Sandstone (River Rock)
Arenite (composed primarily of SiO2)
sedimentary
Category
Anthropogenic Sedimentary (Man Made)
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Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)
sedimentary
Limestone (River Stone)
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Flagstone)
Arenite (composed primarily of SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone with Calcite Vein
Clastic sedimentary rock (primarily SiO2) with Calcium Carbonate (CaCO3) infilling
sedimentary
Quartz Pebble / River Silt Grain
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (major component SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone (with possible Crinoid or Fossil Impression)
Calcium Carbonate (CaCO3) / Calcite
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-oxide enriched)
sedimentary
Fossiliferous Limestone
Carbonate Sedimentary Rock (primarily CaCO3)
sedimentary
Soft Limestone
Calcite-rich Sedimentary Rock (CaCO3)
sedimentary
Sandstone (Quartzose)
Arenite (SiO2 based typically)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone with Iron Staining
Arenite with Limonite/Hematite inclusions (SiO2 + Fe2O3/FeO(OH))
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Quartzite-rich)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Limestone
Calcium carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Gray Limestone Pebble
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcareous sedimentary rock (primarily Calcium Carbonate, CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Red Mudstone (Siltstone)
Lutite (primarily Quartz and Clay minerals with Hematite)
sedimentary
Limestone (River Pebble)
Calcite-rich Sedimentary Rock (CaCO3)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Greywacke/Lithic Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary