The conspicuous spoil heap at Dalmellington contains Carboniferous Coal Measures rocks, including dark shale with fish teeth, scales and bones. Plant remains and coprolites are also recorded. Mining has mixed the material, so individual finds cannot be assigned to a source bed simply from their position on the tip. Collecting requires permission and particular care around the unstable slopes.
FIND FREQUENCY: ♦♦♦♦♦ – Historically rich in fish and plant remains, especially in suitable shale blocks; the original rating is not a guarantee of present-day finds.
CHILDREN: ♦ – Unsuitable for children because of steep, loose slopes and falling blocks.
ACCESS: ♦♦♦ – A conspicuous roadside landmark, but the original access rating does not establish a safe approach or permission today.
TYPE: Disused mine-spoil heap containing mixed Coal Measures rocks.
DIRECTIONS
♦ From the A713, take the B741 through Dalmellington towards New Cumnock. The large tip lies north of the road near the village. This guide concerns that heap, not the separate mine and spoil heaps farther along the B741.
♦ The original guide approached through the roadside trees and grass near the bridge, where the heap was visible to the north. This description dates from the last recorded inspection in 2008. Agree the approach with the landowner or occupier before visiting; concealed blocks, walls and vegetation can make the old route difficult.
♦ Use lawful parking without obstructing residents, roads or entrances. The former suggestion to park on any side road should not be treated as current parking advice. Do not leave a vehicle on an unsafe verge or walk in the carriageway to reach the heap.
♦ Original locality reference: 55.33182°N, 4.38962°W. This identifies the vicinity of the tip, not a verified parking bay or safe entry point.
FOSSIL HUNTING
The most useful material to recognise is the fine-grained dark shale among the larger, harder blocks of spoil. The original guide records fish teeth, scales, bones and coprolites, together with plant remains and shells. A separate collector account published in 2021 also describes fish-bearing shale and abundant plants at this particular heap. Finds vary from block to block: a plant-rich piece and a fish-rich piece need not have come from the same bed or even the same part of the former workings.
Where collecting is permitted and stable loose material can be reached, begin by examining already exposed surfaces. Pale weathered remains can contrast strongly with the dark matrix, whereas fresh teeth and scales may be glossy black and much less obvious. Turn a small, safely movable piece in oblique daylight and use a hand lens rather than relying on colour alone. Look for consistent edges and surface patterning; a shiny mineral patch is not necessarily a fossil. Photograph interesting features with a scale before attempting any further work.
Most fish material is fragmentary rather than a complete articulated fish. Gary Hoare’s 2021 account reports rhizodont-type remains and tentatively compares smaller ray-finned-fish material with Elonichthys and Mesopoma. These are reported possibilities, not confirmed identifications of the photographs below. Isolated teeth or scales rarely justify a species name without diagnostic detail. The same account reports rare shark teeth and very small amphibian bones; unusual fragments should be kept with their matrix and referred for specialist assessment.
Plant material includes bark-like surfaces, leaves and lycopod remains. The 2021 account mentions Lepidodendron and rooting structures recorded as Stigmaria. Repeated surface markings can make plant impressions easier to recognise than a small isolated fish fragment, but a rooting organ does not establish a particular parent-tree species. The original guide emphasised fish, while the later account found plants very common, so neither should be turned into a fixed abundance ratio for the whole heap.
Coprolites are recorded in the original guide, but lumpy mineral features can resemble them and their producer cannot be inferred simply because fish remains occur nearby. Shells are also a legacy record for this tip, without a verified species list. The account’s bivalves and worm burrows come from a separate Pennyvenie mine farther along the road, not this heap.
Only consider small-scale splitting of a suitable loose shale slab when permission covers it and conditions are safe. Thin splitting can break a fossil or leave an unsupported film; there is no benefit in reducing every slab to fragile flakes. Keep matching part and counterpart together, retain enough matrix to support the remains, and select a few useful specimens rather than breaking large quantities. Never dig into or undercut the heap to search for a supposed fossil band.
Label permitted finds with “Dalmellington Tip”, the collection date, the position within the spoil and the rock type, adding “original horizon unknown”. A photograph of the piece before removal and its surroundings preserves information that a species guess cannot replace. Mining, transport and later weathering may all have fragmented the material: broken bones alone are not evidence of predation or the age of the fish.
Significant discoveries and documentation milestones at Dalmellington Tip, in chronological order.
2008 – The fossil-bearing tip documented
The original field guide recorded fish teeth, scales, bones, coprolites, plants and shells in the spoil, together with the steep-slope hazards. Its recorded inspection year provides a dated account of the collecting locality, rather than a date of first fossil discovery or a present-day access guarantee.
2021 – A further account of the mixed-spoil assemblage
A December collector account described plant and fish remains at the village heap, including tentative ray-finned-fish identifications and reports of rarer vertebrate fragments. Crucially, it explained that the dumped material could not be placed precisely in its original stratigraphic succession. The account treated the farther Pennyvenie mine heaps separately.
2024 – Local nature-conservation mapping adopted
The adopted Cumnock Burn/Pennyvenie Burn Local Nature Conservation Site map includes the disused tip at the guide’s locality reference. This places the collecting locality within a wider habitat-conservation setting, without establishing collecting permission or an SSSI designation.
GEOLOGY
Dalmellington Tip is an accumulation of excavated mine waste, rather than a natural section through beds in their original order. Its geological interest lies in the variety of Coal Measures rocks and fossils brought together in the spoil. The original guide associated the material with the Scottish Lower and Scottish Middle Coal Measures formations, of Langsettian and Duckmantian age respectively. Those are useful regional Carboniferous labels, but they are not demonstrated assignments for every block or photographed fossil.
The Scottish Coal Measures Group formed in changing river, floodplain, lake and wetland environments. Sand accumulated in channels and advancing deltas, finer sediment settled in quieter water, and vegetation grew on wet ground. Buried plant-rich deposits became coal, while soils beneath some coal seams are preserved as seatearth. Repeated changes in sediment supply and water conditions produced alternating sandstone, siltstone, mudstone and coal. This variety helps explain why the spoil contains rocks that differ greatly in grain size, hardness and fossil content.
Fine mudrock can preserve small fish fragments and plant impressions that would be difficult to recognise in a coarse sandstone. Dark shale is a promising search material in the published accounts, but its colour alone does not show that it was deposited in the sea. Much of the regional succession is nonmarine. Occasional marine incursions produced marker bands used by geologists to correlate undisturbed sections; no particular marine band has been verified as the source of a fossil-bearing slab from this heap.
Mining removed these rocks from their original positions and dumping mixed material from different levels. A layer-like arrangement in the spoil therefore cannot be read as a sedimentary succession, and the height or position of a find on the heap does not give its geological age. The original field description emphasised hard blocks called limestone as well as shale; the complete lithological mixture has not been verified, so similar-looking hard blocks should not all be labelled limestone without examination. The chart and expanded account distinguish the regional framework from what can actually be established for loose spoil.
Detailed geology of Dalmellington Tip: regional Coal Measures framework, fossil-bearing spoil and the limits of source-bed identification.
The finest defensible framework is the Scottish Coal Measures Group, with the Lower and Middle formations retained as regional context from the original guide. The exact-tip 2021 account explicitly records mixed dumped material whose original source and stratigraphic position cannot be pinpointed. No measured local succession, formal member, named source seam or specimen-level bed assignment is established for this heap.
SCOTTISH COAL MEASURES GROUP
Regional setting and rock types. The group comprises repeated sandstone–mudstone cycles with coal and seatearth, formed across alluvial plains, deltas, lakes and wetlands. Both upward-fining and upward-coarsening cycles occur. Plant-bearing or rooted fine sediment records floodplain conditions; channel sandstone, lake mudstone and peat-forming wetlands represent other parts of this landscape. Marine bands are uncommon but important for correlation. These are regional environmental interpretations, not a claim that each rock type or environment has been identified in every part of the tip.
Group boundaries and age. Across Scotland, the group ranges from Langsettian to Asturian age. Its base is placed at the Lowstone Marine Band, a local equivalent or an appropriate disconformity; an unconformity beneath Permian strata marks its regional top. The group’s full age range must not be assigned to the heap as a demonstrated range of source beds. The legacy tip attribution is narrower, covering Lower and Middle Coal Measures, and does not establish Upper Coal Measures material here.
Scottish Lower Coal Measures Formation — regional context
Age, lithology and boundaries. The formation is Langsettian, traditionally Westphalian A. Regionally it contains repeated sandstone, siltstone and mudstone cycles, commonly coarsening upwards but locally fining upwards, with seatearth and coal. Mudstone and siltstone are generally grey to black, and sandstone is fine- to medium-grained and pale grey to off-white. Its lower boundary is the base of the Lowstone Marine Band, its local equivalent or an appropriate disconformity; its upper boundary is the base of the Vanderbeckei, or Queenslie, Marine Band. These boundary names explain the formal unit and do not identify bands exposed on this tip.
Relevance to the spoil. Lower Coal Measures is part of the original guide’s interpretation of the source rocks. Neither a dark shale colour nor an isolated plant or fish fragment is enough to separate a Lower Formation block from similar Middle Formation material. No local thickness, complete cycle or member is assigned here.
Scottish Middle Coal Measures Formation — regional context
Age, lithology and boundaries. The formation is Duckmantian, traditionally Westphalian B. Like the Lower Formation, it includes recurring sandstone, siltstone and mudstone with seatearth and coal; this overlap in lithology is one reason loose spoil is difficult to place precisely. Its base is the base of the Vanderbeckei (Queenslie) Marine Band. Its top is now drawn at the base of the Aegiranum (Skipsey’s) Marine Band, which begins the overlying Scottish Upper Coal Measures Formation. Older definitions placed that division at the top of the marine band; they should not be combined with the modern boundary.
Relevance to the spoil. The original guide regarded Middle Coal Measures as an important component. The available exact-tip evidence does not tie individual finds to that formation, a named coal roof, a marine band or any measured horizon. Regional formation thicknesses and nearby burn logs therefore have no place in a measured column for this heap.
Mixed spoil, fossil preservation and missing order. Fish fragments, plants and coprolites occur in detached rock rather than a recorded in-situ bed. Fossil-bearing slabs may preserve their own fine layering, but that small-scale structure does not recover their original position in the coalfield succession. Record matrix and provenance faithfully, keep associated pieces together and leave the source bed unknown unless new evidence establishes it.
References.
Hoare, G. (December 2021), Dalmellington Fossils, Geological Society of Glasgow newsletter 164/2, pp. 9–10 (first heap only).
BGS Lexicon: Scottish Coal Measures Group.
BGS Lexicon: Scottish Lower Coal Measures Formation.
BGS Lexicon: Scottish Middle Coal Measures Formation.
SAFETY
The steep heap is unstable and unsuitable for children. Falling or sliding blocks are a serious hazard, including below slopes that appear quiet. Do not climb the sides, stand beneath loose faces, undermine blocks or work below another person. The perimeter is not automatically safe: if stable, permitted loose material cannot be reached without exposure to falling rock, do not collect.
The original approach crossed grass and trees concealing large blocks and old walls. Watch every step, particularly in wet or overgrown ground, and do not enter mine workings or neighbouring operational or restoration areas. Wear sturdy footwear; where authorised splitting is appropriate, use eye protection and keep other people well clear. The historic photographs and 2008 inspection are not a current stability assessment.
EQUIPMENT
A hand lens, camera and small scale help with tiny dark fish fragments and plant surface markings. Carry labels, soft wrapping and rigid shallow boxes so shale pieces can be packed separately with their flat surfaces supported. Avoid overloading a bag with large slabs.
A small geological hammer and suitable splitting tool are only useful where permission covers their use and a stable loose slab can be worked safely. Eye protection is essential for any splitting. Tools are not a means of excavating the heap or levering out heavy blocks.
CLEANING AND TREATING
Brittle shale and thin fossil films are easily damaged. Support each slab during handling and begin with close inspection; remove only loose surface dirt with a very soft dry brush where the fossil surface is sound. Do not scrub across delicate scales, plant impressions or weathered bone. Keep a matching counterpart with the main specimen.
Avoid soaking, acids, bleach and routine varnish. Wet shale may separate along its layers, and attempts to make a dark fossil stand out can destroy useful detail. Let damp finds dry gradually at room temperature with support. If a specimen is flaking or may be important, leave it unprepared and seek specialist advice about stabilisation and any reversible consolidant appropriate to that particular matrix.
IDENTIFY YOUR FINDS
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FURTHER READING
Dalmellington Fossils — December 2021 collector account, pp. 9–10 (distinguish the first heap from the later sites)
BGS: Scottish Coal Measures Group — regional geological background
NatureScot: Scottish Fossil Code
East Ayrshire Council: Local Nature Conservation Sites, Cumnock Burn/Pennyvenie Burn, pp. 81–82
ACCESS RIGHTS
Arrange permission from the landowner or occupier before collecting, and ensure that it covers the removal and retention of fossils from the appropriate rights-holder. Mineral rights may be held separately. Scotland’s responsible-access framework should not be treated as permission to extract and keep fossils. A previous collector’s permission does not extend automatically to other visitors.
East Ayrshire Council’s adopted Local Nature Conservation Sites map includes the disused tip at this guide’s locality reference within Cumnock Burn/Pennyvenie Burn. This map-level match does not define every part of the heap or its approach. Respect vegetation and habitats as well as the rocks. This local designation is distinct from SSSI status; neither the absence of an SSSI label in an older guide nor the lack of a published closure establishes unrestricted collecting or hammering rights.
Scotland’s fossil resource is at risk of abuse and damage, and so we must all safeguard and manage fossil collecting to ensure its survival for future generations. For this reason it is VITAL you read and adhere to the Scottish Fossil Code for ALL sites in Scotland.
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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