what is rock
TRANSCRIPT
A rock is a naturally occurring, solid aggregate of minerals.
A parent material of mineral soils.
Combinations of two or more minerals.
A natural substance composed of solid crystals of different minerals that have been fused together into a solid lump.
Igneous Rocks
- made of fire ; solidified from molten rock
Sedimentary Rocks
- deposited and buried at Earth’s surface
Metamorphic Rocks
- transformed from pre-existing rocks under high pressure and temperature.
• (derived from the Latin word
ignis meaning fire)
• is one of the three main rock types,
the others being sedimentary and
metamorphic.
• Igneous rock is formed through the cooling
and solidification of magma or lava.
Examples of Igneous rocks
Granite Welded tuffPumice
• rock that are formed by the deposition of
material at the Earth's surface
and within bodies of water.
• Sedimentation is the collective
name for processes that cause
mineral and/or organic particles
(detritus) to settle and accumulate
or minerals to precipitate from a solution.
Examples of Sedimentary Rocks
Conglomerate Breccia Halite
• Rock that was once one form
of rock but has changed to another
by the influence of heat, pressure.
• Examples are marble, which can be
formed from limestone, and slate,
which is formed from shale.
Examples of Metamorphic Rocks
Schist Lapis Lazuli Marble
Rock Cycle
• refers to the diverse set of natural processes that lead to the formation and transformation of igneous, sedimentary, and metamorphic rocks.
• includes erosion and weathering, sediment burial, seafloor spreading, volcanism, tectonism, sediment transportation and cementation.
For example, sedimentary rocks can be formed from fragments of pre-existing igneous, metamorphic, or sedimentary rocks, or any combination thereof, or can be formed by organic or inorganic precipitation of common ions dissolved in salt or fresh water.
Igneous rocks can be formed via melting and extrusion or intrusion of pre-existing sedimentary, metamorphic, and/or igneous rocks.
Metamorphic rocks can be formed by alteration of pre-existing rock types through hydrothermalism, fault slip, or exposure to high temperatures and pressures due to deep burial.