Magmas are classified based on their silica composition, which determines the type of rocks formed and the eruption style of volcanoes. There are three main types of magma: basaltic (mafic), andesitic (intermediate), and rhyolitic (felsic). The classification is based on the amount of silica present in the melt.
Magmas are classified based on their silica composition, which determines the type of rocks formed and the eruption style of volcanoes.
There are three main types of magma: basaltic (mafic), andesitic (intermediate), and rhyolitic (felsic).
The classification is based on the amount of silica present in the melt, which ranges from 40-54% for basaltic magma, 54-70% for andesitic magma, and 70-85% for rhyolitic magma.
In order to determine the magma type at each stage, you need to know the percentage of silica at each stage. You can then classify the magma based on the amount of silica present.
For example, if the initial magma contains 45% silicon, it would be classified as basaltic magma. Similarly, you can classify the magma at each stage based on the percentage of silica present.
The probable question may be:
Magmas are broadly classified by their silica (silicon) composition according to the following scheme. Ultimately it relates to the type of rocks that form and the eruption style of volcanoes. (3)
Amount of Si (%) in the melt 40-54%, 54-70%,70-85%
Magma 'type' BASALTIC (mafic), ANDESITIC (intermediate), RHYOLITIC (felsic)
12. Using the above classification scheme, classify the magma type at the following steps using data from your tables: (To do this you will need to know the % of amount of silica at each stage)
• The initial magma contains___% silicon so the magma is a ballon
•The 1st stage magma contains___% silicon so the magma is a ballon
The 2nd stage magma contains___% silicon so the magma is a ballon
The 3rd stage magma contains___% silicon so the magma is a ballon
The 4th stage magma contains___% silicon so the magma is a ballon
The 5th stage magma contains___% silicon so the magma is a ballon