Morphology and Depositional Processes of a Carbonate-Filled Canyon in the Carboniferous KT-II Formation of the Eastern Precaspian Basin, Kazakhstan: Insight from 3D Seismic Data

Figure 7

(a) RMS amplitude map of the CFC. The canyon filling deposits are dominated by low RMS values, while both flanks of the canyon are dominated by high RMS values. A series of small gullies are located in the head segment of the canyon, and two channels are located in the middle and lower segments, with low RMS amplitude values. (b) Coherence map along the canyon bottom. The canyon boundaries, gullies, and channels display dark-coloured coherence patterns, whereas the canyon filling deposits exhibit light-coloured coherence patterns. See the position in Figure 4. (c) Two channels of the carbonate platform in the seismic profile show chaotic weak amplitudes. See the position in (a) (purple dotted line). (d, e) Several gullies of the carbonate platform in the seismic profiles on both sides of the CFC’s head segment show weak amplitudes and chaotic features with concave shapes, which are narrower and shallower than the channels. See the position in (a) (red and blue dotted lines).

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