Sedimentary Rock (Possibly A Conglomerate Or Coarse Grained Sandstone)

Gabbro (likely with Pyrite/Sulfide mineralization)

Mafic Intrusive Igneous Rock

Conglomerate

Conglomerate rock

Iron-rich sandstone or weathered ironstone fragment

Ferruginous sandstone; chiefly quartz (SiO₂) cemented or stained by iron oxides such as hematite/goethite

Gneiss

High-grade regional metamorphic rock

Diorite (possibly Orbicular Diorite or Porphyritic Diorite)

Intermediate Phaneritic Igneous Rock

Banded gneiss (likely biotite-rich gneiss)

Gneiss; chiefly quartz, feldspar, biotite, and possibly hornblende

Weathered limestone

Calcite-rich carbonate rock (mostly CaCO₃), possibly fossiliferous limestone

Conglomerate

Clastic sedimentary rock (Polymict conglomerate with quartz/calcite matrix)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Banded Sandstone

Quartz-rich Arenite Sandstone

Conglomerate

Conglomerate (SiO2, CaCO3 dominant)

Chert or flint nodule/fragment

Microcrystalline quartz (SiO₂), commonly with chalcedony

Breccia

Clastic Breccia (SiO2/CaCO3 dominated)

Tumbled reddish-brown pebble, likely sandstone or iron-rich quartzite

Probable ferruginous sandstone (quartz-rich; SiO₂ with iron oxides), possibly quartzite

Sandstone (Iron-stained)

Arenite with Limonite/Hematite staining

Sandstone or Mudstone

Sedimentary Rock

Weathered brown sandstone or quartzite cobble

Indeterminate sandstone; possibly quartz-rich quartzite

Granite Gneiss

Metamorphic Rock (Quartz, Potassium Feldspar, Plagioclase, Biotite/Amphibole)

Quartzite / Sandstone

SiO2 (Silicon Dioxide)

Rounded gray pebble, possibly limestone or quartzite

Uncertain; likely micritic limestone (calcite, CaCO₃) or fine-grained quartzite (quartz, SiO₂)

Quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly crystalline SiO₂, possibly with mica or feldspar

Tumbled brown mineral pebble, possibly jasper or weathered quartzite

Indeterminate from the blurred image; likely microcrystalline quartz (SiO₂) if jasper, or quartzite dominated by quartz

Coarse Sandstone

Arenite (SiO2 based)

Conglomerate

Polymictic Conglomerate

Weathered sandstone or iron-rich sedimentary fragment

Quartz-rich sandstone, possibly ferruginous sandstone (SiO₂-dominant)

Shale (possibly)

Shale (fine-grained clastic sedimentary rock)

Gneiss

Gneiss (foliated metamorphic rock)

Quartz Pebble (Quartzite Pebble)

Silicon Dioxide (SiO2)

Chert Breccia

Brecciated Chert (Sedimentary Rock)

Breccia

Clastic Breccia (General mineral composition depends on fragments, often SiO2 or CaCO3)

Dark mafic igneous rock, likely basalt or gabbro

Basaltic rock composed chiefly of plagioclase feldspar and pyroxene, with possible olivine and iron-oxide minerals

Banded Gneiss

Gneiss (SiO2-rich metamorphic rock)

Coarse-grained Granite

Granitoid (Felsic Plutonic Rock)

Likely quartz-rich metamorphic rock (quartzite or milky quartz)

Quartzite; predominantly quartz (SiO₂), possibly with feldspar and iron-oxide staining

Conglomerate (River Rock)

Clastic sedimentary rock (primarily SiO2)

Granite or Pegmatite with Quartz and Feldspar

Granitoid

Likely tumbled sandstone or limestone

Quartz-rich sandstone (possibly calcarenite/limestone)

Rounded gray river cobble

Likely fine-grained sandstone, siltstone, or metamorphosed equivalent; exact identification requires a fresh surface and tests

Breccia

Breccia

Ferruginous Sandstone (Ironstone Conglomerate fragments)

Ferruginous clastic sedimentary rock (SiO2 cemented by Fe2O3)

Quartzite (or Quartz Rich Conglomerate)

Quartzite (SiO2 silicon dioxide)

Puddingstone (Gowganda Conglomerate)

Polymictic Conglomerate (SiO2 matrix with jasper and quartz inclusions)