Fossiliferous Limestone
Biogenic Calcium Carbonate (CaCO3)
sedimentary
Category
Sedimentary Or Metamorphic (Base Substrate)
Browse sedimentary or metamorphic (base substrate) specimens identified by the Rock Identifier community.
Learn about Sedimentary Or Metamorphic (Base Substrate) in the encyclopedia
View all →
Coquina
Coquina (Bioclastic Limestone)
sedimentary
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Fossiliferous Limestone (containing Brachiopods)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Mica Schist
Metamorphic Rock (Schistose)
metamorphic
Limestone
Calcareous sedimentary rock (primarily CaCO3)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Brown Marble
Metamorphic Limestone (CaCO3)
metamorphic
Sandstone (Muddy/Silty Variety)
Arenite with high silt/clay content (clastic sedimentary rock)
sedimentary
Sandstone (Quartz Sandstone)
Arenite (primarily SiO2)
sedimentary
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
River Cobble (Gneiss/Schist mix)
Foliated Metamorphic Rock (Gneissic/Schistose)
metamorphic
Gneiss
Feldspar–quartz–mica gneiss, locally amphibole-bearing
metamorphic
Mica Schist
Schist (biotite/muscovite schist)
metamorphic
Sandstone (Iron-stained)
Clastic sedimentary rock (SiO2 with Fe2O3 staining)
sedimentary
Sandstone
Arenite (Siliclastic sedimentary rock, primarily SiO2)
sedimentary
Ironstone (Limonitic Shale)
Ferruginous Siltstone / Goethite-rich Sedimentary Rock
sedimentary
Banded Gneiss
Gneiss (SiO2 enriched metamorphic rock)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Mineral
Quartzite Pebble
Metamorphic Quartz (SiO2)
metamorphic
Slate
Foliated Metamorphic Rock
metamorphic
Likely weathered metamorphic rock (quartzite or schist)
Quartz-rich foliated metamorphic rock; exact identification requires testing
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Calcite-rich limestone
Limestone, primarily calcite (CaCO₃), possibly fossiliferous or dolomitic
sedimentary
Mica Group Minerals
There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).
Mineral
Mica Schist
Mica Schist (Quartz-Mica Schist)
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (Cloudy Gray)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Sandstone (Glauconitic)
Glauconitic Quartz Sandstone (SiO2 + (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Limestone
Limestone (CaCO3)
sedimentary
Chert (White Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Hardened Gray Mudstone
Argillite / Silicified Mudstone (principally SiO2 and Al2Si2O5(OH)4)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Red Sandstone
Arenite (with Iron Oxide / Hematite staining)
sedimentary
Siltstone Pebble
Siltstone (composed of microscopic quartz and clay minerals)
sedimentary
Chert pebble
Microcrystalline silica (SiO2)
sedimentary
Caliche (with Lichen Cover)
Calcium carbonate-cemented soil layer (CaCO3)
sedimentary
Coquina
Bioclastic Limestone (composed primarily of CaCO3)
sedimentary
Chert (Iron-Stained)
Silicon Dioxide (SiO2)
sedimentary