Ironstone (likely siderite or goethite-rich siltstone)
Ferruginous Siltstone
sedimentary
Category
Sedimentary (Fossil)
Browse sedimentary (fossil) specimens identified by the Rock Identifier community.
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (SiO2 primary composition)
sedimentary
Sandstone
Arenite
sedimentary
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2, silica)
sedimentary
Stromatolite
Stromatolite (Cyanobacteria-formed Organo-sedimentary structure)
sedimentary
Sandstone (Muddy/Silty Variety)
Arenite with high silt/clay content (clastic sedimentary rock)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Coquina or Fossiliferous Limestone
Fossiliferous Calcarenite (CaCO3)
sedimentary
Coquina or Fossiliferous Limestone
Biogenic Limestone (Calcite/Aragonite CaCO3)
sedimentary
Coquina / Fossiliferous Limestone
Calcareous bioclastic sedimentary rock (CaCO3)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Sandstone (Weathered Cobble)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide staining/cementing)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Fossilized Knightia Fish
Knightia eocaena (set in fossiliferous Micritic Limestone)
sedimentary
Fossiliferous Limestone
Limestone with fossil inclusions (CaCO3)
sedimentary
Kambaba Jasper
Rhyolite (with Stromatolite fossil inclusions)
sedimentary
Sand Dollar Fossil (Echinoidea)
Class Echinoidea (likely order Clypeasteroida), CaCO3 (Calcite)
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Ammonite Fossil
Ammonoidea (Calcium carbonate - CaCO3)
sedimentary
Bryozoan Fossil
Phylum Bryozoa (commonly known as 'moss animals')
sedimentary
Sandstone (Quartz-rich)
Arenite (SiO2 based)
sedimentary
Fossiliferous Limestone
Limestone (composed primarily of calcite with included fossils CaCO3)
Sedimentary
Sandstone (Quartz-rich)
Clastic sedimentary rock (SiO2 primary)
sedimentary
Sandstone (specifically Lithic or Quartz Arenite)
Arenite (composed primarily of SiO2)
sedimentary
Crinoid Marble (Fossilized Limestone)
Crinoidal Limestone (comprising Calcite/Aragonite CaCO3)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Red Sandstone
Arenite (predominantly SiO2 with Fe2O3)
sedimentary
Fossil Coral
Coral Limestone (a type of biogenic sedimentary rock)
Sedimentary
Fossil Coral
Scleractinia (Anthos), primarily Calcium Carbonate (CaCO3)
sedimentary
Fossil Coral
Fossilized Scleractinia or Tabulata (various genera/species)
Sedimentary
Goniatite Fossil
Goniatitida (Order), fossilized in limestone/calcite (CaCO3)
sedimentary
Ammonite Fossil
Ammonoidea (typically preserved as Calcite CaCO3 or Pyrite FeS2)
sedimentary
Ammonite Fossil
Ammonoidea (primarily composed of Calcite, CaCO3, or Pyrite)
sedimentary
Belemnite Fossil
Belemnitida (extinct order of Cephalopods)
sedimentary
Calamites (Fossil)
Calamites sp. (Tracheophyta, Equisetopsida)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary