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Keys to the Identification of Sedimentary Rocks

Sed.Home | Alph | Intro | BasicClass | QFLClass | Keys | Depo.Envir | Evol | Evol.Model | Sed.Tect | Self Tests      Want to see an example of a sedimentary rock, and you know its name (or all you know is its name)? This is the place. The specimens vary a lot in their quality. We did not try to find the best, most pristine examples available. Instead we looked for representative specimens, many of which just came out of study trays. Also, many of the images come from outcrops so you can see what the rocks look like in their natural setting.
      And, because many rocks vary widely in their appearance we are, over time, going to add as many different examples of a type as we can find.
     The page is organized by the various classification systems.
   Basic classification - alphabetical (next)
   Basic classification - by method of origin
   QFL classification of clastic rocks
   Carbonate rocks
Basic Classification - Alphabetical Breccia
Chalk limestone
Chert
Coal - bituminous
Coal - anthracite
Conglomerate
Coquina
Dolomite
Fossil limestone
Gypsum
Halite (rock salt)
Intraclastic limestone
Micrite limestone
Oolitic limestone
Peat
Rock Salt (halite)
Sandstone
Shale
Siltstone


Basic Classification - Method of Origin Clastic Breccia
Conglomerate
Sandstone
Shale
Siltstone
Chemical Chert
Dolomite
Gypsum
Halite (rock salt)
Limestone - micrite
Limestone - oolitic
Limestone - intraclastic
Rock Salt (halite)
Biochemical Chalk
Coal - bituminous
Coal - anthracite
Coquina
Limestone - chalk
Limestone - fossiliferous
Peat

QFL Classification Arkose breccia
Arkose conglomerate
Arkose sandstone
Lithic conglomerate
Lithic sandstone
Lithic breccia
Quartz sandstone
Quartz conglomerate
Sandy quartz conglomerate
Sandy wacke
Shale
Siltstone
Wacke sandstone
Wacke quartz conglomerate

Carbonate Classification      Carbonates come in such variety and diversity that only the main types are listed here. Mixed types are forced into one category or another. Also, some rock types are much more common than others and thus some rocks listed below are not represented. We have also mixed rock names from different keys although they may refer to the same thing. Biomicrite
Biosparite
Chalk
Coquina
Dolomite
Encrinite
Fossil limestone
Intramicrite
Intrasparite
Micrite

Oomicrite
Oosparite
Pelmicrite
Pelsparite



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