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Este verbete ainda não foi traduzido para o seu idioma, portanto o original é exibido abaixo.
gneiss
This term is used exclusively within geological and petrological contexts to describe a specific type of metamorphic rock. It is characterized by gneissic banding, where minerals separate into light and dark layers due to extreme pressure and temperature. This distinguishes it from schist, which typically exhibits a more platy or flaky appearance.
In technical usage, the word is treated as a mass noun when referring to the material in general, though it can be used countably when referring to specific types or samples of the rock.
Meanings
Examples
The cliff face is composed primarily of banded gneiss.
Look at these distinct layers of light and dark minerals in the gneiss sample.
Gneiss often forms from the metamorphism of granite.
Gneiss often forms from the metamorphism of granite.
I wonder if this outcrop is actually gneiss or just a coarse sandstone.
The region is known for its ancient Precambrian gneiss foundations.
The geologist pointed to the foliation characteristic of gneiss.
High pressure and temperature transformed the original rock into gneiss.
The rugged landscape is dominated by grey and pink gneiss.