Man Made Composite (Lithified Equivalent Of Sedimentary)

Sandstone (Iron-stained)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Fossiliferous limestone

Bioclastic limestone, chiefly calcite (CaCO₃)

Weathered iron-rich limestone or carbonate rock

Calcitic limestone, possibly limonite/goethite-stained; exact identification requires testing

Weathered iron-rich rock, likely shale or slate

Probably ferruginous shale (iron-oxide-stained mudstone); exact identification requires testing

Weathered gray-green rock fragment

Likely shale or mudstone; exact identification requires testing

Jasper

Microcrystalline Quartz (SiO2)

Banded limestone or marble

Likely calcite-rich limestone (CaCO₃), possibly weakly metamorphosed marble

Quartz Sandstone

Quartz Arenite

Rounded sandstone pebble

Sandstone, predominantly quartz with feldspar and iron-oxide cement

Sandstone

Clastic sedimentary rock (primarily SiO2)

Tumbled sandstone pebble

Sandstone, predominantly quartz (SiO₂) with iron-oxide staining

Fossilized leaf or plant impression in shale

Carbonized/impressed plant fossil, likely in fine-grained shale or mudstone; exact taxon indeterminate from the image

Weathered limestone fragment

Calcite-rich limestone, chiefly calcium carbonate (CaCO₃)

Conglomerate

Conglomerate (Clastic sedimentary rock)

Siltstone or Mudstone

Siltstone (composed primarily of silt-sized particles)

Gravelly, weathered sediment (likely glacial till)

Unconsolidated diamicton; mixed lithologies, commonly including quartz, feldspar, and weathered silicate rock fragments

Conglomerate with Fossilized Shark Teeth

Clastic sedimentary rock (Conglomerate) containing Elasmobranchii remains

Exposed aggregate concrete (stone-chip surface)

Portland-cement concrete containing natural aggregate; not a natural rock

Weathered sandstone or quartz-rich metamorphic rock

Likely feldspathic sandstone (lithic arenite); exact identification requires testing

Chert (likely flint)

Microcrystalline quartz, SiO₂

Sandstone

Arenite (with iron oxide cement)

Fossiliferous Limestone

Limestone (CaCO3 - Calcium Carbonate)

Weathered sandstone

Quartz-rich sandstone, likely arkose or feldspathic sandstone

Chert (Jasper Variant likely)

Silicon Dioxide (SiO2)

Common Gravel / Pebble

Lithified rock fragment / Detrital sediment

Sandstone (Red Sandstone)

Arenite (SiO2 based with Fe2O3 staining)

Light-colored limestone (probable fossiliferous or micritic limestone)

Calcite-rich carbonate rock; predominantly CaCO₃ (calcite)

Weathered limestone

Calcite-rich limestone, chiefly calcium carbonate (CaCO₃)

Rounded sandstone cobble

Quartz-rich sandstone, likely arkosic or lithic sandstone

Likely chert or weathered limestone fragment

Microcrystalline quartz (SiO₂) or calcitic limestone (CaCO₃); identification is limited by the blurred image

Grey Chalcedony

Silicon Dioxide (SiO2)

Iron-rich sandstone or weathered ironstone

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

Weathered stone, likely sandstone or altered volcanic rock

Indeterminate; possibly quartz-rich sandstone or weathered tuff

Tumbled tan stone, possibly sandstone or weathered limestone

Indeterminate; likely quartz-rich sandstone or calcitic limestone

Weathered limestone or calcareous concretion

Predominantly calcite (CaCO₃), possibly a fossil-rich limestone fragment

Weathered iron-rich sandstone or ferruginous quartzite

Ferruginous sandstone; possibly hematite/goethite-cemented quartzite

Feldspathic sandstone or arkose

Arkose; chiefly quartz (SiO₂), potassium feldspar (KAlSi₃O₈), and minor lithic grains in a silica/clay cement

Polymict conglomerate with a projecting pebble

Conglomerate; clast-supported polymict conglomerate, dominated by quartz/feldspar and lithic fragments in a cemented matrix

Rounded river pebble, likely weathered quartzite or sandstone

Quartzite (mostly SiO₂), possibly ferruginous sandstone

Mica-rich Sandstone or Micaceous Schist Weathering

Micaceous Schist (Muscovite-Quartz composition)

Conglomerate with iron-rich concretions

Polymictic conglomerate; concretions likely goethite/limonite-rich ironstone

Possible weathered sandstone or iron-rich sedimentary rock

Indeterminate siliciclastic rock; likely quartz-rich sandstone with iron-oxide cement