Transcript Sedimentary Rocks

Sedimentary Rocks
Cornell Notes pg. 133
How do
Sedimentary
Rocks form?
• Small rocks, sand,
and other sediment
are deposited in thick
layers.
• Over time, sediment
is compacted and
cemented together to
form rock.
Where does
the sediment
come from?
• Other rocks that are
weathered (broken
down)
– Can be from
igneous,
metamorphic, or
even other
sedimentary rocks!
What is
compaction?
• Small rocks and sand
are compressed
(pressed together)
• Minerals dissolved in
What is
water act as a glue to
cementation?
bind sediment together.
What is
strata?
• Most noticeable
feature of
sedimentary rocksrocks layers!
• Fragments of rock and
What is
sand are cemented
Clastic
together with dissolved
Sedimentary
minerals.
Rock?
• Can be coarse or fine
grained.
What is
• Rainwater
Chemical
dissolves minerals
Sedimentary
from rocks
Rock?
• Minerals eventually
crystallize to form
chemical
sedimentary rocks.
– Halite: rock salt
What is
• Forms from
Organic
remains of plants
Sedimentary
and animals.
Rock?
– Coal: ancient
swamps
– Limestone: hard
shells of living
things