Sedimentary rock - Silica, Clastic, Chemical

sedimentary rock

Table of Contents

Introduction
Classification systems
- Terrigenous clastic rocks
- Carbonate rocks: limestones and dolomites
- Noncarbonate chemical sedimentary rocks
Properties of sedimentary rocks
- Texture
  - Grain size
  - Particle shape
  - Fabric
- Mineralogical and geochemical composition
Sedimentary structures
- External stratification
- Bedding types and bedding-plane features
  - Types
  - Bedding-plane features
- Deformation structures
Sedimentary environments
Sedimentary rock types
- Conglomerates and breccias
  - Classification schemes
  - Epiclastic conglomerates and breccias
    - Clast-supported conglomerates
    - Matrix-supported conglomerates
- Sandstones
  - Sandstone components and colour
  - Formation of sandstones today
  - Bedding structure
  - Texture
  - Classification of sandstones
    - Quartz arenites
    - Arkosic sandstones
    - Lithic arenites
    - Wackes
- Mudrocks
  - General properties of shales
  - Origin of shales
  - Shales of economic value
- Limestones and dolomites
  - Mineralogy
  - Textural components
  - Origin of limestones
  - Dolomites and dolomitization
- Siliceous rocks
  - Types of cherts
  - Origin of cherts
- Phosphorites
- Evaporites
  - Nonmarine environment
  - Shallow marine environment
  - Deep-basin environment
- Iron-rich sedimentary rocks
  - Origin of banded iron formation
  - Origin of ironstones
- Organic-rich sedimentary deposits
  - Coal
  - Oil shale
  - Oil and natural gas
Secular trends in the sedimentary rock record

References & Edit History Related Topics

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noncarbonate, nonclastic sedimentary rocks

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Those siliceous rocks composed of an exceptionally high amount of crystalline siliceous material, mainly the mineral quartz (especially microcrystalline quartz and fibrous chalcedony) and amorphous opal, are most commonly known as chert. A wide variety of rock names are applied to cherty rocks reflecting their colour (flint is dark chert; jasper is usually red; prase is green) and geographic origin (novaculite of Arkansas, U.S.; silexite of France). The term chert is applied here to all fine-grained siliceous sediments and sedimentary rocks of chemical, biochemical, and organic origin. Two major varieties of chert deposits exist—namely, bedded chert and nodular chert. Bedded ...(100 of 17457 words)

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