where i live there are rainbows
Where I live there are rainbows words? Hawaiian Lullaby...
Geologists like igneous textures because they reveal so much about how a rock formed. The first set of textures focuses on the size of mineral crystals. Crystal size primarily reflects the rate of cooling, but is also often strongly affected by rock composition (especially water or gas content).
Extrusive, or volcanic, igneous rocks look dull and do not sparkle much because they are fine grained. … These crystals make a coarse-grained igneous rock called plutonic, or intrusive, igneous rock because the magma was intruded into cracks deep under the earth’s surface.
The changes in mineral assemblages are due to changes in the temperature and pressure conditions of metamorphism. Thus, the mineral assemblages that are observed must be an indication of the temperature and pressure environment that the rock was subjected to.
Phaneritic – This texture describes a rock with large, easily visible, interlocking crystals of several minerals. … A phaneritic texture is developed by the slow cooling and crystallisation of magma trapped within the Earth’s crust and is characteristic of plutonic rocks.
The texture has to do with the sizes and shapes of mineral grains and other constituents in a rock, and how these sizes and shapes relate to each other. Such factors are controlled by the process which formed the rock.
Phaneritic (phaner = visible) textures are typical of intrusive igneous rocks, these rocks crystallized slowly below Earth’s surface. As magma cools slowly the minerals have time to grow and form large crystals.
what are the six major igneous rock textures?
what does a porphyritic texture indicate about an igneous rock
what is the name of the preexisting rock through which intrusive igneous bodies intrude?
an igneous rock with a ______ texture solidified deep within earth.
how are igneous rocks classified?
igneous rocks with glassy texture
how are igneous rocks classified based on their origin?
composition of igneous rock