Rock Identifier

Category

Basalt

Browse basalt specimens identified by the Rock Identifier community.

Learn about Basalt in the encyclopedia

Basalt

Tholeiitic Basalt

Tholeiitic Basalt

Metabasalt

Variolite

Tachylite

Gabbro

Sideromelane

Palagonite

Diabase

Greenstone

Limburgite

Scoria

Veined basalt (likely basalt with quartz/calcite vein) (Basalt, aphanitic mafic volcanic rock; vein minerals likely quartz (SiO₂) or calcite (CaCO₃)) — igneous

Veined basalt (likely basalt with quartz/calcite vein)

Basalt, aphanitic mafic volcanic rock; vein minerals likely quartz (SiO₂) or calcite (CaCO₃)

Basalt (Mafic volcanic rock (various silicate minerals)) — igneous

Basalt

Mafic volcanic rock (various silicate minerals)

Scoria (Vesicular Basalt / Scoriaceous Basalt) — igneous

Scoria

Vesicular Basalt / Scoriaceous Basalt

Scoria (Vesicular Basalt / Scoriaceous Basalt) — igneous

Scoria

Vesicular Basalt / Scoriaceous Basalt

Basalt with Scoria (Amygdaloidal Basalt / Vesicular Basalt) — igneous

Basalt with Scoria

Amygdaloidal Basalt / Vesicular Basalt

Basalt (Vesicular and Ropey) (Vesicular Basalt / Pahoehoe Basalt) — igneous

Basalt (Vesicular and Ropey)

Vesicular Basalt / Pahoehoe Basalt

Likely tumbled basalt or vesicular volcanic rock (Basalt, possibly amygdaloidal basalt) — igneous

Likely tumbled basalt or vesicular volcanic rock

Basalt, possibly amygdaloidal basalt

Porphyritic Basalt (Porphyry pebble) (Porphyritic Basalt / Amygdaloidal Basalt) — igneous

Porphyritic Basalt (Porphyry pebble)

Porphyritic Basalt / Amygdaloidal Basalt

Basalt (Greenstone) (Amygdaloidal Basalt / Chloritized Basalt) — Igneous

Basalt (Greenstone)

Amygdaloidal Basalt / Chloritized Basalt

Basalt with Plagioclase Feldspar (Basalt (mafic extrusive igneous rock) with plagioclase feldspar phenocrysts) — Igneous

Basalt with Plagioclase Feldspar

Basalt (mafic extrusive igneous rock) with plagioclase feldspar phenocrysts

Dark mafic rock, likely basalt (Basalt; primarily plagioclase feldspar, pyroxene, and commonly olivine) — igneous

Dark mafic rock, likely basalt

Basalt; primarily plagioclase feldspar, pyroxene, and commonly olivine

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Vesicular Basalt (Vesicular Basalt (Aphanitic Mafic Igneous Rock)) — igneous

Vesicular Basalt

Vesicular Basalt (Aphanitic Mafic Igneous Rock)

Basalt (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Vesicular basalt (scoriaceous basalt) (Basalt; chiefly plagioclase feldspar, pyroxene, and often olivine) — igneous

Vesicular basalt (scoriaceous basalt)

Basalt; chiefly plagioclase feldspar, pyroxene, and often olivine

Weathered volcanic rock, likely basaltic scoria (Vesicular basalt/scoria; primarily plagioclase, pyroxene, olivine, and iron oxides) — igneous

Weathered volcanic rock, likely basaltic scoria

Vesicular basalt/scoria; primarily plagioclase, pyroxene, olivine, and iron oxides

Okenite (Okenite, Ca3Si6O15·6H2O) — mineral

Okenite

Okenite, Ca3Si6O15·6H2O

Vesicular Basalt with Quartz/Chalcedony (Vesicular Basalt (primarily Plagioclase, Pyroxene, and Olivine with SiO2 infill)) — igneous

Vesicular Basalt with Quartz/Chalcedony

Vesicular Basalt (primarily Plagioclase, Pyroxene, and Olivine with SiO2 infill)

Probable rough basalt or mafic igneous fragment (Fine-grained basalt, likely plagioclase–pyroxene–olivine aggregate) — igneous

Probable rough basalt or mafic igneous fragment

Fine-grained basalt, likely plagioclase–pyroxene–olivine aggregate

Basalt Pebble (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt Pebble

Basalt (Mafic Extrusive Igneous Rock)

Basalt Gravel (Aphanitic Mafic Igneous Rock) — igneous

Basalt Gravel

Aphanitic Mafic Igneous Rock

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt with Quartz Vein (Basalt (fine-grained mafic igneous rock) with crystalline Quartz (SiO2)) — igneous

Basalt with Quartz Vein

Basalt (fine-grained mafic igneous rock) with crystalline Quartz (SiO2)

Basalt with Calcite Veining (Aphanitic Mafic Igneous Rock (Basalt) with CaCO3) — igneous

Basalt with Calcite Veining

Aphanitic Mafic Igneous Rock (Basalt) with CaCO3

Basalt with Calcite Veins (Basalt (Mafic Volcanic Rock)) — igneous

Basalt with Calcite Veins

Basalt (Mafic Volcanic Rock)

Gabbro (Gabbro) — igneous

Gabbro

Gabbro

Basalt (Basalt (Aphanitic Mafic Volcanic Rock)) — igneous

Basalt

Basalt (Aphanitic Mafic Volcanic Rock)

Basalt Pebble (Mafic Igneous Rock (Basalt)) — igneous

Basalt Pebble

Mafic Igneous Rock (Basalt)

Gabbro (River Cobble) (Phaneritic Mafic Igneous Rock) — igneous

Gabbro (River Cobble)

Phaneritic Mafic Igneous Rock

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt (Aphanitic Mafic Igneous Rock) — igneous

Basalt

Aphanitic Mafic Igneous Rock

Dark volcanic rock, likely basalt (Basalt; predominantly plagioclase feldspar and pyroxene, commonly with minor olivine and magnetite) — igneous

Dark volcanic rock, likely basalt

Basalt; predominantly plagioclase feldspar and pyroxene, commonly with minor olivine and magnetite

Basalt (Mafic Fine-Grained Igneous Rock) — igneous

Basalt

Mafic Fine-Grained Igneous Rock

Weathered basalt or mafic volcanic rock (Basalt; primarily plagioclase feldspar, pyroxene, and possibly olivine) — igneous

Weathered basalt or mafic volcanic rock

Basalt; primarily plagioclase feldspar, pyroxene, and possibly olivine

Basalt (Basalt (dominated by plagioclase feldspar, pyroxene, and olivine)) — igneous

Basalt

Basalt (dominated by plagioclase feldspar, pyroxene, and olivine)

Gabbro (Plutonic mafic rock) — igneous

Gabbro

Plutonic mafic rock

Basalt (Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)) — igneous

Basalt

Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)

Basalt with Iron Oxidation (Mafic Igneous Rock (Basalt)) — igneous

Basalt with Iron Oxidation

Mafic Igneous Rock (Basalt)

Basalt (Basalt (comprising Plagioclase feldspar, Pyroxene, and Olivine)) — igneous

Basalt

Basalt (comprising Plagioclase feldspar, Pyroxene, and Olivine)

Basalt (Concrete Aggregate) (Basalt (Mafic volcanic rock)) — igneous

Basalt (Concrete Aggregate)

Basalt (Mafic volcanic rock)

Basalt (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Basalt (Basalt (primarily composed of Plagioclase feldspar and Pyroxene)) — igneous

Basalt

Basalt (primarily composed of Plagioclase feldspar and Pyroxene)