The Key to Geologic Dating- How Do We Know The Rock's Initial Isotope Composition? GEO GIRL
13:08
Strontium (Sr) Elemental & Isotopic Behavior and Proxies | GEO GIRL
22:02
Where Did Earth's Water Come From? & How Do We Know? GEO GIRL
25:28
How & When the Appalachian Mountains Formed & The Rocks Found Here! GEO GIRL
26:13
Earth’s Age- How We Know Earth is 4.55 Billion Years Old | GEO GIRL
33:37
Something Strange Happens When You Trust Quantum Mechanics
19:17
Rock Identification with Willsey: Nonfoliated Rocks - Quartzite and Marble
30:10
How Gemstones Form From Igneous & Metamorphic Processes (12 Examples!) GEO GIRL
21:39