Dark mafic igneous rock, likely basalt or gabbro
Basalt–gabbroic rock; chiefly plagioclase feldspar and pyroxene, possibly olivine
igneous
Category
Igneous Rock
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Granite Pebble
Granite
igneous
Fine-grained dark igneous rock, likely basalt
Basalt; predominantly plagioclase feldspar and pyroxene, commonly with minor olivine and iron-titanium oxides
igneous
Likely basalt or other dark igneous rock
Basalt; predominantly plagioclase feldspar and pyroxene, possibly olivine
igneous
Dark mafic igneous rock, likely basalt or gabbro
Basalt–gabbroic rock; chiefly plagioclase feldspar and pyroxene, possibly olivine
igneous
Dark mafic igneous rock, likely basalt or gabbro
Basalt–gabbroic rock; chiefly plagioclase feldspar and pyroxene, possibly olivine and iron oxides
igneous
Fine-grained gray igneous rock, likely basalt
Basalt; primarily plagioclase feldspar and pyroxene, commonly with olivine and iron-titanium oxides
igneous
Dark mafic igneous rock, likely basalt or gabbro
Basaltic rock composed chiefly of plagioclase feldspar and pyroxene, with possible olivine and iron-oxide minerals
igneous
Fine-grained dark igneous rock, likely basalt
Basalt (approximate identification; commonly plagioclase, pyroxene, and minor olivine)
igneous
Dark mafic igneous rock, likely basalt or gabbro
Basalt–gabbroic rock; mainly plagioclase feldspar and pyroxene, possibly olivine or magnetite
igneous
Dark mafic igneous rock, likely basalt or gabbro
Basalt–gabbroic rock; chiefly plagioclase feldspar and pyroxene, possibly olivine and iron oxides
igneous
Conglomerate
Polymictic conglomerate; rounded clasts cemented in a fine-grained matrix
sedimentary
Weathered red sandstone cobble
Quartz-rich sandstone, likely ferruginous arkose or litharenite
sedimentary
Granite
Intrusive Igneous Rock
igneous
Granite Pebble
Granite
igneous
Granite or Porphyritic Igneous Rock (weathered)
Granitoid
Igneous
Granite
Intrusive igneous rock
igneous
Granite Pebble
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Coarse-grained granite (likely biotite granite)
Granite, composed mainly of quartz and feldspar with dark biotite or amphibole
igneous
Crushed Granite / Landscaping Gravel
Granitoid
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Intrusive Igneous Rock (Felsic)
igneous
Granite
Felsic intrusive igneous rock
igneous
Quartz Vein in Granite Pebble
Granitic rock with Quartz (SiO2) vein intrusion
igneous
Granite (Phaneritic Igneous Rock)
Granite
igneous
Pink Granite / K-Feldspar
Alkali feldspar granite / Potassium feldspar (Microcline/Orthoclase)
igneous
Quartz (Milky/Rose Quartz)
Silicon Dioxide (SiO2)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Granite Boulder
Intrusive Igneous Rock
igneous
Granite Pebble
Phaneritic Igneous Rock
igneous
Granite Pebble
Intrusive Igneous Rock
igneous
Granite Boulder
Intrusive Igneous Rock
igneous
Granite Pebble
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite River Rock
Intrusive igneous rock (composed mainly of quartz, alkali feldspar, and plagioclase)
igneous
Granite Pebble
Intrusive Igneous Rock (Quartz, Feldspar, Mica)
igneous