Rock Identifier

Category

Sedimentary (Fossilized Organic Remain)

Browse sedimentary (fossilized organic remain) specimens identified by the Rock Identifier community.

Quartz on Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz on Matrix

Silicon Dioxide (SiO2)

Quartz (likely milky/rose quartz variety) (Quartz (SiO2 - Silicon Dioxide)) — Mineral

Quartz (likely milky/rose quartz variety)

Quartz (SiO2 - Silicon Dioxide)

Sandstone (Ferruginous) (Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)) — sedimentary

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

Sandstone (likely Siltstone or Mudstone variety) (Clastic Sedimentary Rock (primarily SiO2 with iron oxides)) — sedimentary

Sandstone (likely Siltstone or Mudstone variety)

Clastic Sedimentary Rock (primarily SiO2 with iron oxides)

Quartz Veinated Sandstone or Siltstone (Silicon Dioxide (SiO2) within a clastic sedimentary matrix) — sedimentary

Quartz Veinated Sandstone or Siltstone

Silicon Dioxide (SiO2) within a clastic sedimentary matrix

Quartz-veined Siltstone/Greywacke (Clastic Sedimentary Rock with Quartz Infill (SiO2 vein)) — sedimentary

Quartz-veined Siltstone/Greywacke

Clastic Sedimentary Rock with Quartz Infill (SiO2 vein)

Chert Conglomerate (or Breccia) (Sedimentary Clastic Rock (variety: Ferruginous Chert Breccia)) — sedimentary

Chert Conglomerate (or Breccia)

Sedimentary Clastic Rock (variety: Ferruginous Chert Breccia)

Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)

Ferruginous Conglomerate (or Iron-Rich Concrete/Slag) (Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)) — sedimentary

Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)

Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)

Grey River Pebble (Likely Quartz-rich or Limestone) (Clastic Sedimentary Rock (typically SiO2 or CaCO3 based)) — sedimentary

Grey River Pebble (Likely Quartz-rich or Limestone)

Clastic Sedimentary Rock (typically SiO2 or CaCO3 based)

Sandstone Concretion with Quartz Center (Sedimentary Clastic Rock (SiO2 matrix with Quartz core)) — sedimentary

Sandstone Concretion with Quartz Center

Sedimentary Clastic Rock (SiO2 matrix with Quartz core)

Milky Quartz in Conglomerate Matrix (Silicon Dioxide (SiO2) within Clastic Sedimentary Rock) — sedimentary

Milky Quartz in Conglomerate Matrix

Silicon Dioxide (SiO2) within Clastic Sedimentary Rock

Sandstone (Quartzose Sandstone) (Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)

Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Conglomerate with Quartz Inclusions (Conglomerate (clastic sedimentary rock) with internal Quartz (SiO2)) — sedimentary

Conglomerate with Quartz Inclusions

Conglomerate (clastic sedimentary rock) with internal Quartz (SiO2)

Limestone (specifically Dolomitic/Crystalline Limestone) (Sedimentary Carbonate Rock (CaCO3 / CaMg(CO3)2)) — sedimentary

Limestone (specifically Dolomitic/Crystalline Limestone)

Sedimentary Carbonate Rock (CaCO3 / CaMg(CO3)2)

Aragonite / Calcite Geode (Calcium Carbonate (CaCO3)) — mineral

Aragonite / Calcite Geode

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Ocherous) (Calcium Carbonate (CaCO3) with Iron Oxide (Limonite)) — sedimentary

Limestone (Ocherous)

Calcium Carbonate (CaCO3) with Iron Oxide (Limonite)

Jasper (Banded Jasper) (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper (Banded Jasper)

Silicon Dioxide (SiO2) with impurities

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Jasper Breccia (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper Breccia

Silicon Dioxide (SiO2) with impurities

Picture Jasper (Silicon Dioxide (SiO2)) — sedimentary

Picture Jasper

Silicon Dioxide (SiO2)

Quartzite Pebble (River Rock) (Quartzite (mainly SiO2)) — metamorphic

Quartzite Pebble (River Rock)

Quartzite (mainly SiO2)

Echinoid Fossil (Sea Urchin Fossil) (Echinoidea (phylum Echinodermata), often preserved as Calcite (CaCO3)) — sedimentary

Echinoid Fossil (Sea Urchin Fossil)

Echinoidea (phylum Echinodermata), often preserved as Calcite (CaCO3)

Sandstone (with Iron Oxide staining) (Arenite (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (with Iron Oxide staining)

Arenite (primarily SiO2 with Fe2O3 staining)

Quartzite Pebble (Metamorphic Quartz (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartz (SiO2)

Chert (Jasper variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Sandstone (Arenite (primarily Quartz, SiO2)) — sedimentary

Sandstone

Arenite (primarily Quartz, SiO2)

Citrine Geode (Citrine (Silicon Dioxide, SiO2)) — mineral

Citrine Geode

Citrine (Silicon Dioxide, SiO2)

Siltstone (Siltstone) — sedimentary

Siltstone

Siltstone

Chert / Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / Jasper

Microcrystalline Quartz (SiO2)

Ocherous Sandstone (Ferruginous Sandstone) (Ferruginous Arenite (SiO2 with Fe2O3)) — sedimentary

Ocherous Sandstone (Ferruginous Sandstone)

Ferruginous Arenite (SiO2 with Fe2O3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Chert (varieties include Flint and Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (varieties include Flint and Jasper)

Silicon Dioxide (SiO2)

Sandstone (likely Quartzose Sandstone) (Arenite) — sedimentary

Sandstone (likely Quartzose Sandstone)

Arenite

Jasper (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Chert (specifically Jasper) (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Chert (specifically Jasper)

Silicon dioxide (SiO2) with iron oxide inclusions

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone (Ferruginous) (Ferruginous Sandstone (SiO2 with iron oxide cement)) — sedimentary

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with iron oxide cement)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Ferruginous) (Arenite (Fe-rich)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe-rich)