A3 and B3

A3 and B3: TIDE-DOMINATED CONGLOMERATIC SHORELINE - UPPER DEVONIAN
Jim Craft
jimhcraft@gmail.com
Introduction
Lithofacies (& interpretations) vary spatially and are dominated by abundant channel-forms/deposits (prograding tide-dominated delta), wave-formed strata mostly at the base (shoreface) followed by parallel-bedding (foreshore/beach), cross-bedding up to 5+ meters inclined shoreward (very large sub-aqueous dunes formed by flood tides). The entire sequence is capped by ∼2m thick channel deposits and in places, a 15-30 cm conglomerate with densely-packed vein-quartz and minor sandstone pebbles/cobbles with abundant plant remains overlain abruptly by wave-formed strata with marine fossils (progradation, major flood event, aburpt rise in relative sea level, transgressive lag deposit and marine transgression).

A3 and B3: TIDE-DOMINATED CONGLOMERATIC SHORELINE - UPPER DEVONIAN

Meeting Place

STOP 1.

STOP 2. The "North Face"
The highest outcrops (+10 m; which includes 3-4 m of marine strata) – shoreface/foreshore/channels; see Figs. 18, 19 & 20)..

STOP 3. NW corner of outcrop

STOP 4.

STOP 5.