The lost rainforest of the West Cumberland Coalfield (Part 4): After the drowning – the roof-shale succession

Every coal seam in the West Cumberland Coalfield district records the accumulation of peat in a mature lycopsid swamp. But just as revealing as the coal itself is what lies immediately above it – the roof shales. These fine-grained sediments record the moment when the forest drowned, the swamp surface subsided or flooded, and a new ecological phase unfolded above the buried peat. In the West Cumberland Coalfield, roof shales are exceptionally well developed and preserve a full sequence of the events that followed each catastrophic rise in water level.

Geology museums of Britain: The Blaenavon Industrial Landscape (Part 2) – Big Pit, Blaenavon, Monmouthshire

Jon Trevelyan (UK) Rising above the hills near the town of Blaenavon is the distinctive headgear of Big Pit, one of the most recognisable symbols of the South Wales Coalfield (Fig. 1). Today, the site forms part of the National Coal Museum of Wales, but for nearly a century it … Read More

The weird and wonderful of the Ordovician (Part 2): Didymograptus murchisoni – a classic marker of the Middle Ordovician

Jon Trevelyan (UK) This is the second in my series of short articles on fossils of the Ordovician. Among the many colonial organisms that chart the course of Ordovician seas, Didymograptus murchisoni remains one of the most recognisable. A key graptolite of the Middle Ordovician, it combines elegant morphology with … Read More

Geology museums of Britain: The Blaenavon Industrial Landscape (Part 1) – the Iron Works, Blaenavon, Monmouthshire

Jon Trevelyan (UK) The ruined furnaces of Blaenavon rise unexpectedly from the Welsh hillsides like the remains of some vast industrial fortress. Massive retaining walls, towering masonry structures and steep charging ramps still dominate the landscape, despite the silence that now surrounds them. Grass and wild flowers spread across terraces … Read More

Geology museums of Britain: The Crystal Palace dinosaurs – the birth of scientific reconstruction

With the restoration of the Crystal Palace prehistoric sculptures and their remarkable Geological Court now virtually complete, it is perhaps worth asking why this unique Victorian landscape continues to command such scientific and historical importance. Why should geologists, palaeontologists and members of the public still make the journey to south London to see reconstructions that are now more than 170 years old and, in many respects, scientifically outdated?

Geology museums of mainland Europe: The Galerie de Paléontologie et d’Anatomie Comparée, Paris

Jon Trevelyan (UK) The Galerie de Paléontologie et d’Anatomie Comparée, part of the Muséum national d’Histoire naturelle, is located in the Jardin des Plantes in Paris. Established in 1898, the gallery showcases an extensive collection of fossils and anatomical specimens, offering insights into the evolution of life on Earth. The … Read More

The lost rainforest of the West Cumberland Coalfield (Part 2): A forest of giants – Lepidodendron and Sigillaria

The most visually arresting fossils from the West Cumberland Coalfield, indeed from almost any British Carboniferous site, are the great patterned slabs of lycopsid bark that, if you are lucky, can sometimes be found. Their surfaces carry unmistakable geometric signatures: the diamond-shaped leaf cushions of Lepidodendron or the vertical rows of elongated scars typical of Sigillaria.

Book review: Beneath the Stone: CT Imaging Applied to Fossils, by Jean-Claude Le Van An

“Never judge a fossil by its surface.” Although not stated quite so succinctly, this is the central message running through Beneath the Stone. Jean-Claude Le Van An demonstrates that a fossil’s outward appearance often tells only part of the story. Hidden beneath the surrounding rock may be exquisite anatomical detail, evidence of ancient life never visible to the naked eye – or, occasionally – proof that an apparently spectacular specimen is not what it seems.

Aberdare: Coal, memory and the fossil forests beneath

This article explores a single landscape – Aberdare – through three interlocking layers: the Carboniferous forests that formed the coal, the industrial system that extracted it, and the lives lived within that system. Each survives only in fragments: fossils weathering from shale, objects preserved in family memory, and traces embedded in the modern landscape. Taken together, these fragments allow the reconstruction of a place in which deep time, industry and lived experience are inseparable.

The lost rainforest of the West Cumberland Coalfield (Part 1): A window into the Carboniferous tropics

The fossils described in this series formed during the Carboniferous Period, around 320 million years ago, when Britain lay close to the Equator. The above figure places the Carboniferous within Britain’s wider geological history. During this interval, extensive tropical wetlands covered much of the country, producing the peat deposits that would later become the coal seams of the West Cumberland Coalfield. This series explores one remarkable record of that vanished landscape.

Nothosaurus marchicus: A reconstruction of a Sauropterygian from Winterswijk, The Netherlands

Dennis C Nieweg (The Netherlands) and Dick Mol (The Netherlands) In April 2012, the exhibition Zeemonsters in Twente, opened its doors in Museum TwentseWelle in Enschede, The Netherlands (Fig. 2). The exhibition (held until the 28 October) told the story of the Triassic marine reptiles (Sauropterygians) found in the Dutch … Read More

A tectonic history of Britain (Part 4): A quiet crust with a long memory – tectonic inheritance in the modern British landscape

Modern Britain lies far from active plate boundaries. It has no active volcanoes and experiences only minor earthquakes, and is often described as tectonically quiet. Yet its landscape is anything but passive. Hills and lowlands, coastlines and drainage patterns all reflect a deep structural inheritance established during earlier phases of continental collision, collapse and rifting.

Book review: In Search of Sea Dragons: A Fossil Hunter’s Odyssey, by Matthew Myerscough

Matthew Myerscough’s In Search of Sea Dragons: A Fossil Hunter’s Odyssey begins not with fossils, but with survival. Early in the book, Myerscough recounts how he and his future wife narrowly escaped death in an avalanche on Snowdon. The experience casts a long shadow over everything that follows. What initially appears to be a book about fossil hunting, gradually reveals itself as something rather more personal: a memoir about recovery, obsession, friendship and the strange hold that collecting can exert over people.

A tectonic history of Britain (Part 3): Britain breaks apart – rifting, volcanoes and the birth of the Atlantic

By the end of the Carboniferous, Britain had already passed through more than one major phase of mountain building, each followed by long periods of erosion and structural collapse. The Caledonian mountains were long eroded, and the Variscan belt of southern Britain was entering its final stages of decay. Yet tectonic influence did not fade away. Instead, the dominant regime changed. Britain was no longer being compressed – it was being stretched.

A tectonic history of Britain (Part 2): When mountains fall – collapse, basins and the foundations of Britain’s lowlands

The collision that assembled Britain at the end of the Silurian (see A history of the plate tectonics of Britain (part 1): Britain assembled – oceans, collisions and the making of a geological patchwork) did not mark the end of tectonic influence on the landscape. Instead, it marked the beginning of a new phase – one that is often less intuitively grasped, but just as important. Mountain belts are temporary features. Once continental collision ceases, thickened crust becomes gravitationally unstable. Erosion strips material from the surface, while extension and faulting affect the deep roots of the orogen. The geological record that follows is not one of rising peaks, but of collapse, subsidence and redistribution.

Geology museums of mainland Europe: The museum national d’Histoire naturelle’s Galerie de Géologie et de Minéralogie, Paris

Jon Trevelyan (UK) The origins of the collection at the Museum national d’Histoire naturelle’s Galerie de Géologie et de Minéralogie in Paris date back surprisingly far. In 1625, under Louis XIII, minerals thought to have medicinal virtues were deposited in the ‘droguier du roi’ (royal drug cabinet) associated with the then … Read More