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

Figure 4

(a) Core photo shows highly compacted shelly laminae (arrows) with lower sharp contact and upper gradational contact. (b) Thin section photo shows lower sharp contact with overlying shelly laminae. (c) Thin section photo shows the shell fragments with calcite filling. (d) Thin section photo shows multiple shelly laminae. (e) Core photo shows shale rip-up clasts with lower and upper sharp contacts. (f) Thin section photo shows scattered shale rip-up clasts (white arrows), note the pyrite filling of some shale rip-up caslt (black arrow). (g) Thin section photo shows rounded to subrounded shale rip-up clasts with lower gradational contact and upper sharp contact.

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