Lindgreen (1985) concluded that carbonate-rich bands within Upper Jurassic Kimmeridgian claystones from the Central graben area of the North Sea were the result of a late-stage post-compactional fracturing process in a homogeneous claystone. Lindgreen (1985) based these conclusions on the following evidence: (1) the similarity of mineralogy between the host claystone and the carbonate bands, (2) the similarity of grain-size distribution between the claystone and the carbonate bands, (3) the similarity between the surface properties of the claystone and the noncarbonate fraction of the carbonate bands, (4) the presence of claystone fragments in the carbonate bands, and (5) the occurrence...

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