Date: 2012-02-13 04:25:15

Concretion

Mineralogy

Minerals

Basalt

Dumbarton Castle

Joint

Sedimentary rock

Rock City

Kansas

Geology

Petrology

Volcanic rocks

Agglomerate Dumbarton Rock - Where is it? This grey flattish mass of rock is a tuff formed from volcanic ash, indicating the proximity to the

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