Sedimentary

Quartz Geode

Silicon Dioxide (SiO2) within a secondary sedimentary structure

Quartz Geode

Silicon Dioxide (SiO2) within a secondary sedimentary structure

Siltstone with flute casts or scratch marks

Clastic Sedimentary Rock (Siltstone/Fine-grained Sandstone)

River Stone (likely Siltstone or fine-grained Quartzite)

Sedimentary clastic rock containing SiO2 and iron oxides

Sandstone

Arenite (Sedimentary rock composed of sand-sized grains)

Shale (with minor calcite veining)

Clastic sedimentary rock (primarily clay minerals and quartz)

Conglomerate with Fossilized Shark Teeth

Clastic sedimentary rock (Conglomerate) containing Elasmobranchii remains

Sandstone

Arenite (Siliclastic sedimentary rock), SiO2 + various minerals

Sandstone (Red Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)

Sandstone Pebble with Iron Staining

Clastic Sedimentary Rock (primarily Quartz with Fe2O3 oxides)

Sandstone with Manganese Dendrites

Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)

Hag Stone

Calcareous sedimentary rock (often Chert, Flint, or Limestone)

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

Banded Sandstone (River Pebble)

Clastic Sedimentary Rock (primarily Quartzite and Feldspar grains)

Coquina / Limonite-stained Limestone

Sedimentary Limestone with Iron Oxyhydroxide (FeO(OH)·nH2O)

Chert (Iron-stained)

Silicon Dioxide (SiO2)

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Banded Sandstone

Arenite with iron oxide banding

Limestone

Calcium Carbonate (CaCO3)

Limestone

Calcium Carbonate (CaCO3)

Sandstone

Arenite (SiO2 principal component)

Limestone

Calcium Carbonate (CaCO3)

Limestone

Calcium Carbonate (CaCO3)

Siltstone

Siltstone (primarily SiO2 with Al2O3 and Fe2O3)

Sandstone (with Iron Staining)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Sandstone (Quartzose)

Arenite (composed primarily of SiO2)

Limestone with Calcite Veins

Calcium Carbonate (CaCO3)

Sandstone

Arenite (primarily SiO2)

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with iron oxide cement)

Red Sandstone

Clastic Sedimentary Rock (typically contains Quartz and Iron Oxide)

Liesegang Stone (Sandstone with Liesegang Rings)

Clastic sedimentary rock with li-secondary iron oxide mineralization

Sandstone with Liesegang Rings

Clastic sedimentary rock (Sandstone with iron oxide rhythmic precipitation)

Siltstone/Sandstone (possibly Wonderstone or Picture Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide inclusions)

Gravel or Pebble

Clastic Sedimentary Grain (typically composed of Quartz or Silicate minerals)

Sandstone (with Liesegang rings or joints)

Clastic Sedimentary Rock (primarily Quartz with Iron Oxide cement)

Manganese-coated Sandstone

Clastic sedimentary rock with Manganese Oxide (often Pyrolusite or Psilomelane)

Geode with Iron-Stained Quartz/Calcite

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) in Sedimentary Matrix

Mookaite Jasper

Radiolarite (Silica-rich sedimentary rock featuring Hematite and Goethite)

Chert (with Quartz Vein)

Chert (Siliceous sedimentary rock, predominantly Microcrystalline Quartz SiO2)

Ironstone Pebble

Ferruginous sedimentary rock (Fe2O3 / FeO(OH) mixed with SiO2)

Sandstone (River Cobble)

Clastic sedimentary rock (primarily SiO2 with various lithic fragments)

Red Sandstone

Clastic Terrigenous Sedimentary Rock (composed mostly of SiO2 with Fe2O3)