River cobble (Greywacke/Sandstone)
Sandstone / Greywacke
Category
Browse sedimentary rock (specifically a clastic sedimentary rock formed into a cobble) specimens identified by the Rock Identifier community.
River cobble (Greywacke/Sandstone)
Sandstone / Greywacke
Sandstone
Arenite (SiO2 based)
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Conglomerate
Polymictic Conglomerate
Dalmatian Stone
Dalmatian Jasper (Aplitic Rock)
Sandstone (Ferruginous)
Clastic Sedimentary Rock (SiO2 with Fe2O3)
Sandstone (likely Greywacke or Lithic Sandstone)
Arenite / Wacke
Sandstone (likely Fossiliferous Sandstone)
Clastic sedimentary rock (primarily SiO2)
Sandstone
Arenite
Sandstone (Weathered Pebble)
Sedimentary Rock (Quartz arenite)
Sandstone (with potential trace fossils)
Clastic sedimentary rock (primarily SiO2)
Sandstone
Sedimentary Rock (Quartzose Sandstone)
Sandstone Pebble
Sedimentary Clastic Rock (Quartz Arenite)
Sandstone (likely Graywacke or Arkose variant)
Clastic Sedimentary Rock (Lithic Sandstone)
Sandstone
Arenite (SiO2 primarily)
Sandstone
Arenite (predominantly SiO2 quartz grains)
Quartz-veined Sandstone Pebble
Quartzose Sandstone with Quartz Veinlets
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and organic impurities
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
Sandstone pebble
Clastic sedimentary rock (primarily SiO2)
River Rocks (Basalt and Sedimentary Stones)
Mafic Igneous Rock (Basalt) and Clastic Sedimentary Rock
Sandstone
Arenite
Sandstone
Arenite (SiO2 principal)
Gneiss (Cobble)
Gneiss
Sandstone
Sandstone (clastic sedimentary rock composite)
Sandstone
Arenite (Siliclastic sedimentary rock)
Quartz
Silicon Dioxide (SiO2)
Pyrite-rich Ore
Pyrite (FeS2) with secondary minerals
Weathered metamorphic rock, likely gneiss or schist
Indeterminate foliated silicate rock; commonly quartz–feldspar–mica assemblage
Sandstone
Arenite
Limestone (specifically Travertine or Tufa)
Calcium Carbonate (CaCO3)
Shale
Lutaceous Rock (Sedimentary Mudrock)
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (SiO2 dominated)
Sandstone
Arenite (SiO2 primarily)
Sandstone (with Iron Staining)
Arenite (Siliclastic sedimentary rock)
Sandstone (likely Calcareous or Micaceous)
Clastic sedimentary rock (primarily Quartz with Cementing Agents)
Sandstone
Arenite
Limestone
Calcium Carbonate (CaCO3)
Sandstone (with minor quartz and possible clay components)
Clastic Sedimentary Rock (SiO2 dominated)
Sandstone
Arenite
Sandstone
Arenite (SiO2 based)