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mudstone
Book article from: A Dictionary of Earth Sciences
mudstone 1. Argillaceous or clay-bearing sedimentary rock which is non-plastic and has a massive or non-foliated appearance. Compare CLAYSTONE . 2. See LIME MUD ; DUNHAM'S CLASSIFICATION ; and EMBRY AND CLOVAN CLASSIFICATION .
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lime mudstone
Book article from: A Dictionary of Earth Sciences
lime mudstone See DUNHAM CLASSIFICATION .
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debris flow
Book article from: A Dictionary of Earth Sciences
...submarine deep-sea deposits. The deposits are poorly sorted and internally structureless; typically they have a pebbly, mudstone texture . Debris-flow deposits cover many thousands of square kilometres of the abyssal plain after originating on the continental...
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black shale
Book article from: A Dictionary of Earth Sciences
black shale A mudstone with high concentrations of organic material, which is deposited in euxinic environments. Such sediments form important hydrocarbon source rocks .
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multistorey sandbody
Book article from: A Dictionary of Ecology
...sandstone beds, each deposited by the infilling of a river channel, stacked one above the other with little or no intervening mudstone . The multistorey body is formed by the repeated and rapid migration of the channel network over the alluvial plain, so allowing...
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multistory sandbody
Book article from: A Dictionary of Earth Sciences
...sandstone beds, each deposited by the infilling of a river channel , stacked one above the other with little or no intervening mudstone . The multistorey body is formed by the repeated and rapid migration of the channel network over the alluvial plain, so allowing...
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claystone
Book article from: A Dictionary of Earth Sciences
claystone A compacted, non-fissile, finegrained, sedimentary rock composed predominantly of clay-sized (less than 4μm grain size) particles. Compare MUDSTONE .
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pseudonodule
Book article from: A Dictionary of Earth Sciences
pseudonodule A ball-like body of sandstone , with an internal lamination that is convoluted or upcurled at the edges, set in a bed of mudstone . The sand ball is the result of the sinking of sand from the base of an overlying bed into the less dense, soft mud below.
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Embry and Clovan classification
Book article from: A Dictionary of Earth Sciences
...organically bound limestone. E. F. Embry and J. E. Clovan proposed their system in 1971. They retain the Dunham terminology of mudstone, wackestone, packstone, and grainstone for limestones with particles less than 2mm in size, but for limestones containing...
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ball and pillow structure
Book article from: A Dictionary of Earth Sciences
...interbedded with mudstones , and characterized by globular protrusions and isolated pillows of sandstone found in the underlying mudstone. These structures form by the differential settling of the unconsolidated sand into less dense mud below.
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