Midterm2 Flashcards
Deep time
The immense span of geological time
The immense span of geological time
Deep time
Physical principles:
Uniformitarianism Superposition Horizontality Lateral continuity Cross-cutting relations
Uniformitarianism
That processes observed today were the same in the past
Superposition
Younger layers of rock sit atop older layer
That processes observed today were the same in the past
Uniformitarianism
Younger layers of rock sit atop older layer
Superposition
Horizontality
Layers of sedimentary rock are originally deposited flat but can orient after tilting/folding event
Layers of sedimentary rock are originally deposited flat but can orient after tilting/folding event
Horizontality
Lateral continuity
Layers of rock are continuous until they encounter other solid bodies that block their disposition or until they are acted upon by agents that appeared after deposition took place
Layers of rock are continuous until they encounter other solid bodies that block their disposition or until they are acted upon by agents that appeared after deposition took place
Lateral continuity
Cross-cutting relations
Rock layers (below/above the intrusion) must be older than the intrusion that disturbs them
Rock layers (below/above the intrusion) must be older than the intrusion that disturbs them
Cross-cutting relations
