pressure welding

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The suturing together of grains in a sedimentary rock as the result of pressure dissolution (see pressure solution) taking place along the grain contact. The sutured margin appears as an irregular plane. Pressure welding of grains is particularly common when a mineral cement has developed at a late stage, after deep burial of the sediment, as this results in the main overburden being supported by the grain-to-grain contacts of the sediment.

Subjects: Earth Sciences and Geography.

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