Table of Contents
- 1 Is it true that all igneous rocks have the same mineral compositions?
- 2 What kinds of igneous rocks have the same mineral composition?
- 3 Do all rocks have the same minerals?
- 4 How can two different igneous rocks have the same mineral composition?
- 5 Is it possible for two igneous rocks to have the same mineral composition but be different rocks use an example to justify your answer?
Is it true that all igneous rocks have the same mineral compositions?
In addition to texture, igneous rocks may are classified according to their chemical composition. However, not all of these minerals will be crystallized together in the same rock. A mafic magma will begin crystallizing olivine and continue with pyroxenes and calcium rich plagioclase feldspar.
What kinds of igneous rocks have the same mineral composition?
Granite and rhyolite have the same mineral composition, but their grain size gives each a distinct appearance. The key difference between intrusive and extrusive igneous rocks—the size of crystals making them up—is related to how rapidly melted rock cools.
Why don t all igneous rocks have the same composition?
Magma Composition The rock beneath the Earth’s surface is sometimes heated to high enough temperatures that it melts to create magma. Different magmas have different composition and contain whatever elements were in the rock that melted.
Do all rocks have the same minerals?
About 200 minerals make up the bulk of most rocks. Quartz, calcite, and clay minerals are also common. Some minerals are more common in igneous rock (formed under extreme heat and pressure), such as olivine, feldspars, pyroxenes, and micas.
How can two different igneous rocks have the same mineral composition?
An igneous rock is classified on the basis of its mineral composition and the size of its mineral crystals. A rock formed from magma can have the same composition as a rock formed from lava. The rocks, though, will have different names, because the sizes of their crystals will be very different.
What rocks have the same composition?
Igneous rocks are categorized in pairs. The two rocks in a pair have the same composition but different textures: gabbro-basalt, diorite-andesite, and granite-rhyolite.
Is it possible for two igneous rocks to have the same mineral composition but be different rocks use an example to justify your answer?
Is it possible for 2 igneous rocks to have the same mineral composition but be different rocks? Use an example to explain your answer. Yes, volcanoes can make volcanic ash and Pumice. Partial Melting is where part of the rock melts in the magma and then changes the magma.