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Rocks

Photo: John Rusk, Yosemite (Some rights reserved)

Rock = the solid mineral material forming part of the surface of the earth and other similar planets, exposed on the surface or underlying the soil or oceans

Headlines
Vintage UK illustrations of rocks and minerals repurposed as a cool poster – Boing Boing

Elsewhere on the Web
British and Exotic Mineralogy

Wikipedia
Rock (geology)
Pumice
Sedimentary_rock
Soapstone
Limestone
Travertine

Planeta

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