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Table 2
Stratigraphy of the channel-fill sequence of Autrecourt (Section 3–6).
| Stratigraphic units (SU) | Description (field and grain-size) | Thickness (in m.) | Sedimentary interpretation (depositional setting) |
|---|---|---|---|
| 336 | Light-grey clay with hydromorphic features | 0.85 | Alluvial plain with overbank fines deposits and pedogenesis (humic horizon and redoxic soil) (FF: floodplain fines sensu Miall, 1996) |
| 335 | Grey clay | ||
| 334 | Dark-grey humic horizon | ||
| 333 a | Grey to greenish-grey clay | ||
| 333 b | Mottled light clay with sandy beds | ||
| 332 | Light-brown peat affected by desiccation cracks topward | 0.3 | Vegetated swamp deposits with Histosol development (3 soils) (CH-FF sensu Miall, 1996) |
| 331 | Dark-brown peat (reworked to the North-East direction) | 0.22 | |
| 330 a | Light-brown peat | 0.12 | |
| 330 b | Dark-grey clay (progressive transition with 330a) | ||
| 329 a | Brown silts, slightly organic (peat) and bioturbated | 0.2 | Vegetated swamp deposits (a) with overbank fines (b) and incipient soil (c) (CH-FF sensu Miall, 1996) |
| 329 b | Grey clayey silts | ||
| 329 c | Mottled clayey silts with root traces | ||
| 328 a&b | Light grey clayey silts with sandy beds | 0.5 | Backswamp to overbank deposits in a channelized area (CH-FF sensu Miall, 1996) |
| 328 c | Light grey clayey silts, slightly sandy | ||
| 328 d | Homogeneous yellowish sands | ||
| 327 | Grey sandy silts and with wood debris | ||
| 326 a | Homogeneous grey sandy silts | ||
| 326 b | Grey Sandy silts | ||
| 341 | Gravelly sands with calcareous granules | 1 min | Lateral accretion macroform and cross-bedded silty sands (Lateral accretion: LA; Sandy bedforms: SB sensu Miall, 1996) |
| 339 | Sandy gravels | ||
| 301 | Cross-bedded polygenic gravels with silty sand beds organized in fining upwards (Clast size: 2–50 mm, sub-rounded clasts, moderately sorted, openwork texture and normal grading) |
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