Trearne QuarrY

This was once an excellent site of a forma working quarry and was highly productive, especially for bivalves and brachiopods from Carboniferous marine shale deposits. Corals were also very common here. Sadly this site has now become filled in and overgrown.


♦ From Glasgow, head west along the M8 motorway. Just after the Glasgow Airport flyover, take Junction 28a onto the A737 towards Irvine.
♦ After around 6.5km, just after the turn off to Johnstone, take the right hand lane and stay in it. The road will become a single carriageway. Follow this road for about 16km until you come to a roundabout. Take the first left heading for Beith and Irvine.
♦ At the next roundabout, take the second left, again heading for Beith and Irvine. Then take the second turn on your left onto the B777 heading to Gateside and Lugton, which is about 4km from the roundabout.
♦ Go through Gateside and take the first turn on your right onto Sharon Street. (This is not named.) On your right and 200m further along this road, you will see a small parking space beside a gate. This can be used if you want to enter the quarry, but not by its main entrance.
♦ Alternatively, drive for about 2.5km and, on the left, is a bungalow. The main entrance to the quarry is opposite this.
♦ From Gateside, take the first turn on the right into Sharon Street. (This is not named.) There is a small parking space beside a gate, about 200m along this road on the right. This can be parked in if you want to enter the quarry, but not by its main entrance.
♦ Alternatively, drive for around 2.5km and, on the left is a bungalow. The main entrance to the quarry is opposite this.
♦ Ref: 55.27472°N, 4.78109°W


FIND FREQUENCY: CLOSED – This quarry has become overgrown and fossils can no longer be found.
ACCESS: ♦♦ – Access to the quarry is through the main road running in and out of the site, although it is not advisable to use this during the week or while the quarry is working. The location can be hard to find, but if you follow the directions above, you should not have any problems.


This quarry is now closed and is grassed over. Fossils can no longer be found.

Many varieties of fossil can be found here within a very small distance. Among these are brachiopods, bivalves, gastropods, corals, crinoids, blastoids, polyzoa, and the occasional shark’s tooth and trilobite carapaces. The best specimens are found in the dark grey beds of shale.


The rock face itself is only about 4.5 to 6m high, but care still has to be taken when walking near to the edge or the face, as most of the quarry has not been worked for some years. Although this is the case, many fossils are still being weathered out and can easily be removed.

On entering the quarry by its main entrance, check the strata on the right where the shale beds are full of fossils in near perfect condition. Work your way round the quarry, keeping the rock face to your right and you will see horizontal limestone and shale bedding, all containing fossils. Ahead, you will eventually see the new workface, which you will need to keep well clear of.


Trearne Quarry cuts into marine Blackhall Limestones of the Lower Limestone Formation, from the Brigantian substage of the Dinantian (Lower Carboniferous), from 326-331 Mya and tuffaceous mudstones and tuffs of the Kirkwood Formation deposits, part oif the Clackmannan Group of the Aspian substage of the Lower Carboniferous from 326-335 Mya.

Trearne Quarry.jpg



This site is an SSSI. This Special Site of Scientific Interest, means you can visit the site, but hammering the bedrock is not permitted.

6a4bfbf50b99eb839741fb99dca95014f77f693a_hq.jpgScotland’s fossil resource is at risk of abuse and damage, and so we must all safeguard and managed 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


Buy Fossils, Crystals, Tools
Location Discussions
Deposits Magazine
Join Fossil Hunts
UK Fossils Network