Fig. 2.

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Schematic representation of expected gas flow at different orientations of bedding planes: parallel to flow (top) and orthogonal to flow (bottom). Dashed thin lines represent bedding planes. Solid lines depict the volume occupied by gas: apertures larger than 40 μm and detected by μ-CT (in red); and apertures between 2 and 40 μm detected by MIP but not by μ-CT (in blue) [12].

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