Journal of Geological Research / 2013 / Article / Fig 8

Research Article

Multiscale Erosion Surfaces of the Organic-Rich Barnett Shale, Fort Worth Basin, USA

Figure 8

(a) Core photo shows sharp erosional contact at the topmost part of clay-rich mudstone facies. (b) Core photo shows multiple occurrence of erosional surfaces within less than one foot. (c) Thin section photo shows erosional surface and its related features indicated relatively proximal, shallow, and high energy muddy depositional setting (note the lower irregular contact (white dashed line), the pebbly-size reworked shale intraclasts, and reworked shell fragment). (d) Thin section photo shows erosional surface and its related features indicated relatively distal, deep, and low energy muddy depositional settings (note the lower sharp contact (white dashed line) and shale rip-up clasts).
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