is a fundamental concept in
that describes the dynamic
Rocks are formed from cooled magma the
slower they cool the larger the crystals are.
They can be cooled underground and are
called intrusive; if they are cooled above
ground they are extrusive.
A rock resulting from the
change of preexisting rock as
a result of the effect of heat ,
pressure, chemical action or
combination of these.
A rock formed from precipitation from a solution , by
accumulation of organic materials or by sedimentation and
cementation of sediments derived from preexisting rocks and
transported to a site of deposition by water , wind or ice.
Types of Sedimentary rocks
: fragmented rock
sedimentary rock that has interlocking crystals.
s: very compact texture finely divided non crystalline
: spheroid particles less than 2 millimeters called ooliths.
: This texture Is produced by aggregation of fragments
of organic remains , the most common of which are shell
When liquid or hot magma/lava is reduced in
temperature until it becomes solid.
Heating: When a rock is heated and the
temperature increases until it changes shape
or becomes liquid magma.
) is the
applied in a direction
to the surface of an object.
is the pressure relative to the
local atmospheric or ambient pressure.
The combination of processes that convert a
sediment into sedimentary rock
Intrusive : magma that slowly cools
underground forming crystals.
Extrusive: lava that cools rather quickly above