Basalt
Basalt (Mafic volcanic rock)
igneous
Category
Basalt
Browse basalt specimens identified by the Rock Identifier community.
Learn about Basalt in the encyclopedia
View all →
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Dark basalt cobble
Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase feldspar, pyroxene, and commonly olivine
igneous
Basalt
Extrusive Igneous Rock (Mafic)
igneous
Olivine Basalt (with Epidote and Serpentine)
Mafic Volcanic Rock (Basalt)
igneous
Basalt Pebble
Extrusive mafic igneous rock
igneous
Dark basalt or fine-grained mafic rock
Basalt; primarily plagioclase feldspar, pyroxene, and commonly olivine or iron-titanium oxides
igneous
Weathered volcanic rock, likely basalt
Basalt; commonly composed of plagioclase, pyroxene, and iron-rich oxides
igneous
Basalt
Extrusive mafic igneous rock
igneous
Basalt
Basalt (Mafic igneous rock)
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Small dark rock fragment
Uncertain; possibly weathered basalt or slag
mineral
Basalt
Extrusive mafic igneous rock
igneous
Basalt
Basalt (composition of plagioclase feldspar and pyroxene)
Igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt
Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)
Igneous
Basalt
Basalt (extrusive igneous rock)
Igneous
Basalt with Calcite Veins
Aphanitic mafic volcanic rock with CaCO3 inclusions
igneous
Dark igneous rock, likely basalt
Basalt; chiefly plagioclase feldspar, pyroxene, and possibly olivine
igneous
Basalt River Stone
Basaltic Igneous Rock
igneous
Vesicular basalt (weathered lava rock)
Basalt, predominantly plagioclase, pyroxene, and minor olivine/iron oxides
igneous
Gabbro
Gabbro (Coarse-grained Mafic Igneous Rock)
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Gabbro
Gabbro
igneous
Vesicular Basalt
Basalt (extrusive volcanic rock)
igneous
Basalt with Plagioclase Phenocryst
Porphyritic Basalt
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Vesicular Basalt (Amygdaloidal)
Vesicular Basalt (Fe-Mg rich extrusive volcanic rock)
igneous
Basalt
Extrusive mafic igneous rock
igneous
Basalt
Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)
igneous
Vesicular volcanic rock, likely pumice or scoriaceous basalt
Pumice (highly vesicular volcanic glass) or vesicular basalt; exact identification requires testing
igneous
Basalt
Basalt (containing mainly Plagioclase feldspar and Pyroxene)
igneous
Basalt
Mafic Igneous Rock (composed primarily of Plagioclase and Pyroxene)
igneous
Basalt
Mafic Volcanic Rock
igneous
Dark gray weathered pebble, likely basalt
Basalt; chiefly plagioclase feldspar, pyroxene, and commonly olivine or iron oxides
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Weathered mafic rock, likely basalt or greenstone
Fine-grained basaltic rock; possibly altered basalt (metabasalt/greenstone)
igneous
Basalt
Mafic volcanic rock (primarily Plagioclase and Pyroxene)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Rounded basalt pebble
Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, with possible olivine
igneous
Basalt
Basalt (Vitreous to Aphanitic Mafic Igneous Rock)
igneous
Basalt
Extrusive Mafic Igneous Rock (composed primarily of Plagioclase, Pyroxene, and Olivine)
igneous