Geologic Maps

1
Geologic Maps

• Geologic Principles
• Original horizontality
• Superposition
• Cross Cutting

2
Angular Unconfromity
Angular Unconformity Page 50
3
Relative Dating - Geologic Column Page 52
4
Geologic Structures Fault Page 53
5
Geologic Structures Page 54

• Anticline
• Syncline
• Dome
• Basin

6
Geologic Maps

• Rock types and their distribution
• Show Bird's Eye View
• How Maps are made
• Topo Map base
• Outcrops (rock exposed at the earths surface)
• Draw contacts

7
Geologic Map Parts

• Formation
• A rock unit distinct from rock above and below
• e.g.
• Color and Symbols represent different formations
• Orange Formation in Northern Illinois
• Symbol
• Stratigraphic Column
• Cross Section