Correlation of the Much Wenlock Limestone Formation across the West Midlands. Within the West Midlands are the following systems tracts and their bounding surfaces: SB/TS – sequence boundary and combined transgressive surface; ETST – early transgressive systems tract; SMSS – surface of maximum sediment starvation; LTST – late transgressive systems tract; MFS – maximum flooding surface; HST – highstand systems tract; SFR – surface of forced regression; FSST – falling stage systems tract. As explained in the text, the lower sequence boundary is taken at a slightly higher level than before, and the upper sequence boundary is taken at a slightly lower level (see Ray & Thomas, 2007, p. 199, fig. 2).
Outcrops of the late Wenlock Series. (a–c) Wren's Nest Hill (SO 937 920). (a) The NCC cutting exposing the marked lithological transition between the Lower Quarried Limestone and Nodular Beds members (PS3–6); (b) hilltop section above the Fossil Trench exposing the Nodular Beds Member, note the reefal limestone bands separated by a prominent flooding surface (PS7/8); (c) the Snake-pit Quarry, Wren's Nest Hill, exposing the flooding surfaces between PS10, PS11 and PS12, which includes the boundary between the Much Wenlock Limestone formation and the Lower Elton formations (scale on field notebook 15 cm).
Correlation of the Farley Member of the Coalbrookdale Formation, Much Wenlock Limestone Formation and basal Lower Elton Formation between Harley Hill and Lincoln Hill, Wenlock Edge. For legend see Figure 2.
Correlation of the Farley Member of the Coalbrookdale Formation, Much Wenlock Limestone Formation and basal Lower Elton Formation between Presthope Tunnel and Coates Quarry, Wenlock Edge. For legend see Figure 2.
Correlation of the Farley Member of the Coalbrookdale Formation and Much Wenlock Limestone Formation between the reef and off-reef tracts, Wenlock Edge. The log showing the typical reef tract succession (southwest of Much Wenlock) includes the identified systems tracts and their bounding surfaces, as well as an estimate of water depth relative to storm and fair-weather wave base. For details of abbreviations, see Figure 2 caption. For legend see Figure 2.
Outcrops of the late Wenlock Series. (a–c) the Farley road cutting (SJ 637 026); (a) boundary between the Farley Member and Much Wenlock Limestone Formation (MWLF) just below bench cut back into the hillside; note the flooding surfaces exposed as prominent notches (height of road cutting is approximately 30 m); (b) typical Farley Member flooding surface (tfs, PS0/1); (c) prominent flooding surface (pfs) overlain by limestone and pyrite nodules (PS6/7) within the basal Much Wenlock Limestone Formation (hammer length 28 cm).
Outcrops of the late Wenlock Series. (a, b) Farley Quarry (SJ 630 015). (a) Upward-coarsening sequence (PS10) within the Much Wenlock Limestone Formation; note the prominent grainstone (pgs) band near the top of the section (height of cliff is approximately 12 m); (b) prominent grainstone (pgs) band at the top of PS10 overlain by small reefs and limestones interbedded with silty mudstones (PS11/Lower Elton Formation). The reefs are in turn overlain by the increasingly nodular limestones marking PS12 (length of field notebook is 20 cm).
The correlation of lithofacies, depositional sequences and associated surfaces, graptolite biozones, radiometric ages, sea-level and δ13C isotopic curves within the late Wenlock Series between the West Midlands and Wenlock Edge. δ13C isotopic curve for the West Midlands is taken from Corfield et al. (1992), but has been modified to account for the non-exposure of the uppermost Nodular Beds Member in quarries on the eastern side of Wren's Nest Hill. The positions of age-diagnostic graptolites are taken from Butler (1939), Bassett (1974) and Bassett et al. (1975) and the graptolite biozones are after Bassett et al. (1975). Radiometric ages are taken from Ross et al. (1982). MWLF – Much Wenlock Limestone Formation; LQLM – Lower Quarried Limestone Member; UQLM – Upper Quarried Limestone Member.