Sedimentary Rock (Possibly A Conglomerate Or Coarse Grained Sandstone)

Weathered sandstone or fine-grained sedimentary rock

Quartz-rich sandstone, possibly arkose or lithic sandstone

Conglomerate

Conglomerate rock

Weathered quartz-rich pebble, likely sandstone or quartzite

Quartzite (SiO₂), possibly ferruginous sandstone

Conglomerate

Clastic sedimentary rock (Polymictic Conglomerate)

Conglomerate with Native Copper

Clastic Sedimentary Rock with Native Copper (Cu)

Conglomerate (Puddingstone)

Conglomerate (specifically, clastic sedimentary rock)

Conglomerate

Polymictic Conglomerate

Dark coarse-grained rock, likely basalt or gabbro

Basalt (fine-grained) or gabbro (coarse-grained), composed mainly of plagioclase feldspar and pyroxene

Sandstone

Clastic sedimentary rock (primarily Quartz and Feldspar)

Coquina or Fossiliferous Conglomerate

Bioclastic Rudstone (variable composition)

Conglomerate

Sedimentary Conglomerate

Puddingstone (specifically Michigan/Gowganda Puddingstone)

Conglomerate (Jasper Conglomerate)

Milky Quartz in Conglomerate Matrix

Silicon Dioxide (SiO2) within Clastic Sedimentary Rock

Siltstone with Fossil Cast

Sedimentary Rock (Siltstone / Fine-grained Sandstone)

Conglomerate

Conglomerate (a clastic sedimentary rock)

Conglomerate

Sedimentary Conglomerate

Conglomerate

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

Greenish-gray quartz-rich rock, possibly weathered granite or quartzite

Provisional identification: quartz–feldspar aggregate; exact species cannot be confirmed from one photograph

Sandstone (with concrete/human-made layer)

Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)

Breccia

Breccia - Clastic sedimentary rock

Conglomerate (River Rock Aggregate)

Conglomerate (Lithic-clast conglomerate)

Conglomerate

Conglomerate (a clastic sedimentary rock)

Quartz-rich breccia or conglomerate

Siliciclastic conglomerate/breccia, predominantly quartz and feldspar clasts in a rusty iron-oxide cement

Conglomerate

Conglomerate Rock

Conglomerate

Conglomerate rock

Conglomerate

Sedimentary Conglomerate

Conglomerate

Conglomerate rock

Conglomerate

Clastic Sedimentary Rock

Weathered iron-rich sandstone or ferruginous quartzite

Ferruginous sandstone; possibly hematite/goethite-cemented quartzite

Unidentified orange-brown rock fragment

Likely weathered iron-rich volcanic rock or ochre-bearing material; exact identification is impossible from the blurred image

Conglomerate

Clastic Sedimentary Conglomerate (SiO2 based clasts in matrix)

Conglomerate

Polymictic Conglomerate

Conglomerate

Clastic Sedimentary Conglomerate (SiO2 primarily)

Sandstone

Clastic Sedimentary Rock

Weathered quartz-rich sandstone or granitic rock

Indeterminate; likely iron-stained quartz sandstone, possibly weathered granite

Pink granite (probable)

Granite; primarily quartz, potassium feldspar, plagioclase, and minor mica

Rounded reddish-brown pebble

Likely ferruginous sandstone or iron-rich quartzite; exact identification requires a fresh surface and tests

Tumbled tan stone, possibly sandstone or weathered limestone

Indeterminate; likely quartz-rich sandstone or calcitic limestone

River Rock / Stream Pebble

Fluvial Clast / Rounded Sedimentary Particle

Conglomerate Pebble (with Chert / Quartz)

Sedimentary Conglomerate / Breccia Pebble

Conglomerate with Quartz Inclusions

Conglomerate (clastic sedimentary rock) with internal Quartz (SiO2)

Weathered quartz-bearing rock, possibly sandstone or quartzite

Provisional: quartzite (mostly SiO₂); could alternatively be iron-stained quartz sandstone