- Source: Silicic
Silicic is an adjective to describe magma or igneous rock rich in silica. The amount of silica that constitutes a silicic rock is usually defined as at least 63 percent. Granite and rhyolite are the most common silicic rocks.
Silicic is the group of silicate magmas which will eventually crystallise a relatively small proportion of ferromagnesian silicates, such as amphibole, pyroxene, and biotite. The main constituents of a silicic rock will be minerals rich in silica-minerals, like silicic feldspar or even free silica as quartz. These are just part of all the other silicate minerals that make up 90% of the earth's crust.
This broad classification is refined in practice based on more detained compositional studies where ever possible in the science of mineralology.
Example
The "Shammar group" is a silicic and volcaniclastic sequence in northwestern Saudi Arabia.
See also
Felsic
Mafic
References
Kata Kunci Pencarian:
- Silikon dioksida
- Danau Maninjau
- Lempeng Pelso
- Provinsi beku besar
- Daftar letusan gunung berapi terbesar
- Pulau Socorro
- Kamus rumus kimia
- Cerro Chao
- Gunung Kambalny
- Pelapukan terakselerasi
- Silicic
- Silicic acid
- Orthosilicic acid
- Tetramethyl orthosilicate
- Large igneous province
- Calcium silicate
- Paraná and Etendeka traps
- Tetraethyl orthosilicate
- Effusive eruption
- Stratovolcano
