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Ultramafic rocks are made of ferromagnesian minerals.

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How do ferromagnesian minerals differ from other rock forming minerals?

These minerals are usually dark in color, Ferromagnesian Minerals minerals are also denser than other rock-forming minerals.Resources: Science Impact Integrated Science Third Edition (Academe) pp.73


Basaltic magma forms what kind of igneous rock?

Mafic igneous rock. ( due to Ferromagnesian minerals).


Is a limestone a rock or mineral?

Limestone is a rock, composed mainly of the mineral calcite.


How would you distinguish among granite gabbro and diorite?

Gabbros is formed of course grained ferromagnesian minerals and gray plagioclase feldspar it can be identified on the basis of cleavage and with practice verifies that no quartz is present. Diorite is composed of feldspar and significant amounts of ferromagnesian minerals. The mineral can be identified and their percentages estimated to indicate diorite. Granite is a coarse grained (the grains are larger than 1 millimeter) rock composed of predominantly of feldspar and quartz, is an intrusive rock.


What is ferromagnesian rocks?

ferromagnesian rocks are dark coloured rocks with high melting point and high specific gravity. they are basic rocks that consists of the elements like iron and magnessium, and are made up of mostly the olivine and pyroxene minerals. ferromagnesian rocks are formed from the earths interior espesially within the mantle. they include gabbro, basalt and peridotite.


What type of rock is red sandstone?

Redsandstone (sometimes known as arenite) is a clastic sedimentary rock composed mainly of sand-sized minerals or rock grains.


What is the mantle filled with?

The Earths mantle is filled with ferromagnesian rocks with minerals such as Olivine and Pyroxene.


What type of metamorphic rock is composed mainly of calcite and dolomite?

Marble is a metamorphic rock that is composed mainly of calcite and dolomite. These minerals are typically formed from the metamorphism of limestone or dolostone. Marble is known for its distinctive veining and high polish.


Is basalt a rock or mineral?

Basalt is a type of rock, specifically an extrusive igneous rock that forms from solidified lava flows. It is composed mainly of minerals such as feldspar and pyroxene.


Is marble a mineral?

Marble is not a mineral; it is a metamorphic rock composed primarily of calcite or dolomite crystals. Minerals are naturally occurring inorganic substances with a specific chemical composition and crystalline structure, whereas marble is a rock made up of minerals.


What has a lower density rhyolite or basalt?

Ryholite due to the reason that this rock is made up of lighter elements than that of Basalt


What is sandstone comprised of?

Sandstone is a sedimentary rock composed mainly of sand-size mineral or rock grains. Most sandstone is composed of quartz or feldspar because these are the most common minerals in the Earth's crust.