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Dolerite also called "Rowley Rag" can be found in Rowley Regis,West Midlands,England.
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Dolerite and gabbro are both igneous rocks Dolerite has crystals about 1 mm across and gabbro has crystals about 5 mm across What does this indicate about the formation of these rocks?
In comparison to the slower cooled magma that created the gabbro, the dolerite has formed closer to the surface. This means that there was less time for crystal growth before it cooled into rock, resulting in the difference in crystal size between the two.
Which is a coarse-grained igneous rock composed of mainly pyroxene plagioclase feldspar and olivine?
Gabbro.
What is the difference between granite and dolerite?
Granite is felsic means having more than 65% SiO2 whereas dolerite is mafic having 45 to 52 SiO2.
Is Eyjafjallajokull on a constructive plate boundry?
Yes. It is believed to have erupted in 2010 twice because of the constructive margin. The plates were pulled apart by convection currents then because of this basalt lava seeps in to form a new crust beneath the sea and existing volcano. Much of the magma was intruded as dolerite dykes (thin sheets of igneous rock.) New lava and dykes then added extra crust at each side of the spreading ridge.
Is eyjafjallajokull on a plate boundry?
Yes. It is believed to have erupted in 2010 twice because of the constructive margin. The plates were pulled apart by convection currents then because of this basalt lava seeps in to form a new crust beneath the sea and existing volcano. Much of the magma was intruded as dolerite dykes (thin sheets of igneous rock.) New lava and dykes then added extra crust at each side of the spreading ridge.
Is Dolerite Rock rough or smooth?
Dolerite is very rough.
What is dolerite made out of?
Igneous Rock :)
What metamorphic rock is formed by dolerite?
hornblende
How was the Dolerite Ball used in Ancient Egypt?
It wuz used for pounding into a rock. the dolerite ball was very. very hard.
Is conglomerate intrusive or extrusive?
Neither. Conglomerate is a sedimentary rock. Intrusive and extrusive are descriptive terms used to classify igneous rocks.
What type of rocks are dolerite rocks?
Dolerite rocks are a type of igneous rocks (formed as a result of cooling of magma or lava). They are mafic (45-52% SiO2), and subvolcanic (formed within the earth's crust). Within this characterisation there is considerable variation. Please see the link.
What tools did carvers use?
Stone carvers would use a special granite rock called ''Dolerite.''
Variety of igneous rock containing a large amount of feldspar usually found in sillsand dykes?
dolerite
What is a dolerite dyke?
Dolerite is coarse grained variety of basalt, if present in the dorm of a dyke (discordent igneous body), it is called a dolerite dyke.
Dolerite and gabbro are both igneous rocks Dolerite has crystals about 1 mm across and gabbro has crystals about 5 mm across What does this indicate about the formation of these rocks?
In comparison to the slower cooled magma that created the gabbro, the dolerite has formed closer to the surface. This means that there was less time for crystal growth before it cooled into rock, resulting in the difference in crystal size between the two.
Which is a coarse-grained igneous rock composed of mainly pyroxene plagioclase feldspar and olivine?
Gabbro.
Is dolerite magnetic?
Yes, it can be.
