Sedimentary rock - Shale, Economic Value, Formation

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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Black shales are often of economic importance as sources of petroleum products and metals, and this importance will probably increase in the future. The lacustrine Eocene Green River Shales of Colorado, Wyoming, and Utah are potentially rich petroleum sources and are undergoing exploratory extraction. Bituminous layers of the Early Permian Irati Shales of Brazil are similarly important. These shales contain the remains of the marine reptile Mesosaurus, also found in South Africa, and played a prominent part in the development of the concepts of continental drift. The widespread thin Chattanooga Shale (Devonian-Mississippian) of the eastern United States has been exploited ...(100 of 17457 words)

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