Sedimentary Rock (Possibly A Conglomerate Or Coarse Grained Sandstone)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Sandstone (likely Arkose or Quartz Sandstone)

Arenite (SiO2 principal component)

Sandstone

Arenite (predominantly Quartz Sandstone)

Asphalt Concrete (Bituminous Conglomerate)

Anthropogenic Bituminous Conglomerate

Chert (or possibly Flint)

SiO2 (Silicon Dioxide)

Sandstone (with potential iron-oxide staining)

Arenite (primarily SiO2)

Sandstone (Quartzose Sandstone)

Arenite (primarily SiO2)

Sandstone (Weathered Cobble)

Clastic sedimentary rock (primarily SiO2)

Sandstone (Quartz-rich)

Arenite (primarily SiO2)

Sandstone

Arenite

Sandstone or Quartzite

Arenite (if sedimentary) / Quartzite (if metamorphic)

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz with Fe2O3 staining)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)

Sandstone (likely Calcareous or Quartz-rich)

Arenite (SiO2 based typically)

Sandstone

Clastic Sedimentary Rock (composed primarily of Quartz: SiO2)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock - Arenite

Sandstone

Sandstone (lithified quartz arenite, arkose, graywacke, etc. depending on composition)

Sandstone (Banded)

Clastic Sedimentary Rock: Arenite

Sandstone (Ferruginous)

Arenite (with Iron Oxide)

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (primarily SiO2)

River Pebble (Gravel)

Clastic sedimentary rock (likely Siltstone or Mudstone pebble; SiO2 with various impurities)

Sandstone

Clastic Sedimentary Rock (composed mostly of quartz and/or feldspar)

Jasper Conglomerate

Jasperoid Conglomerate (predominantly SiO2 with iron oxide impurities)

Sandstone (Micaceous)

Arenite (composed primarily of SiO2)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 cement)

Sandstone (Ferruginous)

Arenite with Iron Oxide (Limonite/Hematite) coating

Sandstone

Arenite

Sandstone (Ferruginous)

Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)

Sandstone

Arenite (composed primarily of Quartz, SiO2)

Sandstone

Arenite (primarily SiO2)

Sandstone (likely Quartzose Sandstone pebble)

Arenite (primarily SiO2)

Quartz in Matrix (possibly Basalt or Siltstone host)

Silicon Dioxide (SiO2) in Host Rock

Sandstone (Pebble)

Sandstone (arenite, arkose, wacke depending on composition)

Sandstone (with Lichen)

Arenite (composed primarily of SiO2)

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite (predominantly SiO2)

Sandstone (likely Arkosic)

Clastic Sedimentary Rock (primarily SiO2 with Feldspar)

Granular Sandstone

Arenite (variable composition, primarily SiO2)

Sandstone

Arenite (composed primarily of SiO2)