Transcript Our Solar System

Warm-up
Week 16
1. The dating process that places geologic
events in proper sequence is referred to as a
____.
a. radiometric dating
b. temporary dating
c. relative dating
d. numerical dating
2. The idea of __________ states that the forces
and processes that operate today have also
operated in the geologic past.
a. correlation
c. uniformitarianism
b. cross-cutting relationships d. superposition
3. In what type of rocks are most fossils found?
a. metamorphic rocks
b. igneous rocks
c. sedimentary rocks
d. granite and marble
Correlation
• Matching rocks of same age.
Q:
Do you think the same
methods can be used to create
a history of living things?
Fossils!
• Remains of dead organisms.
• Clues.
–Past environment
–Time indicators (When?!)
–Correlation of rocks
• Sedimentary Rocks!
Becoming a Fossil…
1. Fast Burial.
2. Hard Parts.
– Shells, bones, etc.
Interpretation of Fossils.
• Principle of Fossil Succession
– Same order or creation
• Index Fossils
– Widespread
– Short period of time
Fossil Record + Rock Record =
“Geologic Timeline.”
Types of Fossils
Unaltered Remains
Types of Fossils
Altered Remains.
Impressions.
Types of Fossils
Carbonization.
Preservation.
Types of Fossils
Molds.
Trace Fossils.