14:42

Relative Dating

28:18

How Geologists Determine the Age of Mountains

28:16

Geologic Time & Dating Rocks Without Isotopes (Biostratigraphy & Lithostratigraphy) | GEO GIRL

11:31

When a Billion Years Disappeared

11:04

Siccar Point - crucible of geology

18:19

Primary Sedimentary Structures

32:19

Geology 101 with Willsey, Episode #1: Intro to Earth

45:53

How Snowball Earth Leveled Mountains and Created the Great Unconformity