Sedimentary Rock (Possibly A Conglomerate Or Coarse Grained Sandstone)

Sandstone (Pebble/Cobble)

Sandstone (arenite is a more precise term for sandstone with less than 15% matrix; this specimen appears to be a lithic or quartz arenite)

Sandstone (Quartz-rich)

Arenite (composed mainly of SiO2)

Sandstone

Arenite (Sedimentary rock composed of sand-sized grains)

Sandstone

Sedimentary Rock (Quartz Sandstone)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone

Arenite

Sandstone

Arenite (SiO2 based)

Red Sandstone Pebble

Arenite (Quartz Sandstone / Hematitic Sandstone)

Tumbled feldspar–quartz rock, possibly granite or pegmatite

Feldspar (orthoclase/plagioclase) + quartz, with dark biotite or hornblende

Sandstone

Clastic sedimentary rock (primarily SiO2)

Weathered igneous rock fragment, possibly granite or granitic gneiss

Indeterminate; likely quartz–feldspar–mica aggregate (granite), possibly foliated gneiss

Sandstone (Red/Brown Variety)

Arenite (SiO2 with iron oxide impurities)

Sandstone (Pebble)

Sandstone (SiO2 dominated clastic sedimentary rock)

Sandstone

Sandstone (Arenite)

Weathered quartz-rich rock, possibly quartzite

Quartzite (mostly SiO₂), tentative identification

Weathered sandstone cobble

Quartz-rich sandstone, primarily SiO₂ with clay/iron-oxide cement

Sandstone (Pebble)

Arenite / Clastic Sedimentary Rock

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone

Arenite (primarily Quartz and Feldspar)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Ferruginous)

Clastic Sedimentary Rock (Sandstone)

Sandstone

Arenite (SiO2 based)

Sandstone

Sandstone (clastic sedimentary rock)

Sandstone (likely Arkosic or Lithic Sandstone)

Sandstone (SiO2 predominant)

Sandstone (Pebble)

Sandstone (SiO2 with matrix/cement)

Weathered Sandstone Cobble

Arenite / Quartz Sandstone

Sandstone

Sedimentary Clastic Rock (Quartzose Sandstone)

Fossiliferous limestone

Bioclastic carbonate rock, chiefly calcite (CaCO₃)

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite (SiO2 based typically)

Weathered granite or granitic gneiss fragments

Granite; primarily quartz, feldspar, and mica (composition uncertain from image)

Sandstone

Arenite (primarily SiO2)

Sandstone

Sandstone (clastic sedimentary rock)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite (SiO2 based)

Red Sandstone Pebble

Quartzose Sandstone

Sandstone

Arenite

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite

Sandstone (Greywacke)

Arenite / Wacke (SiO2 + varied clasts)

Sandstone

Arenite (primarily SiO2)