foliation
The parallel alignment of platy grains is called "foliation." This texture occurs in metamorphic rocks where mineral grains, such as micas, are oriented in a parallel fashion due to directional pressure during metamorphism. Foliation can result in a layered or banded appearance in the rock, reflecting the alignment of these platy minerals.
The parallel alignment of platy grains in a rock is called foliation. Foliation is commonly seen in metamorphic rocks where minerals align in a preferred orientation due to pressure and temperature changes during deformation.
The parallel alignment of platy grains is referred to as "foliation." This geological feature typically occurs in metamorphic rocks, where pressure and temperature conditions cause the minerals to realign, resulting in a layered or banded appearance. Foliation is a key characteristic used to identify and classify metamorphic rocks.
The parallel alignment of platy grains is known as foliation and is commonly found in metamorphic rocks. This texture is a result of directional pressure during the rock's formation, causing minerals to align perpendicular to the direction of stress. Foliation provides valuable information about the rock's history and deformation processes.
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When platy materials have a parallel alignment, the rock is considered foliated. Foliated rocks have a layered or banded appearance due to the parallel alignment of minerals like mica or chlorite. This alignment typically occurs through pressure and temperature changes during rock formation.
Mica.
Schist is a metamorphic rock that exhibits parallel alignment of mineral grains, giving it a foliated appearance. This alignment is typically a result of regional metamorphism where intense pressure and temperature conditions cause the minerals to recrystallize in a preferred orientation.
Mica.