Table of Contents
What types of rocks are in the intermediate family?
Intermediate rocks: Rocks composed mostly of hornblende and intermediate plagioclase feldspars make up the intermediate family of igneous rocks. Intermediate magmas are somewhat more viscous than the mafic magmas.
What are the two intermediate rock forms?
Typical intermediate rocks include andesite, dacite and trachyandesite among volcanic rocks and diorite and granodiorite among plutonic rocks.
What are the two families of rock?
Igneous rocks are formed from melted rock deep inside the Earth. Sedimentary rocks are formed from layers of sand, silt, dead plants, and animal skeletons. Metamorphic rocks formed from other rocks that are changed by heat and pressure underground.
What are the two intermediate mafic?
Compilations of many rock analyses show that rhyolite and granite are felsic, with an average silica content of about 72 percent; syenite, diorite, and monzonite are intermediate, with an average silica content of 59 percent; gabbro and basalt are mafic, with an average silica content of 48 percent; and peridotite is …
How many types of rocks are there name them?
There are three kinds of rock: igneous, sedimentary, and metamorphic.
What are some examples of intermediate igneous rocks?
Adakite – A class of intermediate to felsic volcanic rocks containing low amounts of yttrium and ytterbium. Andesite – An intermediate volcanic rock. Alkali feldspar granite – A granitoid in which at least 90% of the total feldspar is alkali feldspar. Anorthosite – A mafic intrusive igneous rock composed predominantly of plagioclase.
What are the different types of rocks?
Though we could come across different colors, types and looks as far as rocks are concerned, scientists and geologists classify rocks basically into three different types. They are igneous rocks, sedimentary rocks and metamorphic rocks. Igneous rocks are the most commonly found rocks as far as the surface of the earth is concerned.
What type of plate boundary produces intermediate rocks?
Intermediate rocks are produced primarily in convergent plate boundaries in which an oceanic plate is subducting beneath either another oceanic plate (such as in Japan) or a continental plate (such as along the Andes Mountains of South America). Intermediate magmas tend to form thicker lava flows and higher,…
What is the difference between andesite and anorthosite and basalt?
1 Andesite is an extrusive igneous rock that is higher in silica than basalt and lower than rhyolite or felsite. 2 Anorthosite is an uncommon intrusive igneous rock consisting almost entirely of plagioclase feldspar. 3 Basalt is an extrusive or intrusive rock that makes up most of the world’s oceanic crust.