What exactly is magma?
Magma is extremely hot liquid and semi-liquid rock located under Earth’s surface. This magma can push through holes or cracks in the crust, causing a volcanic eruption. When magma flows or erupts onto Earth’s surface, it is called lava. Like solid rock, magma is a mixture of minerals.
What is another name for Magma?
What is another word for magma?
| colloid | lava |
|---|---|
| mixture | paste |
| pumice | suspension |
| tuff | igneous rock |
| molten rock |
What are the top two compositions of magma?
Magma Composition
- Mafic magmas are low in silica and contain more dark, magnesium- and iron-rich mafic minerals, such as olivine and pyroxene.
- Felsic magmas are higher in silica and contain lighter colored minerals such as quartz and orthoclase feldspar. The higher the amount of silica in the magma, the higher is its viscosity.
How magma rises up at deeper levels?
This slow but constant churning convection brings materials from deep within the Earth to the surface, and higher, through volcanic eruptions. Magma rises with convective currents, then cools and spreads out to form ocean-floor crust.
What type of magma has the highest silica content?
MAGMA COMPOSITION AND ROCK TYPES
| SiO2 CONTENT | MAGMA TYPE | VOLCANIC ROCK |
|---|---|---|
| ~50% | Mafic | Basalt |
| ~60% | Intermediate | Andesite |
| ~65% | Felsic (low Si) | Dacite |
| ~70% | Felsic (high Si) | Rhyolite |
What type of volcano is the least explosive?
basalt plateau
What is the biggest cause of death on Mt Everest?
The main reasons for people dying while climbing Mount Everest are injuries and exhaustion. However, there is also a large proportion of climbers who die from altitude related illness, specifically from high altitude cerebral oedema (HACE) and high altitude pulmonary oedema (HAPE).