• Description. The base of the section is composed of carbonaceous

•shales and poor coals dominated by Podozamites. Podozamites also

•occurs abundantly in ironstone concretions associated with the

•coals and carbonaceous shales. These are overlain by grey/brown

•mudstones also containing abundant fragmented Podozamites

•together with Equisetites, Pityophyllum and probably Ginkgo fragments.

•Up section (down river) grey, weathering to yellow, finegrained

•sandstones become more prevalent with wood fragments

•and impressions of logs. The sands are ripple-marked with sometimes

•two phases of rippling: large ripples asymmetrical, of approximately

•10-cm wavelength within the troughs of which are smaller,

•transverse (ladder) ripples with a wavelength of 1–2 cm. The

•sediments also contain horizontal U-shaped burrows and internal

•moulds of bivalves 4–5 cm long (inoceramids?).

•Interpretation. Going up section the sedimentary environment

•changes from a woody, Podozamites-dominated swamp to a marginal

•marine setting. The two types of ripples may indicate subaerial

•exposure with wind (or draining) ripples formed in the

•flooded troughs of the larger ripples formed by water flow (tidal or

•longshore currents?).