Deposits Earth Science Archive
An acclaimed international collection of articles and book reviews on fossils, geology, minerals, palaeontology and earth science
Jon Trevelyan (UK) This is the fifteenth in my series of short articles on fossils of the Cambrian. Among the many extraordinary organisms preserved in the Middle Cambrian Burgess Shale, Pikaia gracilens stands out not for its strangeness but for its quiet familiarity. Living around 508 million years ago, this … Read More
Jon Trevelyan (UK) “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 … Read More
Hans-Henrik Meyer (Denmark) This article was written in 2011. While some of it is clearly out of date, hopefully it is still relerant for those wishing to visit the museum. The Möns Klint GeoCenter continually strives to improve the understanding of life in the Chalk Sea of 70mya. Therefore, a … Read More
Jon Trevelyan (UK) This is the fourteenth in my series of short articles on fossils of the Cambrian. Few Cambrian animals have captured the public imagination and baffled palaeontologists quite like Opabinia regalis, an extraordinary creature from the Middle Cambrian Burgess Shale. With its five eyes, backwards-facing mouth, and a … Read More
Jon Trevelyan (UK) Simplified summary of Britain’s geological history from the Precambrian to the present day. The coloured timeline shows the major geological periods discussed throughout this series, while the illustrations above represent some of the dominant landscapes and environments that characterised each interval. The red line(s) indicates the geological … Read More
Jon Trevelyan (UK) This is the thirteenth in my series of short articles on fossils of the Cambrian. Olenoides serratus is one of the most recognisable members of the Burgess Shale fauna – a trilobite that, unlike so many of its soft-bodied neighbours, still looks reassuringly like a trilobite. Yet … Read More
Jon Trevelyan (UK) Simplified summary of Britain’s geological history from the Precambrian to the present day. The coloured timeline shows the major geological periods discussed throughout this series, while the illustrations above represent some of the dominant landscapes and environments that characterised each interval. The red line(s) indicates the geological … Read More
Jon Trevelyan (UK) This is the twelfth in my series of short articles on fossils of the Cambrian. Among the many unusual organisms preserved in the Chengjiang and Burgess Shale-type faunas, Odontogriphus omalus stands out as one of the most revealing. A soft-bodied, oval creature from the early Cambrian seafloor, … Read More
Jon Trevelyan (UK) Simplified summary of Britain’s geological history from the Precambrian to the present day. The coloured timeline shows the major geological periods discussed throughout this series, while the illustrations above represent some of the dominant landscapes and environments that characterised each interval. The red line(s) indicates the geological … Read More
Jon Trevelyan (UK) This is the eleventh in my series of short articles on fossils of the Cambrian. Nectocaris pteryx is one of the most perplexing and remarkable animals of the Cambrian, a soft-bodied swimmer from the Burgess Shale, whose anatomy has challenged, confounded and intrigued palaeontologists for decades. Living … Read More
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
Jon Trevelyan (UK) This is the tenth in my series of short articles on fossils of the Cambrian. Among the richly preserved fossils of the Early Cambrian Chengjiang biota, Myllokunmingia fengjiaoa stands as one of the most revealing. Discovered alongside Haikouichthys, and dating to around 518 million years ago, this … Read More
Jon Trevelyan (UK) Simplified summary of Britain’s geological history from the Precambrian to the present day. The coloured timeline shows the major geological periods discussed throughout this series, while the illustrations above represent some of the dominant landscapes and environments that characterised each interval. The highlighted box indicates the geological … Read More
Jon Trevelyan (UK) This is the ninth in my series of short articles on fossils of the Cambrian. Microdictyon sinicum is one of the most distinctive and intriguing creatures of the Early Cambrian, known primarily from the Chengjiang biota of Yunnan, China. Dating to around 518 million years ago, it … Read More
Jon Trevelyan (UK) Simplified summary of Britain’s geological history from the Precambrian to the present day. The coloured timeline shows the major geological periods discussed throughout this series, while the illustrations above represent some of the dominant landscapes and environments that characterised each interval. The red line(s) indicates the geological … Read More
Jon Trevelyan (UK) This is the eighth in my series of short articles on fossils of the Cambrian. Marrella splendens is one of the most recognisable and abundant animals from the Burgess Shale, offering an invaluable window into the complexity of Cambrian ecosystems. Often nicknamed “the lace crab” by early … Read More
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.
Michael C Mackiewicz (USA) Minerals have shaped human societies for thousands of years and will do so well into the future. Today, a newer category of materials has moved to the forefront of global attention: critical minerals. These are the elements and minerals that are fundamental components in modern technologies, … Read More
Jon Trevelyan (UK) This is the seventh in my series of short articles on fossils of the Cambrian. Leanchoilia illecebrosa is one of the most striking and memorable arthropods from the early Cambrian, known from the Chengjiang biota of China and represented by exquisitely preserved soft tissues. Living around 518 … Read More
Heather Middleton, Mike Harvey and Steve Snowball (UK) This article describes a series of pliosaur remains recovered from the Lower Kimmeridge Clay Formation at Smallmouth Sands, Weymouth (Dorset). The material, collected as isolated elements from a single locality within the Rasenia cymodoce Biozone, includes cervical and caudal vertebrae, ribs and … Read More
Jon Trevelyan (UK) This is the sixth in my series of short articles on fossils of the Cambrian. Few Cambrian fossils have caused more confusion – and more delight – than Hallucigenia sparsa, a tiny, spike-covered creature from the Burgess Shale, whose anatomy was so baffling that early reconstructions were … Read More
Jon Trevelyan (UK) Simplified summary of Britain’s geological history from the Precambrian to the present day. The coloured timeline shows the major geological periods discussed throughout this series, while the illustrations above represent some of the dominant landscapes and environments that characterised each interval. The red line(s) indicates the geological … Read More
Jon Trevelyan (UK) This is the fifth in my series of short articles on fossils of the Cambrian. Among the remarkable organisms preserved in the Early Cambrian Chengjiang biota, Haikouichthys ercaicunensis occupies a special place. Living around 518 million years ago, this small, fish-like animal is widely regarded as one … Read More
Michael C Mackiewicz (USA) Manganese (Mn) is one of the most widely used metals in modern civilisation, but despite this, Mn has for decades received only passing attention, often overshadowed by headline elements such as lithium, cobalt, nickel and the rare earths. As the twelfth most abundant element in Earth’s … Read More
Jon Trevelyan (UK) This is the fourth in my series of short articles on fossils of the Cambrian. Fuxianhuia protensa is one of the most informative animals from the early Cambrian Chengjiang biota, dating to roughly 518 million years ago. Often described as a “problematic” or “transitional” arthropod, it occupies … Read More
Jon Trevelyan (UK) Simplified summary of Britain’s geological history from the Precambrian to the present day. The coloured timeline shows the major geological periods discussed throughout this series, while the illustrations above represent some of the dominant landscapes and environments that characterised each interval. The red line(s) indicates the geological … Read More
Jon Trevelyan (UK) This is the third in my series of short articles on fossils of the Cambrian. When the Burgess Shale was first uncovered in the early twentieth century, few creatures caused as much confusion, misinterpretation and eventual astonishment as Anomalocaris. Today, it stands as one of the most … Read More
At first glance, Geology: an illustrated history appears to be another entry in the now familiar genre of large-format, image-rich popular science books. In practice, however, David Bainbridge has produced something rather more distinctive: a visually driven history of geology in which images – maps, diagrams and artefacts – take a leading role, with the text providing interpretation and context.
Steve Snowball (UK) This article is a response to a request by the editor of Deposits to write about my inspiration and reasons for writing a series of fossil collecting guides, the latest of which is A Field Guide to Collecting British Cenozoic Fossils, by myself and Alister Cruickshanks, and … Read More
Jon Trevelyan (UK) This is the second in my series of short articles on fossils of the Cambrian. Amiskwia sagittiformis is one of the most intriguing and persistently debated animals from the Middle Cambrian Burgess Shale. First described over a century ago, it long occupied a taxonomic no-man’s-land: too soft-bodied … Read More
