Granite
Felsic intrusive igneous rock
Category
Browse mineral on sedimentary rock specimens identified by the Rock Identifier community.
Granite
Felsic intrusive igneous rock
Shale
Argillite / Shaly Mudstone
Breccia
Breccia (Sedimentary Clastic Rock)
Sandstone Concretion
Sedimentary concretion
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
Shale
Lutaceous Rock (Hydrous Aluminum Silicates)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Banded gneiss
Foliated gneiss, likely quartz–feldspar–biotite or amphibole gneiss
Red Sandstone Pebble
Sedimentary quartz sandstone
Orange Quartz (or Carnelian Chalcedony)
Silicon Dioxide (SiO2)
Quartz-veined Sandstone Pebble
Quartzose Sandstone with Quartz Veinlets
Quartz-Veined Slate or Greenstone
Metamorphic rock with quartz vein (SiO2)
Sandstone
Arenite (SiO2 predominantly)
Silty Shale
Silty Shale (Fissile Sedimentary Rock)
Quartz
Silicon Dioxide (SiO2)
Pyrite in Shale
Iron Disulfide (FeS2)
Sandstone
Clastic Sedimentary Rock
Waterworn pebble, possibly iron-rich basalt or river stone
Unidentified lithic clast; composition cannot be determined reliably from the image
Red Sandstone
Arenite (primarily quartz with iron oxide cement)
Sandstone
Clastic Sedimentary Rock (composed mostly of SiO2)
Sandstone
Clastic sedimentary rock (Quartz arenite or Arkose)
Fossil bivalve or brachiopod in sedimentary rock
Unidentified fossil shell impression; likely a ribbed bivalve or brachiopod preserved in shale/siltstone
Sandstone
Arenite
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone Cobble
Clastic Sedimentary (Sandstone)
Painted River Rock
Artificially Coated Sedimentary Rock
Painted Sandstone
Sandstone (clastic sedimentary rock) with acrylic/artistic coating
Purple Chalcedony
Silicon Dioxide (SiO2)
Sandstone (Iron-stained)
Arenite with Limonite/Hematite staining
Agate (specifically a Yellow/Honey Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Sandstone with Manganese Staining
Quartz Arenite / Sedimentary Rock
Sandstone (Quartzite-rich)
Clastic sedimentary rock (SiO2 primary)
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 oxides)
Sandstone
Arenite
Quartz Druzy (Geode Fragment)
Silicon Dioxide (SiO2)
Gneiss (rounded cobble)
Quartz–feldspar–mica gneiss; exact mineral proportions cannot be determined from the image
Sandstone
Arenite
Banded Slate
Slate (Metamorphosed Siltstone/Mudstone)
Worn River Pebble with Fossil Indentation
Sedimentary Rock with Fossil Infill
Veined Quartzite / Vein-filled Sedimentary Rock
Siliciclastic rock with iron oxide-filled fractures
Shale
Argillaceous Rock
Sandstone and Mixed Rock Assemblage
Clastic Sedimentary Rock / Quartz Arenite