Basalt, showing typical diabasic structure of lath-shaped crystals of plagioclase.
Devil's Wall (Teufelsmauer) near Oschitz, Bohemia. A basaltic dike.
"Diabantite, ore material, and agate in vesicle of main basalt. The radial mass occupying the center…
Marmorization of chalk beds by basalt. Island of Rathlin on coast of Antrim, Ireland.
An illustration of section of mine from the Kimberley Mine located in South Africa.
"Egyptian Statue in black basalt. Heroic size, in the British Museum." —D'Anvers, 1895
Section of volcanic plug (basalt) in chalk. Coast of Antrim, Ireland.