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felsic
This term is a technical portmanteau derived from feldspar and silica, used almost exclusively within the fields of geology and petrology. It describes a specific chemical composition of igneous rocks, which typically results in a light-colored appearance, such as that of granite or rhyolite.
In a professional geological context, "felsic" is used as a precise descriptor of mineralogy rather than a general description of color. While felsic rocks are usually light, the term specifically refers to the high concentration of silica and aluminum rather than the visual hue itself.
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Ví dụ
The continental crust is predominantly composed of felsic rocks.
The continental crust is predominantly composed of felsic rocks.
Look at this sample; the light color indicates it is a felsic igneous rock.
Felsic magma is generally more viscous than mafic magma.
I wonder if this outcrop is actually felsic or just weathered.
Rhyolite is a common example of a volcanic felsic rock.
The eruption was explosive because the magma was highly felsic.
Is this granite considered a felsic plutonic rock?
The geologist noted a distinct transition from mafic to felsic layers.