Rock Type
Granite
Sandstone
Shale
Classification
Igneous Rock
Sedimentary
Rock
Sedimentary
Rock
Description
Granite is a
light-colored
with grains large
enough to be
visible with the
unaided eye.
Granite is
composed
mainly of quartz
and feldspar.
This mineral
composition
usually gives
granite a red,
pink, grey or
white color with
dark mineral
grains visible
throughout the
rock.
Sandstone is a
mostly made up
of tiny grains of
quartz.
Sandstone
comes in many
different
colours.
Generally
sandstone rocks
are very firm,
dense, compact,
fine grained and
light in colour.
Shale is
generally less
dense, fissile
(able to be
easily
separated) and
laminated
(layered). The
colour varies,
but is mostly
darker, unless in
outback
Example
Evidence
Jerrico found what looked
like a granite rock, along
the path. We also noticed
that along the path wall
there were polished
granite rocks.
We were able to locate
sandstone in the form of
smaller pebbles on the
shoreline and brick in the
shaded hut walls.
We located smaller shale
rocks along the edge of
the shoreline.
Scoria
Slate (pebbles)
Conglomerate
Igneous Rock
Metamorphic
Rock
Sedimentary
Rocks
climates.
Scoria is a
dense, dark
colored volcanic
rock that may or
may not contain
crystals. It is
typically dark in
color (generally
dark brown,
black or purplish
red), and has
similar
components to
Basalt.
Slate is a finegrained, smooth
to touch,
layered, rock
that is created
by the alteration
of shale or
mudstone. Most
slates are grey in
color. Slate also
occurs in shades
of green, red,
black, purple
and brown.
Conglomerate is
formed from
rounded gravel
and boulder
sized rocks
cemented
together.
Because of this,
generally the
rocks are
denser, and
have a rough
surface. Most of
the time there
are many
different colours
in these rocks.
Scoria was found outside
C3, in the surrounding wall
foundations and on the
edge of shoreline.
We believe that we found
what looked like a slate
pebble on the walk to the
beach. Unfortunately no
photo was taken of the
rock.
We found conglomerate
along the beach. We are
unsure if this rock came
from a building, or was
just rocks cemented
together.
Basalt
Igneous Rock
Basalt is a darkcolored, finegrained, smooth
to touch, light
rock that is
composed of
many minerals.
It most
commonly
forms as an
extrusive rock,
but can also
form in small
intrusive rocks.
We found basalt mixed in
with granite rocks and
sandstone boulders on the
cliff face.