An ammonite enthusiast buying produce from the market in Coutras, France.

#FossilFriday Another of Johann Beringer’s peculiar ‘fossils’ carved by an unknown hand in Triassic Muschelkalk limestone. Exhibited at the Marienberg castle in Würzburg, Germany.

#TrilobiteTuesday Magnificent slab awash with trilobites from the Ordovician of Morocco. On display at the Palaeontological Museum in Oslo.

#MolluscMonday Small (<2 cm) glycymerid bivalve shell with characteristic taxodont dentition. Photographed on a building stone (almost certainly Oligocene Calcaire à astéries) in St Émilion, the famous centre for Bordeaux wine.

#FossilFriday Field photograph of a belemnite, partly wrapped in seaweed, eroding out of Lower Jurassic rocks on the Yorkshire coast. A human finger points to this ‘witch’s finger’, one of the multitude of folklore names coined for belemnites.

Pleased to find bryozoans on the menu at the Bastille Day lunch in La Barde.

#TrilobiteTuesday Missing its free cheeks, a distorted specimen of Ogygopsis from the Cambrian of Alberta, Canada. Paleontological Museum, Oslo.

Here's one of the figures.

#MolluscMonday Sectioned gastropod in a paving stone from a square in Chartres, west of Paris. @pavementgeology

#FossilFriday Illustration from Charles Lyell’s ‘The Student’s Elements of Geology’ (1871) of the Coralline Crag (Pliocene) bryozoan Meandropora aurantium. The fractured colony in figure b shows growth banding, perhaps representing annual growth increments.

#TrilobiteTuesday Paraceraurus from the Ordovician of Asker. Impressive left genal spine and paired pygidial spines. Galleries of the Oslo Palaeontological Museum.

While Spain and Portugal battle it out in the football World Cup, the Iberian contest of the rudist limestones pits a red Ezcaray pavement in Spain against the floor of Porto railway station in Portugal.

#MolluscMonday Where the streets are paved with rudist bivalves. San Sebastián in northern Spain.

I’m sure this old stone wall of a building in Aubeterre-sur-Dronne must have an interesting story to tell.

#FossilFriday Weathered building stone of Late Cretaceous (Campanian) age full of bivalves (Pycdodonte), larger foraminifera (Orbitoides), the mould of a solitary coral, plus a few bryozoans. From the wall of the ice cream parlour at Aubeterre-sur-Dronne, Charente, France.

#TrilobiteTuesday Gigantopygus bodoni from the Cambrian of Morocco, on display at the Palaeontological Museum in Oslo. Obliquely photographed to minimise reflectance from the glass top of the cabinet.

@bsky.app #MolluscMonday External moulds of the Jurassic gastropod Aptyxiella portlandica in Portland Stone cladding a bridge at Kingston-upon-Thames.

#FossilFriday Sections of the Carboniferous rugose coral Dibunophyllum bipartitum in black Frosterley Marble from County Durham at Peterborough Cathedral. This decorative limestone is seldom seen in churches as far south in England.

#TrilobiteTuesday Another trilobite on display at the Palaeontological Museum in Oslo. This one is Asaphus expansus,

#MolluscMonday Ammonites and their shadows at the Paleontologisk Museum, Oslo.

#FossilFriday The iconic Triassic crinoid Encrinus liliformis. This example from Braunschweig, Germany is on display in the Palaeontological Museum in Oslo.

#TrilobiteTuesday Ever wondered what the underside of a trilobite looked like? The answer can be found in this model trilobite I stumbled across languishing on a desk in the NHM last week.

I'm beginning to think increasingly that this might be the case. Here's a large Archimedes for your reference.

Any ideas about the identity of this pavement fossil from near Tower Bridge, London? The rock is Carboniferous Carlow Blue Limestone from Ireland, which is full of crinoid stems. Indeed this could be a crinoid but the long spine-like processes are weird. @pavementgeology.bsky.social

#MolluscMonday Superficially resembling an ammonite, this is the Ordovician nautiloid Discoceras from the Oslo region of Norway, on display at the Geologisk Museum, Oslo.

#FossilFriday Crinoid stems in the facing stone of the W.B. Samson cafe, Oslo, comprising Silurian limestone of the Braksøoya Formation from Brevik Quarry, Telemark.

Preparing to speak to the Amateur Geological Society in north London this evening. It will be my first talk on this topic. Fingers crossed.

#TrilobiteTuesday Ampyx from the Ordovician of Asker, Norway. On display in the Geologisk Museum, Oslo.

#MolluscMonday Sectioned gyrocone nautiloid displayed in the public galleries of the Oslo Geological Museum. Ordovician, USA.

#FossilFriday Silurian tabulate corals and crinoids in the stone facing of a building in Oslo. Braksøoya Formation from Brevik Quarry.