Stansgate
Region: Essex
Nearest Town: Stansgate
Geological Age: Ypresian • Eocene • Palaeogene • Cenozoic
Site Type: Foreshore
About the Site
Stansgate is a London Clay fossil locality on the southern side of the Blackwater Estuary in Essex, east of Steeple Bay.
The fossil-bearing area is the foreshore in front of Stansgate Abbey Farm, where a broad platform of London Clay can be exposed around low tide. There is no substantial fossil cliff: the clay appears across the foreshore and is frequently covered by modern estuarine mud and silt.
The locality is particularly known for fossil crustaceans, including lobster and crab remains, together with shark and other fish remains, molluscs and crinoid fragments.
Finding fossils generally involves careful examination of naturally weathered material rather than excavation. Exposure can vary considerably between visits because tides repeatedly cover and uncover the London Clay platform.
Geology & Stratigraphy
The fossil-bearing rock belongs to the London Clay Formation, part of the Thames Group and of Ypresian age.
At Stansgate, London Clay forms a low intertidal platform rather than a cliff section. Modern mud and silt frequently obscure the bedrock, so the amount of London Clay visible can vary substantially with tidal and sediment conditions.
Published geological assessment places Stansgate within the traditional Division B of the London Clay, forming a continuation of the comparable exposure at nearby Steeple Bay.
Under the modern BGS lithostratigraphic framework, Division B corresponds to the Aveley Member of the London Clay Formation. The Aveley Member consists mainly of silty clay with discontinuous layers of claystone concretions and occasional thin beds or partings of silt, very fine sand and glauconitic clay.
Older collecting literature sometimes gives more detailed positions within Division B. These historical subdivisions remain useful for comparison with older fossil records but should not be treated as modern formal Geological Units.
Palaeoenvironment & Palaeoecology
The London Clay at Stansgate was deposited in a marine shelf environment during the Early Eocene.
Fine mud settled onto the seabed under relatively quiet marine conditions. Geological work on the local Division B deposits interprets this part of the London Clay succession as representing a comparatively deeper-water phase of deposition.
Crustaceans, molluscs, crinoids, sharks and bony fish formed part of the marine community. The fossils preserved at Stansgate therefore represent organisms living either on the muddy seabed or in the water above it.
The modern Blackwater Estuary is much younger. Its tides now erode and expose sediments that originally accumulated in the Early Eocene sea.
Fossil Preservation & Taphonomy
Crustacean remains are characteristic of Stansgate and can occur within phosphatic or other small concretions, although fossil-bearing nodules appear less concentrated here than at nearby Steeple Bay.
Pieces of crab or lobster may be visible as sections of carapace, claws or other hard parts.
Shark teeth and other fish remains can weather completely free of the clay and become concentrated amongst shingle and other resistant material on the upper foreshore.
Crinoid stem fragments and molluscan material can also survive the erosion process.
Once released from the London Clay, fossils are moved by modern tides and become mixed with recent shingle, mud and estuarine debris. Their exact original bed therefore cannot normally be determined from the point where they are picked up.
The London Clay itself is frequently buried beneath younger mud and silt, so productive patches can appear or disappear between visits.
Collecting Guidance
The London Clay is best exposed around low tide, particularly where recent tidal action has removed some of the modern mud or silt covering the platform.
Search the firmer upper part of the accessible foreshore rather than following the water out across the mudflats.
Patches of shingle and washed material can concentrate shark teeth, small fish remains and fragments released from the clay.
Conditions vary significantly from one visit to another because fresh estuarine sediment can quickly cover previously exposed London Clay.
Useful equipment includes:
- sturdy waterproof footwear
- gloves
- knee pads
- a hand lens
- small specimen bags or boxes
- a small hand sieve
- labels or a notebook
- a phone for checking tides and weather
A geological hammer is unnecessary.
What to Look For
Search the firmer upper foreshore, particularly where London Clay or patches of shingle are exposed through the modern mud.
Small nodules may contain crustacean material. Look for regular shell texture, pieces of carapace or recognisable claw structures rather than assuming every concretion contains a fossil.
Small shark teeth can occur loose amongst the shingle. Smooth enamel, a definite crown and part of the root are useful features to look for.
Fish teeth, small bones and other vertebrate remains may be less obvious and reward close searching.
Crinoid stem fragments can occur as small rounded or cylindrical pieces with an organised internal pattern.
Molluscan shell material may also weather from the clay.
Do not ignore small pieces simply because they are fragmentary: much of the characteristic Stansgate material is considerably less conspicuous than a complete large fossil.
Use Fossils at this Site for individual species identification.
Fossils at this Site
Explore fossils recorded from this site, see how to recognise them and, where enough LBPS records exist, what collectors are actually finding.
What collectors are finding
Typical examples from this site
Different anatomical parts or preservation styles can look very different. Choose an example to view it larger.
About this information
Fossil occurrences come from reviewed LBPS records. Encounter frequency and abundance use eligible collecting sessions where all finds were recorded. Preservation rarity uses the condition recorded at the time of collecting. Identification photographs may come from dedicated Fossil Examples or linked public LBPS Specimens; neither influences rarity or frequency calculations.
Visitor & Access Information
General Location
On the southern shore of the Blackwater Estuary in Essex, at Stansgate, east of Steeple Bay.
The LBPS locality represents the fossil-bearing foreshore immediately in front of Stansgate Abbey Farm.
It should not be expanded to include Steeple Bay or the wider Blackwater shoreline.
Directions
Approach Stansgate using the established road and public footpath network and join the signed King Charles III England Coast Path.
The fossil locality lies on the Blackwater Estuary side of the coastal route in the Stansgate Abbey Farm area.
Follow current signs and established access routes rather than crossing fields or private farm property.
Because public coastal-access rights do not automatically extend onto the intertidal mud and saltmarsh, only enter the foreshore where access is permitted.
Parking
There is no dedicated public fossil-site car park that LBPS can currently confirm at Stansgate.
Visitors should use lawful parking away from private farm entrances and approach using public rights of way.
Do not use Stansgate Abbey Farm, private drives or neighbouring commercial premises for parking without permission.
Terrain
The public coastal route is mainly along low-lying sea walls, paths and agricultural coastline.
The fossil locality consists of a low London Clay platform with patches of shingle and weathered clay, surrounded by extensive modern mud and saltmarsh.
There are no substantial cliffs.
The lower intertidal ground is very soft and is unsuitable for normal walking.
London Clay itself can also become extremely slippery when wet.
Access, Permissions & Responsible Collecting
The King Charles III England Coast Path passes the Stansgate area and provides public pedestrian access along the coast.
However, the official coastal-access arrangements specifically exclude public access rights from the intertidal mudflats and saltmarsh along this section because they are unsuitable for general public access.
The existence of the coast path therefore should not be interpreted as giving unrestricted public access to every part of the foreshore.
Use the signed public route to reach the area and respect gates, signs, private land and any locally indicated restrictions. Permission should be obtained where access to the fossil-bearing foreshore crosses or uses land outside established public rights.
Where collecting is permitted, concentrate on small amounts of naturally weathered loose material. Do not excavate the London Clay platform or disturb saltmarsh vegetation.
Safety & Legal Information
Safety Information
The principal hazard is deep estuarine mud.
Natural England considers the intertidal mudflats and saltmarsh along this section unsuitable for general public access and excludes coastal access rights from them.
Do not walk towards the water across smooth or soft mud. Even at low tide, apparently firm areas can become much deeper and more difficult to cross.
The fossil-bearing platform is tidal, so check tide times before visiting.
Wet London Clay is slippery, particularly where algae or standing water covers the surface.
The locality is relatively remote compared with more developed coastal sites, so carry a phone and allow sufficient daylight and time for the return walk.
SSSI / Legal Restrictions
Stansgate lies within the Blackwater Estuary Site of Special Scientific Interest, which is protected primarily for its estuarine wildlife and habitats. The area also forms part of wider SPA, Ramsar, SAC and Marine Conservation Zone designations.
The fossil exposure is additionally recognised as Stansgate Foreshore Local Geological Site MaG9 by GeoEssex because of its London Clay exposure and fossil assemblage.
Public access along the King Charles III England Coast Path does not create public access rights across the intertidal mudflats and saltmarsh. Those areas are subject to a year-round access exclusion because they are considered unsuitable for public access.
Visitors should therefore remain on recognised routes and only enter the fossil-bearing foreshore where lawful access exists.
Where collecting is permitted, keep it low impact. Do not excavate the London Clay platform, remove large quantities of sediment or damage saltmarsh and other protected habitats.