1. Types of Fossils
Trace Fossils – markings left by animals (footprints, trail, burrow).
Casts – Minerals fill a space left by a decaying organism.
Petrified Fossils – Minerals penetrate, replace hard parts of organism, producing a copy.

2. Types of Fossils
Imprints – Thin object that leaves an imprint when sediment hardens.
Molds – Organism is buried then decays, leaving a gap.
Amber-Preserved / Frozen – An organism is trapped in ice or sap that hardens.

3. Rock Types Describe Environments
Slow-moving floodplain – Lake or Lagoon
Shale rock is present.

4. Rock Types Describe Environments
Shallow, warm marine environments
Lots of Calcium Carbonate (like seashells)
Limestone is formed.

5. Rock Types Describe Environments
Sandstone – Can Describe ALL possible Environments.
Terrestrial:
Rivers (sandbars, mouth)
Glacial outwash
Deserts
Lakes
Marine (Ocean-based):
Beach
Tidal flats
River/ocean deltas

6. Minerals Also Describe Environments
Large amounts of Calcium & Magnesium present create Dolomite Rocks
Typical in salty lagoons.

7. Things Rocks Can Tell Us:
What lived in that environment.
What the environment looked like.
How the environment has changed over time.
What things are more recent/ancient.