Transcript Lab 2: Minerals and Mineral Identification

Fossils
Sedimentary Rocks
Shale
Conglomerate
Sandstone
Fossils
The remains or imprints of living things of the past
found in Sedimentary rocks.
Fossils provide information about life and
conditions in the past.
Fossils of Sea Creatures
Fossils of Plants
• Plant fossils can
tell us about the
ancient
environment
Animal Fossils
• Animal fossils can
tell us
– About past
environments
– What the animal ate
– How they lived
Types of Fossils
• Petrified – Minerals have filled in where an
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organisms once was
Molds – A hollow area that an organism has left.
Cast – A copy of the shape of the organism
(opposite of a mold)
Carbon Film – a thin coating of carbon that is
left behind when gases have been release by the
decaying fossil (like a leaf print on a rock)
Trace – An imprint that an organism left behind
(like a footprint)
How old is it?
• Relative Age – It’s age when compared to
others ( I am older than you)
• Absolute age – It’s actual or real age
– We use radioactive dating to find this
• Unconformity – a gap in the the geological
record (like from erosion)