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Are basalt crystals large in size?
Basalt crystals are typically small to microscopic in size due to the rapid cooling of lava, which results in limited time for crystal growth. This rapid cooling process usually prevents the development of large crystals in basalts.
What is grain size of basalt?
The grain size of basalt varies depending on how quickly the lava cooled and solidified. Typically, basalt has a fine to medium grain size, with individual grains being less than 1 mm in size. Rapid cooling can result in a fine-grained basalt, while slower cooling may produce a coarser-grained texture.
State one observable characteristic other than crystal size that makes granite different from basalt?
Granite is typically light in color due to its high silica content and contains visible grains of minerals like quartz, feldspar, and mica. In contrast, basalt is typically dark in color, fine-grained, and contains minerals like pyroxene and olivine.
Why are crystals in basalt that formed under water smaller than those in basalt that formed on ground?
Crystals in basalt that formed underwater are smaller because they cool faster in the water, resulting in less time for the crystals to grow. On the other hand, crystals in basalt that formed on the ground have more time to grow as they cool more slowly, leading to larger crystal sizes.
Shape of basalt?
Basalt is typically found in the form of columns, hexagonal prisms, or blocky shapes. These formations are a result of the rapid cooling of lava flows or volcanic eruptions. Basalt can also occur as amorphous masses or vesicular textures, depending on the cooling rate and composition of the lava.
Are basalt crystals large in size?
Basalt crystals are typically small to microscopic in size due to the rapid cooling of lava, which results in limited time for crystal growth. This rapid cooling process usually prevents the development of large crystals in basalts.
What is the shape of the basalt?
Basalt is a rock, not a mineral, and therefore does not have a crystal structure of it's own.
What is the crystal size when magma cools entirely underground?
Cooled slowly underground the pseudo crystals of columnar basalt, such as the Giants Causeway in Ireland may be in a metre size range.
What is the compactness of basalt?
very compact,crystal grains interlocked
What makes basalt not a minerals?
Basalt consists of multiple minerals. Pyroxene, calcium-rich plagioclase, and sometimes olivine are key minerals in basalt. Basalt that cools rapidly may form glass, which contains no minerals because it lacks a crystal structure.
What type of texture do extrusive rock such as basalt have?
Small grained texture from small crystal size.
What is the size of basalt crystals?
relativity small
Why are the Crystal's in pillow basalt smaller than those of in other example of basalt?
Pillow basalts are lavas that were erupted and cooled in sea water. Therefore, they have had very little time to form crystals of any size, during rapid solidification, when compared to most land or air-born eruptions.
What is grain size of basalt?
The grain size of basalt varies depending on how quickly the lava cooled and solidified. Typically, basalt has a fine to medium grain size, with individual grains being less than 1 mm in size. Rapid cooling can result in a fine-grained basalt, while slower cooling may produce a coarser-grained texture.
State one observable characteristic other than crystal size that makes granite different from basalt?
Granite is typically light in color due to its high silica content and contains visible grains of minerals like quartz, feldspar, and mica. In contrast, basalt is typically dark in color, fine-grained, and contains minerals like pyroxene and olivine.
Why are the crystals in pillow basalt smaller than the crystals in basalt that forms in the ground?
Pillow basalt is formed from solidifying lava which erupts under the surface of a body of water. Because of this, it cools much faster, allowing less time for crystal growth.
How willl the sizen of crystals in granite b different from the size of the crystals in basalt?
The will be large in an extrusive granite and fine in an intrusive basalt.
