Cone-in-cone structure (Limestone)
Cone-in-cone structure (Secondary Sedimentary Structure)
sedimentary
Category
Mineralized Fossil
Browse mineralized fossil specimens identified by the Rock Identifier community.
Learn about Mineralized Fossil in the encyclopedia
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Sandstone or Weathered Conglomerate
Sedimentary Rock (Quartzose Sandstone / Lithic Arenite)
sedimentary
Sandstone (Calcareous/Lithic)
Sedimentary Rock (Clastic Sandstone with Calcium Carbonate cement)
sedimentary
Fossilized Shark Tooth
Carcharocles or Otodus sp. (Micro-fossilized)
sedimentary
Dendritic Quartz
Silicon Dioxide (SiO2) with Manganese Oxide inclusions
mineral
Fossiliferous Limestone
Fossiliferous Limestone
sedimentary
Crinoidal Limestone
Bioclastic Limestone
Sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Petrified Wood
Silicified wood (Quartz, Chalcedony, or Opal)
sedimentary
Fossil Assortment and Geological Specimens
Various (including Ammonoidea)
fossil
Sandstone
Arenite
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone Pebbles
Arenite
sedimentary
Sandstone
Arenite
sedimentary
Brachiopod Fossil
Phylum Brachiopoda (likely Order Rhynchonellida or Spiriferida)
fossil
Fossil Coral
Cnidaria Anthozoa (Fossilized)
sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock (primarily CaCO3)
sedimentary
Shark Tooth Fossil
Otodus obliquus (or similar prehistoric lamniform shark tooth)
fossil
Weathered brown stone, likely basalt or iron-stained volcanic rock
Indeterminate; possibly vesicular basalt (mafic silicate rock)
igneous
Yellow Jasper with Dendritic Inclusions
Silicon Dioxide (SiO2) with Manganese/Iron Oxide inclusions
sedimentary
Dinosaur Bone (Gembone)
Agatized Dinosaur Bone (Silicified Paleo-osteoid)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (primarily Quartz/SiO2)
fossil
Seashell Fossil
Invertebrate fossil (phylum Mollusca)
fossil
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Sandstone (with Iron Staining)
Arenite
sedimentary
Sandstone
Arenite (SiO2 principal component)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Shale with Quartz Veins
Fissile Sedimentary Rock (SiO2)
sedimentary
Limestone with Gastropod Fossil
Sedimentary Calcium Carbonate (CaCO3) with Gastropoda inclusion
fossil
Fossil Coral
Scleractinia (Stony Coral) fossil
fossil
Fossilized Coral / Fossiliferous Limestone
Anthozoa fossil in Limestone (CaCO3)
fossil
Fossiliferous Limestone with Rugose Coral
Lithostrotionella (Limestone Matrix - CaCO3)
sedimentary
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Limestone with Stylolites
Calcareous sedimentary rock (CaCO3)
sedimentary
Fossil Coral
Scleractinia or Anthozoa (Fossilized)
fossil
Petrified Wood
Silicified wood (primarily Quartz, SiO2)
fossil
Fossilized Coral (Petrified Coral)
Lithostrotionella (example genus) / Scleractinia
fossil
Sandstone with Brachiopod Mold Fossil
Sedimentary rock (Sandstone) with indeterminate Brachiopod mold
fossil
Turritella Agate (Fossiliferous Chert)
Silicified Elimia tenera (Fossiliferous Chalcedony)
sedimentary
Concretion
Sedimentary Concretion
sedimentary