Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
Relative Dating |
Rocks placed in correct sequence/order, doesn't tell age |
|
|
Law of superposition |
In undeformed sequence of SED rocks, each bed is older than the one above it |
|
|
Principle of original horizontality |
Layers if sediment generally deposited in a nearly horizontal position |
|
|
Cross-cutting |
Older dike is always interrupted by the younger dike |
|
|
Inclusions |
A fragment of rock incorporated into another must be older than the rock it's included with |
|
|
Conformable layers |
Rock layers deposited with essentially no interruption |
|
|
Unconformities |
Break in rock record, represents period where deposition stopped, erosion removed formed rocks quickly, then deposition resumed |
|
|
Non-conformity |
Break separates older META or intrusive IG rocks from younger SED strata |
|
|
Angular unconformities |
Tilted or folded SED that are overlain by younger, more flat-lying strata. Indicate pause in D, and period of deformation (tilt/fold) & erosion took place |
|
|
Disconformity |
Strata on each side is essentially parallel to each other |
