Landscape Flashcards
1
Q
What was the aim of classical geology?
A
To establish the relative ages of rocks exposed at the surface.
2
Q
What methods were used for dating in classical geology?
A
Superposition and fossil records. These however only gave us relative date.
3
Q
What is presently used for geological dating?
A
The radioactive decay of isotopes such as uranium and thorium.
4
Q
What are the 2 zones of the continental crust? and what are they primarily made from?
A
The upper, which is felsic material with a high silica content.
The lower, which is matic material with a high iron and magnesium content.
5
Q
What is rifting?
A
The stretching of continental landmass, this forms rift valleys which oceans move into.
6
Q
What is folding?
A
The compression of landmass, this forms mountains.
