Journal of Geological Research / 2013 / Article / Fig 5

Research Article

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

Figure 5

(a) Core photo shows reworked concretion (white arrows) associated with erosion surface with lower irregular contact and upper gradational contact. (b) Thin section photo shows large, transported subrounded concretions. (c) Thin section photo shows elongate, reworked concretions associated with irregular sharp erosional surface. (d) Thin section photo shows sandy-size reworked concretions. (e) Thin section photo shows reworked concretion with several core (white arrows) that rimmed with pyrite.

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