4.10. (9/16) Stratigraphy and Steno's Laws Flashcards
Map and spatial relationships of hillslope deposits from the Riegelsville Narrows. Steno’s Laws. Building stratigraphy from eroded and transported material; the concept of an unroofing sequence, working with the Riegelsville Narrows data
1
Q
What are the characteristics of debris flows?
A
- alluvial fans
2
Q
Pebble cliffs characteristics
A
red rocks, 1/2 m beds, quartzite/limestone/granite/gneiss pebbles
3
Q
Phillips road characteristics
A
angular clasts, limestone, granitic gneiss, indistinct bedding
4
Q
What do landslide deposits look like?
A
- mixed up mess
- no stratification
- not much bedding
- close to their origin (where the hillslope failed)
- big boulders stuck at side
5
Q
What are the characteristics of creeps?
A
6
Q
What is the law of superposition?
A
younger layers sit on top of older layers of rock
7
Q
What is the law of original horizontality?
A
beds are deposited in horizontal orientations
8
Q
What causes tilting?
A
something happened after being deposited horizontally
9
Q
What is the law of lateral continuity?
A
Beds go on for large areas (km)
