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Bedding-parallel fibrous veins are common worldwide in sedimentary basins, especially within strata of low permeability. The term “beef” refers to bedding-parallel veins of fibrous minerals, where the fibres are mutually parallel and have formed quasi-vertically. More complex on a smaller scale are “cone-in-cone” structures, yet these are also common within bedding-parallel veins. For both beef and...
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