Terrestrial rocks are formed by three main mechanisms: * Sedimentary rocks are formed through the gradual accumulation of sediments: for example, sand on a beach or mud on a river bed. As the sediments are buried they get compacted as more and more material is deposited on top. Eventually the sediments will become so dense that they would essentially form a rock. This process is known as lithification. * Igneous rocks have crystallised from a melt or magma. The melt is made up of various components of pre-existing rocks which have been subjected to melting either at subduction zones or within the Earth's mantle. The melt is hot and so passes upward through cooler country rock. As it moves, it cools and various rock types will form through a process known as fractional crystallisation. Ig
Attributes | Values |
---|---|
rdfs:label |
|
rdfs:comment |
|
foaf:depiction | |
dcterms:subject | |
Wikipage page ID |
|
Wikipage revision ID |
|
Link from a Wikipage to another Wikipage |
|
Link from a Wikipage to an external page | |
sameAs | |
dbp:wikiPageUsesTemplate | |
thumbnail | |
has abstract |
|
prov:wasDerivedFrom | |
page length (characters) of wiki page |
|
foaf:isPrimaryTopicOf | |
is rdfs:seeAlso of | |
is Link from a Wikipage to another Wikipage of |