Download rocks and rock cycle

 Rocks that are formed
from solidification of
molten rock materials.
8H Igneous rocks
Igneous rocks
Tough rocks with no plates visible.
The crystals (if you can see them) often interlock
and run in different directions.
No fossils present – EVER!
Rocks do not form in flat beds.
Non-porous (will not let water through)
INTRUSIVE IGNEOUS
ROCKS
Rocks that solidify below
the Earth’s surface or
underground, cooling slowly
to produce coarse-grained
rocks.
DIORITE
GABBRO
GRANITE
PEGMATITE
EXTRUSIVE IGNEOUS
ROCKS
 Rocks that solidify above
the Earth’s surface,
cooling quickly to produce
fine-grained rocks.
ANDESITE
BASALT
OBSIDIAN
PUMICE
RHYOLITE
SCORIA
 Rocks that are formed
from accumulation of
sediments.
8H Sedimentary
Sedimentary rocks
Often look like flat plates stuck together.
Grains often visible, these can crumble apart.
Fossils can be present.
Rocks come from flat beds.
Often porous (let water pass through easily).
CLASTIC
SEDIMENTARY
ROCKS
Rocks that are formed from
mechanical weathering
debris.
BRECCIA
CONGLOMERATE
SAND STONE
SHALE
CHEMICAL
SEDIMENTARY
ROCKS
 Rocks that are formed
when dissolved materials
precipitate from solution.
HALITE / ROCK SALT
ORGANIC
SEDIMENTARY
ROCKS
 Rocks that are formed
from accumulation of
plant/animal debris.
COAL
 Rocks that are formed
through modification by
heat and/or pressure
deep in the Earth’s
surface.
8H Metamorphic rock
Metamorphic rocks
Often ‘sugary’ with particles that can be arranged in
sheets or randomly.
Remains of fossils sometimes present – but not often.
Beds often have wavy bands.
Often less porous than sedimentary rocks – but
metamorphic rocks show a wide range of porosity.
FOLIATED
METAMORPHIC
ROCKS
 Rocks that have layered
or banded appearance
due to exposure to heat
and direct pressure.
GNEISS
PHYLLITE
SCHIST
NON-FOLIATED
METAMORPHIC
ROCKS
 Rocks that does not have
layered or banded
appearance.
MARBLE
AMPHIBOLITE
HORNFELS
QUARTZITE
8H The rock cycle