Science
What are angular conformity rocks made out of?
They are made up of a tilted rock underneath with a line seperating it and a different colored, younger, type of rock on top of it.
What does the principle of superposition mean?
Meaning that anything at the bottom is older than anything above.
What is UNIFORMITARIANISM?
It means that the Earth is obviously changing. Things were not the same years ago.
What is the Hadean Eon?
It is an eon that had little oxgyen and a bad atmosphere. Heavy bombardment. No rock record and probably formed by a moon collision
What period and epoch are we in?
Period: Quaternary
Epoch: Holocene
What are sedimentary rocks?
They are tiny pieces of rocks, sand, shells, mud and pebbles that have been squashed together for years.
What are Igneous rocks?
Rocks formed when hot magma cools down
Who is James Hutton?
A Scottish doctor and geologist.
What are another thing index fossils are known for?
For the age of a certain type of fossil helps date the rocks around it.
What is the meaning of the principle of Biologic Succession?
It means rocks can be compared to each other based on fossil species.
What does the earliest time Eon of rocks consist of?
1) Hadean
2) Archaean
3) Proterozoic
Who created the principle of biologic succession?
William Smith
What is magma?
It is extremely hot, molten rock cystals and dissolved gases beneath the Earth's surface.
What are the four geologic time scale?
Eon
Era
Period
Epoch
Name 3 principalities that geologists use to determine age.
1) Principle of Biologic Succession
2) Principle of Cross-Cutting Relationships
3) Principle of Inclusion
What does the principle of Inclusion Principle mean?
Small fragements of one type of rock that is inside a second type must have formed first when the second rock was forming
What are the three types of conformities that we have learnt so far?
1) Angular conformity
2) Disconformity
3)Nonconformity
Name 3 pricipalities that geologists use to determine the age of a rock.
1) Principle of superposition
2) Principle of horizontally
3) Principle of original lateral conitinaity
What are Disconformity rocks made out of?
They are made out of two different types of staright layered rocks
What are nonconformity rocks made out of?
They are made out of Igneous rocks at the bottom and sedimentary rocks on top.
What does the principle of original lateral continuity mean?
It means sedimentary rocks were deposited in large layers until it became thinned out.
What are the characteristics of an index fossil?
2) Short life spam
3) Easily recognised
4) Lot of them throughout their age range
What does the cross cutting relatioships mean?
A rock feature that cuts across another feature must be younger than the rock it cuts.
what does the principle of horizontally mean?
It means all rock layers were originally deposited horizontally.
What is Charles Lyell known for?
For polurizing the UNIFORMITARIANISM.