive in a sentence

Example sentences for extrusive

Extrusive rocks are more difficult to clearly identify because the mineral grains are typically invisible.
Igneous rocks are divided into two groups, intrusive or extrusive, depending upon where the molten rock solidifies.
These rocks are characterized as either extrusive or intrusive.
Extrusive rocks are made of small, often microscopic crystals, which indicate rapid cooling and little time for crystal growth.
Once you know you have an igneous rock, look at the texture to decide if it is intrusive or extrusive.
The rock capping the mesa is an extrusive form of granite called rhyolite.
Deposits related to subaerial mafic extrusive rocks.
The dam is located in a narrow steep-sided valley cut through several hundred of igneous extrusive and extrusive rock.
Show me all extrusive igneous rock units that contain sanidine.
Display all extrusive igneous rock units that contain sanidine.
However, they are all members of the rhyolitic group, the extrusive equivalent of the intrusively formed granitic group.
Magma that reaches the surface, as in a volcanic eruption, is referred to as extrusive.
Numerous intrusive bodies or extrusive vents were also studied.
Explain the difference between intrusive and extrusive igneous rocks.
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