Fossilized Wood (Petrified Wood)
Silicified Wood (primarily quartz/chalcedony replacing organic matter)
Sedimentary (with some aspects of mineral replacement)
Category
Sedimentary (With Some Aspects Of Mineral Replacement)
Browse sedimentary (with some aspects of mineral replacement) specimens identified by the Rock Identifier community.
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Sandstone (Painted)
Arenite (primarily SiO2)
sedimentary
Wood Jasper
Siliceous sedimentary rock (variety of Chert/Chalcedony)
Sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Fossilized Shell Fragment
Bivalvia or Gastropoda (Class) fragment
fossil
Bivalve Fossil (Clam)
Class Bivalvia (e.g., Exogyra or Gryphaea species)
fossil
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Fossil tooth
Mineralized vertebrate tooth; exact animal and species cannot be determined from the image
fossil
Shark Tooth Fossil
Chondrichthyes (class) fossilized tooth
fossil
Petrified Wood
Silicified wood (SiO2)
fossil
Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Shark Tooth Fossil
Vertebrate fossilized tooth
fossil
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Polished brecciated jasper (likely septarian or iron-rich jasper)
Microcrystalline quartz (chalcedony), SiO₂, with iron oxides and possibly calcite or other rock fragments
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Stromatolite
Laminated biogenic sedimentary structure (Cyanobacteria)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossiliferous shale or mudstone with plant fossils
Carbonaceous mudstone/shale containing fossilized foliage, likely fern or seed-fern impressions
fossil
Pyrite
Iron Sulfide (FeS2)
mineral
Petrified Wood
Silicified Wood (primarily SiO2 - Silicon Dioxide)
mineral
Bivalve Fossil (Clam)
Class Bivalvia (e.g., Mercenaria or similar genus)
fossil
Fossil Shark Tooth
Chondrichthyes tooth fossil
fossil
Chert (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified wood (SiO2 - Silicon Dioxide)
sedimentary
Bivalve Fossil (Clam)
Class Bivalvia (e.g., Mercenaria or similar genus), composed of CaCO3 (Aragonite/Calcite)
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Petrified Wood
Silicon Dioxide (SiO2) permineralized organic matter
sedimentary
Sand Tiger Shark Tooth
Carcharias taurus
fossil
Petrified Wood
Silicified Wood (primarily SiO₂)
sedimentary
Fossilized Shark Tooth
Chondrichthyes (class) fossilized tooth
fossil
Shark Tooth Fossil
Vertebrate fossilized tooth (various genera such as Carcharodon, Otodus, or Negaprion)
fossil
Chert (Jasper)
Silicon dioxide (SiO2)
sedimentary
Chert (Vuggy or Fossilliferous)
Microcrystalline Quartz (SiO2)
sedimentary
Fossilized Shark Tooth (Otodus)
Otodus obliquus
fossil
Iron-stained chert (flint) nodule
Microcrystalline quartz (SiO₂), with iron-oxide staining
sedimentary
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Stromatolite
Biogenic sedimentary structure (Stromatolite)
fossil