Sedimentary (Base), Then Artificial

Sandstone (with potentially high Feldspar/Arkose content)

Clastic sedimentary rock (SiO2 dominated)

Ironstone (with possible Hematite/Limonite coating)

Ironstone (Fe-rich sedimentary rock)

Coquina

Biogenic Limestone (Calcite, CaCO3)

Chert Breccia

Brecciated Chert (SiO2)

Chert (with Limestone and Iron Oxide staining)

Cryptocrystalline Quartz (SiO2)

Sandstone (Quartzose Sandstone)

Arenite (SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Greywacke (River Slikenside)

Greywacke (Lithic Sandstone)

Greywacke

Lithic wacke (variety of Sandstone)

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Sandstone (likely Siltstone)

Arenite or Siltstone (high SiO2 content)

Shale

Fissile mudrock (composed of clay-sized particles and detrital grains)

Grey River Pebble (Likely Quartz-rich or Limestone)

Clastic Sedimentary Rock (typically SiO2 or CaCO3 based)

Conglomerate

Conglomerate (clastic sedimentary rock)

Sandstone

Arenite (SiO2 based typically)

Leopard Skin Jasper

Jasper (Silicon Dioxide with impurities), SiO2

Chert (and Limestone)

Silicon Dioxide (SiO2) in Calcium Carbonate (CaCO3)

Fossilized Brachiopod

Brachiopoda (e.g., Rhynchonellida or Spiriferida)

Sandstone

Arenite (Secondary classification based on grain size)

Sandstone (Quartz Arenite)

Sandstone (SiO2 with possible mineral cements)

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily SiO2 with FeO(OH) impurities)

Chert Pebble with Quartz Veining

Microcrystalline Quartz (SiO2)

Blue Celestite (Celestine)

Strontium sulfate (SrSO4)

Tufa

Calcium carbonate (CaCO3) - Porous Limestone

Quartz-veined Siltstone

Siltstone with Quartz (SiO2) veins

Quartz-veined Siltstone/Greywacke

Clastic Sedimentary Rock with Quartz Infill (SiO2 vein)

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Quartzose Sandstone)

Arenite (SiO2 primarily)

Coquina

Coquina Limestone

Sandstone (River Cobble)

Clastic sedimentary rock (primarily SiO2 with various lithic fragments)

Sandstone (likely Greywacke or Lithic Sandstone)

Arenite / Wacke

Sandstone (Greywacke)

Clastic Sedimentary Rock (SiO2 with lithic fragments)

Wishing Stone (Sandstone with Quartz Vein)

Arenite with Quartzite intrusion (SiO₂)

Siltstone

Siltstone (fined-grained clastic sedimentary rock)

Limestone (Fossiliferous)

Calcium Carbonate (CaCO3) - Bioclastic Limestone

Limestone

Calcium Carbonate (CaCO3)

Sandstone

Arenite (primarily SiO2)

Coquina

Bioclastic Limestone (composed primarily of CaCO3)

Conglomerate

Conglomerate (Rock composed predominantly of rounded clasts > 2mm)

Breccia

Breccia - Clastic sedimentary rock

Shale (with Iron Oxide staining)

Fissile Mudstone (primarily Quartz and Clay minerals)

Limestone

Sedimentary Calcium Carbonate (CaCO3)