Rock Identification with Willsey: Intro to rock types and useful

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Chipping away at time: A Q&A with geologist Shawn Willsey

Rock Identification with Willsey: Foliated Metamorphic Rocks - Slate, Phyllite, Schist, and Gneiss

Rock Identification with Willsey: Intrusive Igneous Rocks (granite, granodiorite, diorite, gabbro)

What's My Rock? #6 — a rock identification show

Rock Identification with Willsey: BASALT and its many varieties

Rock Identification with Willsey: Intro to Sedimentary Rocks!

Minerals with Willsey: Feldspars

Minerals: An Introduction for Historical Geology

Geology: Andesite vs Diorite

All about Rocks and Minerals, Learn about Rocks and Minerals

Photographs showing effect of methanol extracts of Croton bonplandianum

Minerals with Willsey: Quartz

Earth Materials: Igneous Rocks

Rock and Minerals