Show:
Uniformitarianism & Catastrophism
Fossils
Types of Dating
Unconformity
Time
100
Today what do we believe: Uniformitarianism or Casastrophism?
Both
100
A ______ is a cavity in the ground or rock where a plant or animal was buried.
Mold
100
"___________" is a phrase you can use to remember the principle of superposition.
Younger over older
100
What to things cause an unconformity?
Non-deposition or Erosion
100
Which epoch do we live in?
Holocene
200
Who is James Hutton?
He discovered uniformitarianism.
200
DOUBLE JEOPARDY!!! What is a trace fossil?
Any naturally preserved evidence of an animal's activity.
200
___________ is a principle that states that younger rocks lie above older rocks in an undisturbed sequence.
Superposition
200
What is the geologic time scale?
A scale that divides earth's history into distinct intervals of time.
200
At the end of which Era did 90% of life become extinct.
The Paleozoic Era
300
Who wrote the Theory of the Earth, a book that said earth's land forms are constantly changing?
James Hutton
300
Petrified wood is an example of which type of fossil?
Mineral replacement
300
Determining whether an object or event is older or younger than other objects or events is called __________.
Relative Dating
300
A _____________ exists when sedimentary rock layers lie on top of metamorphic or igneous rock.
nonconformity
300
Name 3 of the 4 Eons.
~Phanerozoic ~Proterozoic ~Archean ~Hadean
400
What is Catastrophism?
The principle that states all geologic change occurs suddenly.
400
What organisms are typically preserved as fossils in amber?
Insects
400
________ is a process of establishing the age of a fossil or rock layer by determining the number of years it has existed.
Absolute Dating
400
A _____________ is the most common type of unconformity.
Disconformity
400
Starting with Eons and ending with millions of years ago, list out the divisions of the Geologic Time scale.
~Eon ~Era ~Period ~Epoch ~Millions of years Ago
500
Who is Lyell and what did he do?
A scientist who wrote the Principles of Geography. He reintroduced uniformitarianism.
500
________ are fossils used to determine the age of surrounding rocks without using radiometric dating.
Index fossils
500
Determining whether an object or event is older or younger than other objects or events is called _______.
Relative dating
500
Define: Unconformity
A surface that represents a missing part of the Geologic column.
500
Name the three Era's
Cenozoic, Mesozoic, and Paleozoic