Unit 2 Lesson 3
Published on Nov 25, 2015
No Description
MORE DECKS TO EXPLORE
PRESENTATION OUTLINE
UNIFORMITARIANISM AND FOSSILS
PRINCIPLE OF UNIFORMITARIANISM
The assumption that the same laws operate in the universe in the past and work everywhere.
FOSSILS
THE PRESERVED REMAINS OF A PLANT OR AN ANIMAL
Organisms can be preserved as fossils by freezing, Amber , tar seeps, casts and molds, and petrification.
Types of trace fossils:
Bones, eggs, teeth and claws, coprolites, burrows, and tracks
Rocks show change through out the year which can show the geologic time
Sedimentary rocks formed under moving water
Fossils match up on the edges of different countries which gives evidence that at one point in time Pangea existed
THE ROCK RECORD
Fossils show how the earth has changed over time. We can determine how old a fossil is and what life was like back then.
Relative dating is the science of determining the relative order of past events, without necessarily determining their absolute age.
the deposition of one geological stratum on another
LAW OF SUPERPOSITION
UNCONFORMITY
a surface of contact between two groups of unconformable
