Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Category
Sedimentary Or Igneous Fragment
Browse sedimentary or igneous fragment specimens identified by the Rock Identifier community.
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Fossilized Shell Impression / Siltstone Fossil
Bivalvia / Brachiopoda mold in Siltstone
fossil
Sandstone
Arenite
sedimentary
Limestone and Quartz Gravel with Petrified Wood
Sedimentary gravel aggregate and fossilized wood
sedimentary
Crushed Granite and Quartz Gravel
Composite Igneous and Silicate Rock Aggregate
igneous
Fossiliferous Limestone containing a Brachiopod or Mollusk Impression
Biogenic Sedimentary Rock / Fossiliferous Limestone
sedimentary
Conglomerate
Conglomerate (SiO2 matrix with various lithic clasts)
sedimentary
Sandstone (likely Graywacke or Siltstone variety)
Clastic Sedimentary Rock (SiO2 with assorted mineral fragments)
sedimentary
Fossiliferous Shale Matrix
Clastic Sedimentary Rock with Brachiopod or Mollusk shell fragments
sedimentary
Fossilized Shark Tooth (Partial) or Coprolite
Elasmobranchii (fossil) or Coprolite (trace fossil)
fossil
Sandstone (likely Graywacke or Arkose)
Clastic Sedimentary Rock (primarily SiO2 with various lithic fragments)
sedimentary
Quartz (Raw and Water-worn)
Silicon Dioxide (SiO2)
mineral
Sandstone (lithic/greywacke variety)
Arenite (composed primarily of SiO2 with various lithic fragments)
sedimentary
Quartz Druzy Geode Fragment
Silicon Dioxide (SiO2)
mineral
Fossiliferous Limestone
Sedimentary Calcium Carbonate (CaCO3) Matrix with Fossil Fragments
fossil
Quartz
Silicon Dioxide (SiO₂)
Mineral
Sandstone
Clastic sedimentary rock
sedimentary
Sandstone (with vugs or solution cavities)
Arenite (primarily Quartz and Feldspar with CaCO3 or SiO2 cement)
sedimentary
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Garnet
Almandine/Pyrope Garnet (X3Y2(SiO4)3)
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
Quartz Druzy (Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Quartz Geode/Druzy Quartz
Quartz (SiO₂)
Mineral
Breccia
Breccia (Sedimentary Clastic Rock)
sedimentary
Fossiliferous Limestone (Crinoidal)
Bioclastic Limestone (predominantly CaCO3)
sedimentary
Sandstone pebble
Sandstone (mainly Quartz, SiO2)
sedimentary
Basalt
Basalt (Mafic volcanic rock)
igneous
Quartz (White Pebble) and Sandstone (Brown/Tan Fragments)
Silicon Dioxide (SiO2) for the white pebble
mineral and sedimentary
Crushed Stone / Gravel (Multiple Rock Types)
Lithic fragments (undifferentiated)
Igneous, Sedimentary, and Metamorphic mix
Pebble
River Pebble / Gravel
sedimentary
Granite Sand and Gravel Mix
Phaneritic Felsic Igneous Plutonic Assemblage
igneous
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Sandstone and Conglomerate pebbles
Sedimentary clastic rock
sedimentary
Brecciated Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Fossiliferous Limestone (with Oyster Fossils)
Fossiliferous Calcarenite / Bivalve Mollusk Fossil
sedimentary
Sandstone (lithic wake or graywacke)
Clastic sedimentary rock (primarily quartz and lithic fragments)
sedimentary
Desert Varnish on Sandstone
Ferromanganese coating on Quartz Arenite
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Bioclastic inclusions
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Sandstone (Quartz-rich)
Arenite (SiO2)
sedimentary
Basalt
Extrusive mafic igneous rock
igneous