Rounded dark volcanic pebble
Likely basalt or basaltic andesite
igneous
Category
Basalt
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Basalt
Basalt — fine-grained mafic volcanic rock, primarily plagioclase and pyroxene, commonly with olivine
igneous
Basalt
Basalt; fine-grained mafic volcanic rock, mainly plagioclase and pyroxene with possible olivine
igneous
Basalt
Fine-grained mafic volcanic rock, chiefly plagioclase feldspar and pyroxene, commonly with olivine
igneous
Basalt
Basalt; fine-grained mafic volcanic rock, chiefly plagioclase, pyroxene, and commonly olivine
igneous
Basalt
Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase feldspar, pyroxene, and commonly olivine
igneous
Basalt
Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase, pyroxene, and commonly olivine
igneous
Basalt
Mafic volcanic rock, chiefly plagioclase feldspar, pyroxene, and commonly olivine or magnetite
igneous
Basalt
Aphanitic basaltic rock
igneous
Basalt
Mafic extrusive igneous rock
igneous
Basalt
Basalt (extrusive volcanic rock)
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt
Basalt (Mafic Extrusive)
igneous
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Basalt
Aphanitic Mafic Volcanic Rock
igneous
Basalt
Basalt (extrusive igneous rock)
igneous
Basalt
Mafic Igneous Rock
igneous
Basalt
Aphanitic Mafic Volcanic Rock (Fe/Mg rich)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt
Basalt (extrusive volcanic rock)
igneous
Basalt
Extrusive mafic volcanic rock
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Basalt
Mafic Igneous Rock (Basalt)
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt
Extrusive Igneous Rock
igneous
Basalt
Extrusive Igneous Rock
igneous
Basalt
Extrusive Igneous Rock
igneous
Basalt
Extrusive Igneous Rock
igneous
Basalt
Extrusive Igneous Rock
igneous
Basalt
Extrusive Igneous Rock
igneous
Basalt
Extrusive Igneous Rock
igneous
Basalt
Extrusive Igneous Rock
igneous
Basalt
Extrusive Igneous Rock
igneous
Basalt
Extrusive Igneous Rock
igneous
Basalt
Extrusive igneous rock
igneous
Basalt
Extrusive Igneous Rock
igneous
Basalt
Mafic extrusive igneous rock
igneous
Basalt
Extrusive Igneous Rock
igneous
Basalt
Extrusive Igneous Rock
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous