Relative Dating

Relative age –age of a rock compared to other rocks.

Law of Superposition In horizontal layers, oldest layer is on the bottom, youngest layer is on the top

Law of Original Horizontality Sediments are deposited horizontally. Any tilting occurs afterwards

Principle of Cross-cutting Relations 1. intrusions – magma that cuts through rock layers Is younger than the tocks they cut through 2. Extrusions – magma that has sedimentary layers deposited above it. - it is horizontal

Put the layers in order: oldest to youngest

Put in order:

Put in order