Orthoceratid Fossil in Limestone
Orthoceras (extinct genus of Nautiloid Cephalopod)
Category
Browse sedimentary (artificial) specimens identified by the Rock Identifier community.
Orthoceratid Fossil in Limestone
Orthoceras (extinct genus of Nautiloid Cephalopod)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Red Sandstone
Arenite (primarily composed of SiO2 with Fe2O3 cement)
Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
Petrified Wood
Silicified wood (Quartz, Chalcedony, or Opal)
Red Jasper (Chert)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Chert (with Limestone/Dolomite host)
Microcrystalline Quartz (SiO2)
Shale
Fissile Mudstone (primarily composed of clay minerals and quartz grains)
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
Chert
Chert (microcrystalline quartz, SiO2)
Sandstone
Clastic Sedimentary Rock (composed mostly of quartz and/or feldspar)
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
Sandstone (with Feldspathic/Arkose qualities)
Arenite (primarily SiO2 with KAlSi3O8 components)
Sandstone
Arenite (composed primarily of SiO2)
Crushed Limestone
Calcium Carbonate (CaCO3)
Travertine
Calcareous Tufa (CaCO3)
Red Siltstone
Siltstone (composed mainly of SiO2 and Fe2O3)
Sandstone
Arenite (primarily Quartz SiO2)
Sandstone
Arenite
Ferruginous Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
Sandstone (Ferruginous)
Arenite (with high iron oxide content)
Sandstone Pebble
Arenite (primarily SiO2)
Fossiliferous Limestone
Biogenic Calcium Carbonate (CaCO3)
Limestone (specifically Marl or Chalk)
Calcium Carbonate (CaCO3)
Sandstone (specifically Arkose or Ferruginous Sandstone)
Sandstone (SiO2 with iron oxide inclusions)
Sandstone
Arenite (primarily Quartz, SiO2)
Sandstone (with Iron concretions/staining)
Arenite (composed primarily of Quartz and Feldspar with Iron Oxide cement)
Sandstone
Arenite (variable SiO2 composition)
Sandstone (Ferruginous)
Arenite with Iron Oxide (Limonite/Hematite) coating
Sandstone (likely Siltstone variety)
Arenite / Siltstone (primary mineral SiO2)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Fe2O3 staining)
Sandstone (with Limonite staining)
Arenite (primarily SiO2 with FeO(OH)·nH2O)
Sandstone
Arenite
Sandstone
Arenite (composed primarily of SiO2)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with Fe2O3/FeO(OH) cement)
Chert (Nodule)
Silicon dioxide (SiO2) - Cryptocrystalline Quartz
Chert (specifically Flint or Jasper variant)
Chert (Siliceous rock composed of microcrystalline Quartz, SiO2)
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 oxides)