How do post depositional changes convert sediments to sedimentary rocks ?
1 answer:
Answer:
It's caused by burial forces
Explanation:
When sediments are deposited on a basin they begin to accumulate over each others, generating a burial force that produces its compaction. Then, some calcite and silica cements help to join the sediments grains creating rocks. That's what geologists call lithification.
This process allow the formation of sedimentary rocks, which usually are laminated because of the horizontal position of sediments accumulation.
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<u>Answer: </u>
The ranking of common igneous silicate minerals based on the temperature at which crystallization occurs is called Bowen’s reaction series.
<u> Explanation: </u>
In Bowen’s reaction series the minerals with high crystallization temperature are present at the top layer. This means these minerals are the first to crystallize from the magma and they are mostly unstable. The Bowen's reaction series is represented in the Y shape. The left branch of this Y has minerals containing iron and magnesium. They are called as Ferromagnesium minerals.
The right branch of the Y contains plagioclase feldspars minerals. Temperature gradually decreases down along the Bowen’s reaction series from to
. At certain low temperature, the two branches combine forming minerals similar to felsic rocks such as orthoclase feldspar, quartz and muscovite mica.