Unformatted text preview: 209 / 250 $ 250 1 20 9 00
83
200 0
84
V
900
750
150
310
10
Mid . 1800's 7 present
26
26
16
20
Uniformitarianism ? " the present is the key to
the
past .
16
20
Charles Lyell -- "Principles of Geology" 1833- 1836
RO
20
18
20
4 Actualism - geological processes that operated in the
past are similar to those in the present ,
Jolie Penal
18
20
16
20
though rates and scale may vary significantly .
hapter 131
+75 + 100
209 250
Steno's Rules - Relative Geological GoDating
ly sequence order of events
ther
Radio isotopic Dating
state of
4 age numbers on rocks
here at
time
1 ) Law of Original Horizontality
peratur
2 ) Law of Super Position
3 ) Law of Lateral Continuity
4) Principle of Cross- Cutting Relations
are
Walther's Law Fig 6. 7!
at
Rule of Inclusions Fig 6.8
Unconformities - A surface between rocks that indicates a
break in time: either from erosion or nondeposition
Three types
based.
7 Sed .
RX
RX.
. dan
? sed
Sed .
SRX
RX.
Disconformity
Angular Conformity
Nonconformity...
View
Full Document
- Fall '10
- JamesWilkerson
