Building a Timeline
These could represent a few hundred years, a million years, or even a billion years.
Unconformities
The scientist that rejected the idea of Earth only being a few thousand years old.
James Hutton
Oldest rocks are on the bottom
Superposition
Developed model of Earth's history from its origin 4.6 billion years ago to the present.
Geologic Time Scale
The layers of sediment were formed like this:
D
G
J
Which one is the oldest?
J
If rock formations are very far apart or even on a different continent, geologist rely on...
Fossils
This caused streams to wear down mountains or carve deep canyons.
One feature cuts across another feature
Cross-Cutting Relationships
Geological process that occurs today are similar to those that have occurred in the past.
Uniformitarianism.
When is our test date?
Monday, March 25th
Geologists fill gaps in the rock record through
Because of uniformitarianism, scientists can learn about Earth's ________________ by studying the present.
Past
A rock containing pieces of another rock
Inclusions
Studying the order in which geologic events occurred.
Relative-age Dating.
What day are the baby chicks coming?
April 16th
Top and Bottom
James Hutton observed this to see the gradual change over the years.
Landscape
Rock-forming materials deposited in horizontal layers
Original Horizontality
A rock or sediment layer used as a marker
Key Bed
What is the first part of the scientific method?
Observe, ask questions, or gather information
Time units on the geologic time scale how many years long?
Thousands and millions
Hutton's ideas he came up with created the principle of
Sediments are deposited large and lateral directions
Lateral Continuity
A fossil representation of a species that existed on Earth for a short time, was abundant and inhabited many locations.
Index Fossils
What Month and day is Easter on?
March 31st