Wenlock Quarry, also known as Edgefield Quarry, cuts through the wooded escarpment near Much Wenlock. Its Silurian limestone and ballstone buildups preserve corals, brachiopods, crinoids and bryozoans. The old workings offer an unusually clear view of changing limestone facies, but steep approaches and overhanging faces require a cautious visit.
FIND FREQUENCY: ♦♦♦ – Fossil-bearing limestone is well documented, particularly corals, brachiopods, crinoids and bryozoans. Visibility depends on vegetation and weathering.
CHILDREN: ♦♦ – The surrounding walk can suit supervised families; steep quarry access, unstable slopes and overhanging faces are unsuitable places for children to explore.
ACCESS: ♦♦ – An uphill walk from the Much Wenlock National Trust car park, with rough ground, steps and stiles. Quarry entry is not an accessible extension of the walking route.
TYPE: – Disused limestone quarry with separate faces, wooded floor and carbonate buildup exposures. Obtain site-specific permission before removing fossils.
DIRECTIONS
♦ From Much Wenlock follow the A458, then take the B4371 towards Church Stretton. Use the Much Wenlock National Trust car park on the right, not the separate Presthope starting point. The National Trust’s Jenny Wind walk gives the car-park grid reference SO 613 996.
♦ The original approach leaves the back of the car park by a small gate and steps, crosses a stile and climbs the field towards Harley Bank. Continue past Stokes Barn on the left and enter the wood through the gate to reach the old quarry. Expect a sustained climb, steps and stiles; consult current waymarks and the National Trust route map where arrangements differ.
♦ This guide concerns Edgefield Quarry, recorded around SJ 608 000, with workings extending along the wooded gorge. The previous guide coordinate, 52.57394°N, 2.61817°W, lies near Presthope roughly 3.7 km to the south-west and should not be used to locate this quarry.
♦ The official Jenny Wind walk provides current walking-route context around the former workings and Stokes Barn. Its town satnav postcode is not a verified quarry-entrance postcode. Stay on permitted paths, follow signs and view exposed rock from stable ground without approaching the bases of overhanging faces.
FOSSIL HUNTING
Edgefield exposes fossil-rich Much Wenlock Limestone in several contrasting forms. The original guide reports corals, brachiopods, crinoids and bryozoans, historically called “polyzoa”, as common. The geological site record independently describes compound corals, small brachiopods and bryozoans in fallen fragments, together with coarse, crinoidal limestone. These are broad fossil groups rather than a verified species list for every face.
Begin with naturally weathered surfaces visible from safe ground. Crinoid debris can form much of the limestone: look for small circular or star-like columnal sections and short stacks of disc-shaped stem pieces. A rock crowded with such fragments records disarticulated skeletal debris rather than necessarily containing a complete sea lily. Grainy crystalline calcite and broken crinoid fragments can resemble one another until their repeated shapes become clear under a hand lens.
Compound corals show repeated corallites within a larger colony. Look for an organised pattern across several adjacent chambers rather than treating any honeycomb-like weathering as a firm identification. Bryozoans may occur as branching, net-like or encrusting skeletal material; worn pieces can be difficult to distinguish from other colonial organisms. Do not transfer familiar coral or bryozoan species names from Dudley or another Wenlock quarry to these specimens without diagnostic evidence.
Brachiopods are often small and may be seen as valves, ribbed surfaces or shell sections in the limestone. Their preservation depends on whether a rock surface cuts through the shell or exposes its exterior. The original guide also mentions cephalopods, trilobites and worm tubes, but without species identifications, specimen vouchers or precise bed assignments. Treat those as additional historical observations, not a guarantee that they occur in every accessible fragment.
The old visitor account divides the workings into a main quarry, a second large area, and a path continuing along an embankment to a viewpoint and terminal fossiliferous face. This is useful orientation for a large, overgrown site, but it is not a measured three-bed sequence. The geological site survey separately records a pathside nodular face, a lateral transition to bedded crinoidal limestone, and ballstone-bearing faces farther along the gorge. No exact one-to-one mapping between the two descriptions has been established.
The contrast between nodular, regularly bedded and ballstone limestone is worth recording even when no loose specimen is taken. Photograph fossils together with their enclosing rock, include a scale and note which safely observed face or floor area they came from. Fossils preserved in a buildup and broken skeletal material between buildups answer different questions about the ancient seabed; an unlabelled mixed collection loses that relationship.
Do not hammer the face, work beneath overhangs or climb unstable scree to reach apparently fresh fossils. National Trust walking and fossil-looking information does not by itself grant removal or excavation rights. If the land manager specifically allows a loose specimen to be taken, choose a small naturally detached piece, keep its exact locality information and protect delicate projecting shells. Leave a potentially important find undisturbed and seek specialist advice.
Significant discoveries, geological research and conservation milestones at Wenlock Quarry.
1801 – Telford opens Edgefield Quarry
Thomas Telford opened the limestone quarry that breaches the line of Wenlock Edge. Limestone was carried down Harley Bank by the Jenny Wind inclined plane to the Red House limekilns, creating the industrial exposures through which the local carbonate facies can be studied. A later field account instead associates 1802 with the inclined tramway and says quarrying preceded it; the exact construction sequence is not settled by these descriptions.
1822 – Shepard operates the quarry and inclined plane
The Leighton ironmaster Shepard became operator of the quarry, inclined plane and Red House kilns. Limestone supplied flux for the Leighton ironworks; the surviving documentary terms record rents, a tonnage royalty and weighing requirements.
1833 – Quarrying remains documented
The surviving documentary record indicates that Edgefield was still being worked. This is evidence of continued extraction, not a newly established opening or closure date.
1838 – Edward Griffith works the quarry
Edward Griffith, a limemaker from nearby Homer, was recorded working Edgefield. The entry is a dated phase in this quarry’s history and should not be merged with the different working history of Knowle Quarry.
By 1882 – The quarry is mapped as disused
The six-inch Ordnance Survey map showed the quarry in disuse by 1882. The workings left conspicuous ballstone faces; the map establishes a latest documented status, not an exact year of closure.
2007 – The Edgefield clay cleft is illustrated
Charles Hiscock published a field account with an Edgefield photograph labelled as a bentonite cleft. It records the local field interpretation; it does not establish a geochemical match to a named ash bed or transfer the separately discussed borehole correlations into this quarry.
GEOLOGY
Edgefield Quarry exposes the Much Wenlock Limestone Formation of Homerian age, within the Wenlock Series of the Silurian. The limestone formed in a marine carbonate setting where living communities supplied skeletal material and local buildups created an uneven seabed. Its changing textures make this more than a single uniform limestone face: nodular rock, more regularly bedded crinoidal limestone, clay partings and ballstone masses occur within the old workings.
The pathside face contains nodular limestone with projecting, nearly horizontal slabs. Farther south-east, the rock changes laterally into more regularly bedded limestone with clay partings, often coarse and rich in crinoid debris. This lateral change matters: the different rock types should not be arranged automatically as successive formations simply because a visitor encounters them in order along the path.
At the farther face, ballstone masses occur among nodular and flaggy limestone. “Ballstone” is a traditional quarry and field term for relatively unbedded carbonate buildup facies, not a formal member established at this site. Thin beds overlie and dip away from a mound, recording the relationship between the buildup and surrounding sediment. Relief around the mound and differential compaction help explain such bedding patterns; they are not automatically evidence of tectonic folding.
Clay entered the carbonate environment between episodes of limestone accumulation. A recess about 2 m above the base of one face marks a clay layer described by the geological site record as possibly bentonite. Bentonite can represent altered volcanic ash, but that origin is tentative here. No verified analysis or correlation allows this recess to be labelled as a particular named regional ash bed.
The quarry faces are approximately 8 m and 10 m high at the recorded positions, and the gorge extends for about 200 m. These are dimensions of separate exposures, not a complete formation thickness. The former guide also mentioned the Ordovician Harnage Shales, but no exact-site evidence establishes that unit within these quarry faces. Nearby sections and regional type localities have their own geological records and should remain separate.
Detailed geology of Edgefield Quarry: separate faces, facies and tentative clay marker.
Exact locality and exposure scope. This is Edgefield Quarry near Stokes Barn, the quarry crossed by the original Much Wenlock approach. It is distinct from the Presthope, Knowle and Lea route described in the separate Wenlock Edge guide. The dimensions below concern individual faces and the quarry gorge; no complete measured formation log has been established.
Much Wenlock Limestone Formation
Age, terminology and regional limits. The formation is Homerian, Wenlock Series, Silurian. BGS describes pale grey nodular to thinly bedded limestone with reef bodies. No formal local Group or Member subdivision is demonstrated for these faces. Regional formation thicknesses, the Harley Hill basal section, Dudley member names and nearby Harnage or Farley sections must not be presented as the Edgefield succession.
Pathside nodular limestone face, approximately 8 m high. The geological site record describes a prominent face beside the footpath, with nodular limestone and projecting, near-horizontal slabs. The 8 m value is exposed face height, not a measured thickness of a separately named member. Slab overhangs and broken rock limit safe close access.
South-easterly transition to bedded, crinoidal limestone. Along the quarry, the nodular facies changes laterally into more regularly bedded limestone with clay partings. The limestone is coarsely crystalline and commonly crinoidal; fallen fragments yielded compound corals, small brachiopods and bryozoans. The description supports a lateral facies relationship, not an automatic younger-over-older succession.
Gorge continuation, approximately 200 m. Quarry exposure follows the gorge across the escarpment for about 200 m. This is an along-site distance, not a sedimentary thickness. The original guide’s main area, second large area and embankment path to a terminal face are a separate visitor description; no precise correspondence to each surveyed face is proved.
Far face, approximately 10 m high: ballstone and surrounding beds. At the far end, ballstone masses are interbedded with nodular and flaggy limestone. Ballstone denotes the relatively unbedded carbonate buildup facies here, rather than a formal member. The recorded height is that of the face; it does not provide a complete Much Wenlock Limestone thickness.
Thin beds over and beside the mound. Thin limestone beds overlie and dip off the ballstone mound. They preserve the relation between local buildup relief and adjacent bedded sediment. Differential compaction and deposition around an uneven carbonate surface offer the relevant interpretation; the geometry must not be relabelled as a tectonic fold without evidence.
Clay recess about 2 m above the face base: possible bentonite. A recess at this height marks a clay layer described as possibly bentonite. The 2 m figure is its position within that face, not its thickness. An altered volcanic-ash origin remains tentative, and neither mineralogical confirmation nor correlation with a named ash bed has been established. Large limestone slabs overhang the top of the face. Charles Hiscock’s 2007 field report illustrates an Edgefield cleft captioned as bentonite, supporting that field interpretation but not a mineralogically proved or regionally correlated ash bed. The bentonite study it cites concerns Lower Hill Farm and Eastnor Park boreholes, not this quarry.
Fossil records and depositional interpretation. Compound corals, brachiopods, bryozoans and crinoidal material are documented in the site description. The old guide additionally reports cephalopods, trilobites and worm tubes without species or bed determinations. Warm, shallow marine carbonate production and the accumulation of broken skeletal debris provide regional environmental context for the local facies. Specific stromatoporoid species, reef dimensions or a named faunal assemblage from another quarry are not inferred here.
Quarry-history uncertainty. The National Trust heritage record dates Telford’s opening of Edgefield to 1801. Hiscock’s 2007 account describes working before 1802 and associates that year with the inclined tramway. These descriptions should not be forced into a single precisely dated construction sequence; neither changes the observed geological relationships.
References. Shropshire Geological Society, Edgefield Quarry RIGS0807 site record; British Geological Survey, Lexicon WEL; Aldridge and colleagues (2000), British Silurian Stratigraphy, Geological Conservation Review volume 19, Wenlock chapter, for explicitly regional context; National Trust heritage record MNA142367; original UK Fossils Wenlock Quarry account. Hiscock, C. (2007), “On the Edge”, Journal of the Bath Geological Society, 26, pp. 3–6, particularly the Edgefield photograph 10 on p. 6.
SAFETY
The original account and geological site record both describe overhanging limestone, including large slabs at the top of a face. Keep away from cliff bases and undercuts, and do not climb the faces or disturb supporting rock. A hard hat does not make an unstable face safe.
The approach is steep in places and the pit entrance can be slippery after rain. Use established paths, wear footwear with good grip and avoid descents that need improvised ropes or scrambling. Turn back if vegetation, mud or damage prevents a safe route.
Keep children under close supervision on the surrounding walk and away from quarry edges, slopes and faces. Be alert to loose stones, concealed drops and changing woodland conditions. Current signs and any access restrictions take priority over the old photographs and route description.
EQUIPMENT
A hand lens, camera, scale and notebook are the most useful tools for this visit. Take a current route map, sturdy walking boots and clothing suitable for rough woodland terrain. Observation does not require a hammer or chisel.
If you have specific permission to remove a naturally loose piece, carry soft wrapping and a rigid box, with separate labels for each finding place. Limestone may be robust, but projecting coral, bryozoan and shell structures are easily broken.
CLEANING AND TREATING
For a legitimately collected loose specimen, start with a close examination under magnification and minimal dry brushing. Preserve the surrounding limestone and any delicate projecting shell or colonial structure until you understand how the fossil sits in the matrix.
Fossil and matrix can both be calcitic, so acids may damage the evidence you want to reveal. Avoid household acids, bleach, varnish and forceful splitting. Detailed mechanical preparation is best undertaken carefully by someone experienced with this limestone; leave a potentially important specimen unprepared for advice.
IDENTIFY YOUR FINDS
Need help identifying a fossil? Share clear photos, where you found it and its size with the community.
FURTHER READING
National Trust: Edgefield Quarry heritage record and working history
Shropshire Geological Society: geological site register, Edgefield Quarry RIGS0807
British Geological Survey: Much Wenlock Limestone Formation
National Trust: Jenny Wind walking route
Natural England: Wenlock Edge SSSI citation
ACCESS RIGHTS
The National Trust’s current visitor and Jenny Wind route pages describe walking access around Wenlock Edge and the former quarry landscape. They do not establish unrestricted fossil removal, hammering or excavation at Edgefield. Obtain permission for the exact activity and place before disturbing material.
Wenlock Edge SSSI protects important geological and biological features, but a single quarry label or approximate grid point cannot establish every boundary. Current official mapping places the southern geological-record endpoint inside the SSSI and the northern endpoint and National Trust record point outside. Treat the quarry as a boundary-sensitive locality, consult the land manager and do not infer collecting rights from either a public path or a point outside the designation.
Leave faces, clay layers and carbonate buildups intact, respect fences and signs, and avoid unstable ground. The historical quarrying record and a recent group-visit report describe the site; neither is a current permission or assurance that every part of the quarry is safe to enter.
It is important to follow our ‘Code of Conduct’ when collecting fossils or visiting any site. Please also read our ‘Terms and Conditions‘
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