Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Category
Organic (Sedimentary Context)
Browse organic (sedimentary context) specimens identified by the Rock Identifier community.
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Fossiliferous Shale
Carbonaceous Shale (with potential plant/aquatic fossils)
sedimentary
Ammonite fossil
Ammonoidea (likely an involute ammonite; exact genus requires preparation and context)
fossil
Black Limestone
Bituminous Limestone (Calcium Carbonate - CaCO3)
sedimentary
Green Chalcedony (Batu Akik)
Silicon Dioxide (SiO2)
gemstone
Likely bituminous coal
Coal, predominantly carbon-rich organic matter; exact rank cannot be confirmed from the image
sedimentary
Chert (Agatized/Chalcedony variety)
Microcrystalline Quartz (SiO2)
sedimentary
Ironstone concretion / Limonitic Sandstone
Goethite/Hematite Cemented Sandstone (Hydrated Iron Oxide)
sedimentary
Fossiliferous Sandstone
Sedimentary rock containing invertebrate fossils
fossil
Chert (Green Fossilized Algae or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Chert (Jasper/Chalcedony mix)
Microcrystalline Quartz (SiO2)
sedimentary
Likely bituminous coal
Coal, predominantly carbon-rich organic matter with variable maceral and mineral content
sedimentary
Coal (most likely Bituminous or Anthracite)
Coal (organic sedimentary rock)
Sedimentary
Sea Shell (Mollusk Shell)
Calcium Carbonate (Aragonite/Calcite)
fossil
Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Likely bituminous coal
Coal, predominantly carbon-rich organic matter; exact rank cannot be confirmed visually
sedimentary
Coal (likely Bituminous or Lignite)
Organic Sedimentary Rock (Carbonaceous)
sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite in Shale
Iron Disulfide (FeS2)
mineral
Amber (Copal)
Fossilized Tree Resin
mineraloid
Unidentifiable Rock Fragment
Uncertain
Chert (often called Flint in archaeological contexts)
Microcrystalline or cryptocrystalline Silica (SiO2)
sedimentary
Amber (Copal)
Succinate (Fossilized Tree Resin)
mineraloid
Shale
Laminated Fissile Pelite
sedimentary
Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)
Calcite
Mineral
Weathered Sedimentary Rock
Sedimentary Rock
Sedimentary
Limonite (Hydrated Iron Oxide / Bog Iron)
FeO(OH)·nH2O
Mineral (Sedimentary context)
Limestone (specifically Bituminous or Carbonaceous Limestone)
Calcium Carbonate (CaCO3) with Organic Impurities
sedimentary
Fossil-bearing Sedimentary Rock
Sedimentum cum fossili
fossil
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Fossiliferous Limestone with Rugose Coral
Calcite (CaCO3) matrix containing Rugosa (order of extinct solitary and colonial corals)
sedimentary
Limestone pebble
Sedimentary rock, primarily calcium carbonate (CaCO3)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Shale
Mudstone (composed primarily of clay minerals like kaolinite, illite, and smectite, with quartz and calcite)
sedimentary
Shale
Shale (Fine-grained clastic sedimentary rock)
sedimentary
Mother of Pearl (Nacre) / Shell Fragment
Biogenic Calcium Carbonate (Aragonite and Conchiolin)
fossil
Limestone Pebble with Crinoid Fossil
Calcium Carbonate (CaCO3) - Fossiliferous Limestone
sedimentary
Fossilized Bone
Petrified Bone / Biogenic Sedimentary
fossil