Slide 1 - Relative Age

Slide 2 - Relative Age

• Places events in a sequence but does not identify their actual date of occurrence.

Slide 3 - Absolute Time

• Identifies the actual date of an event.

Slide 4 - Video

Slide 5 - Law of Superposition

• In a sequence of undisturbed sedimentary rocks, the oldest rocks will be at the bottom of the sequence and the youngest will be at the top.

Slide 7 - Law of cross-cutting Relationships

• An igneous rock is younger than the rocks it has intruded upon.

Slide 8 - Younger

Slide 10 - Law of included fragments

• Pieces of one rock found in another rock must be older than the rock in which they are found

Slide 11 - Older

• Rock is
• Youngest

Slide 12 - Unconformity

• A place in the rock record where the layers of rock are missing
• Due to erosion

Slide 13 - Unconformity

Slide 14

• Cenozoic
• Mesozoic
• Paleozoic
• Quaternary
• Cretaceous
• Paleogene
• Neogene
• Permian
• Triassic
• Jurassic
• Ordovician
• Cambrian
• Devonian
• Silurian
• Pennsylvanian
• Mississippian
• Unconformities

Slide 15 - The End