0
Rocks that are weathered and eroded can have their particles transported to a place of deposition and become new sedimentary rock. Rocks can become molten, then solidify, becoming new igneous rocks. Rocks can be metamorphosed by: a) exposure to heat by close proximity to a heat source such as a plutonic intrusion; b) from deep burial pressures; c) direct pressure and heat from mountain building processes; d) chemical changes from exposure to heated fluids, the fluids heated by a plutonic intrusion. Metamorphism of rocks can result in a realignment of mineral constituents, recrystallization, or new chemical compositions.
Wiki User
∙ 15y ago
Wiki User
∙ 13y agoRocks are categorized in sedimentary, igneous and metamorphic rocks..
igneous rocks come from the solidification of magma.. sedimentary rocks come from rocks which already exist and they are altered and transported by agents like rain, wind etc.. metamorphic rocks are rocks which had undergone metamorphosis through heat, pressure or friction..
Wiki User
∙ 10y agothe metals are heated in high temperature underground the metals and other substances are mixed, when the mixture is in contact with air (has lower temperature than uderground), it solidifies easily craeting rocks.
Wiki User
∙ 10y agoThey are made from the catagories
Add your answer:
Earn +20 pts
What is formed when rocks melt underground?
sedimentery rock
What type of rock always forms directly from another rock?
Metamorphic. By contrast, igneous rocks form from lava or magma, and sedimentary rock form from sediment. Those things are formed from previous rocks, but constitute intermediate stages: igneous and sedimentary rocks are formed indirectly from previous rocks.
What are pyroclastics?
Pyroclasts are rock fragments or rocks formed from volcanic fragments thrown into the air as a result of a volcanic eruption. Also known as tephra, some examples of these rocks include pumice, reticulite and scoria.
What are igneous extrusions?
== == Extrusive igneous rocks are formed from the solidification of lava on or above the surface. Rapid cooling from exposure to air or water results in rapid crystallization of their component minerals, normally creating a fine grained texture as opposed to intrusive igneous rocks which have a coarser texture. Examples of extrusive igneous rocks would include obsidian, pumice, basalt, and rhyolite.
How was talc formed?
Talc is formed by the hydrothermal alteration of ultrabasic rocks, or low grade thermal metamorphism of siliceous dolomites.
What are some examples of igneous rocks with the meaning?
Igneous rocks are formed from cooling lava. Some examples are obsidian And basalt.
How are metamorfic rocks formed?
formed by immense heat and pressure
Give two examples of organically formed rocks?
Coal and amber.
What are two examples of Metomorphic rocks?
Slate and marble are examples of metamorphic rocks. Other metamorphic rocks include gneiss, schist, and quartzite. All metamorphic rocks are formed from other rock types.
What kind of rocks are formed by percipitaion of a mineral?
The precipitation of minerals forms chemical sedimentary rocks. Examples include calcite deposits in vesicles in igneous rocks like pumice. The definition may be extended to include rocks formed by evaporation. Mineral Gypsum is formed this way.
What are some examples of rock types?
Igneous rocks - rocks formed from molten rock of the mantle Sedimentary rocks - rocks found in streams Metamorphic rocks - rocks changed by the effects of heat and pressure
What are the different rates at which rocks cool?
Rocks cool at different rates due to how they were formed if they were formed intrusively or extrusively Examples of different igneous rocks that form differently is Granite and Gabbro form the same but different from Rhyolite.
How is each of three classes of rocks formed?
Igneous rocks are volcanic rocks. They are formed when lava/magma dries. Examples of igneous rocks are pumice, obsidian, and granite. Sedimentary rocks are rocks formed when layers of sediment are compacted under immense pressure to form a rock. An example is sandstone. Metamorphic rocks are any rock (igneous, sedimentary, or even metamorphic), is subjected to immense heat and pressure. This causes the rock itself to change to a new rock. Examples are marble and shale.
Are sedimentary rock formed by the weathering of other rocks?
Clastic sedimentary rocks are formed by the weathering, erosion, deposition, compaction and cementation of other rocks. Chemical sedimentary rocks however may be precipitated directly from saturated solutions (examples incldue the evaporitic rocks and certain types of carbonates such as oolitic limestones). Some other sedimentary rocks may be biogenic in origin (such as the linmestones that are formed of coral reefs).
Rocks are formed when magma does what?
Rocks are formed when magma cools.
Are metamorphic rocks naturally formed?
Metamorphic rocks are naturally formed. they are formed from natural changes that happen to other rocks.
How is sedimenary rocks formed?
Sedimentary rocks are formed from the earths surface when sediments hardens into rocks :]
