An acclaimed international collection of earth science articles and book reviews on palaeontology, geology, minerals and more
Niles Laurids Viby (Denmark) I have written a few articles for this magazine on specific formations here in Denmark. However, a lot of local fossil collecting is done simply by walking along the seashore. Some beaches are fronted by cliffs – and some of those are base rock, like the … Read More
P Formanoy and HJ Ahrens (The Netherlands) De Kuilen is a wet sandpit forming a lake and recreational area located near the small village of Langenboom, about 15 miles south of Nijmegen, in the eastern part of the Dutch province of Noord-Brabant (Fig. 1). Among fossil collectors, the site is … Read More
Michael D Johnson It has now been 63 years since a huge iron meteorite impacted the Sikhote-Alin Mountains of the former USSR. Imagine what it must have been like on that cold morning of 12 February 1947 – the tremendous smoke trail, the thunderous crash and the roaring sound it … Read More
In many ways, this updated guide is exactly what I want from a GA guide – extensive coverage, well written, and oodles of colourful photos and graphics. I liked and used the previous edition (GA No. 2), and it’s a shame that, for example, the Ordovician site of Stockdale Quarry has disappeared, but it – and no doubt other locations – has been replaced by, what I suspect, are just as good, if not better, sites.
Fiona Henderson and Evelyn Krull (Australia) Biochar has the potential to sequester carbon, improve soil health and increase crop yield. Even its production can be classed as beneficial, as it is a by-product of a process that burns waste materials to produce bio-fuel. However, questions remain. Although biochar offers an … Read More
Stephen Lautenschlager (Germany) The Lower Jurassic Posidonia Shale Formation of Southern Germany belongs to one of the most famous fossil lagerstätten in the world. Its sediments – finely laminated marly claystones – were deposited in a shallow, inland (epicontinental) sea, the Tethys Ocean, under tropical conditions. The dark grey colour … Read More
Dr G Trevor Watts In the fisrt part of this article (KratataAn excursion to Krakatau (Part 1)), I started to describe the geology of this famous volcano and also my visit to it. I now continue and you find me on fresh scoria and sulphurous steaming rock, standing on the … Read More
Dr G Trevor Watts (UK) Some researchers credit a major eruption of Krakatau (or Krakatoa, if you prefer) in the middle of the sixth century with the triggering the Dark Ages (Figs. 1 and 2). Whether or not this is true, the volcano was certainly responsible for about 36,000 deaths … Read More
Liz Porter (Australia) Australia has 14 different major types of soil. Maps showing soil profiles of different areas are very useful for farmers, people planning cities, people who look after natural resources and increasingly … forensic scientists! The foray into the world of crime solving by Australia’s Commonwealth Scientific and … Read More
Dr G Trevor Watts (UK) Cerro Negro (The Black Hill) is a stark, lively little volcano. Little known outside Nicaragua, it is easily accessible from the city of Léon and well worth the effort of the hike of about a thousand feet up. Location Cerro Negro is about 30km east-north-east … Read More
Deborah Painter (USA) Mali is frequently associated with the Tuareg rebel insurgents, poverty and the desertification we see in the 2023 news items about the country. I also think of Mali in terms of the healthy recipes using fish, green pepper, sorghum, spinach, rice, peanut butter, and other ingredients in … Read More
George Burden (Canada) The rickety taxi bumped and rattled its way southward, into the scenic peaks of the Dominican Republic’s northern cordillera. Frequent washouts from seasonal torrential rains make the going tricky and, at times, even a little perilous. However, we finally arrived at a small community, the site of … Read More
Megan Jacobs (UK) The history of geosciencein the UK is heavily dominated by men, with eminent figures such as Sir Richard Owen, Charles Lyell, William Buckland and Gideon Mantell famed for making many big advances in the early days of the science. However, in the background were powerful and intelligent … Read More
Alister Cruickshanks (UK) The discoveries made by Spirit, one of two exploration robots that NASA sent to Mars in 2003, have shown that it is more than likely that the planet once had oceans, lakes and rivers, and that water could still exist at the poles and in deep craters, … Read More
This book has something of an aspirational, rather than practical, feel to it. However, there is no doubt – in my mind anyway – that it is the best book on the geology of the Himalaya I have read. It is written with a nice light touch, with some humour. And it covers far more than just geology – where appropriate, it includes history, especially about the exploration of the subcontinent, and Asian culture.
Alister Cruickshanks (UK) In this second part of my article, I continue to follow the journey of Spirit, one of NASA’s twin exploration robots, in its exploration of the geological features of Mars up to its present position. The opportunity for the robot to explore has been curtailed during the … Read More
Rutile is a metallic-grey to earthy-red, brown, violet or black mineral, largely composed of titanium dioxide (TiO2). It is the most naturally occurring form of this particle and has among the highest refractive indices of any known mineral. It also has a hardness rating of 5.5 to 6.5. Apart from … Read More
I never realised just how diverse the rocks of this – the smallest of the Channel Islands – is. They are clearly well exposed and easily seen along the coast (and the cliffs are wonderful to look at). The guide also points out that the island’s rocks provide the best opportunity to see intrusive, igneous suites of the Cadomian orogeny (a tectonic event or series of events in the late Neoproterozoic, about 650 to 550 million years ago),and the lower Cambrian fluvial strata associated with post-Cadomian sedimentation. And I know from personal experience that each of the walks will be a delight, as the island is phenomenally beautiful.
Alister Cruickshanks (UK) It is perhaps one of the most exciting explorations in recent years – NASA’s Mars Exploration Rovers have changed our views of the red planet and re-written textbooks. In the past, researching and mapping the geology of Mars has seemed something that geologists could only dream of … Read More
Recently, I have finished the Great Silurian Controversy, a magnificent book about the nineteenth century arguments over the age of the lower Palaeozoic greywackes/sediments of Devon, and the creation of the concept of the Devonian. And reading The Lewisian: Britain’s oldest rocks by Graham Park, perhaps it occurs to me that this should perhaps be called, The Great Lewisian Controversy. It shares the same historical and scientific intentions, and the same grand sweep of scientific history from the early twentieth century, namely, the exploration over decades of the geology of the Lewisian of northwest Scotland.
Jon Trevelyan (UK) One rainy afternoon in March, rather than getting wet collecting fossils near Radstock, I abandoned my plans and paid a brief visit to the Wells & Mendip Museum in Somerset. It is not a geology museum, but it does have some great geological exhibitions. The museum (Fig. … Read More
Allen Fraser (UK) Shetland is a spectacular group of islands with a varied geology, a wonderful landscape and a special flora and fauna, peopled by a culture distinct within the British Isles. Shetland remains one of Britain’s natural treasures.” (J. Laughton Johnston) The islands Shetland sits on the edge of … Read More
Khursheed Dinshaw (India) Mohansinh Sodha (Fig. 1) is the founder of the Kutch Fossil Park located in Kutch, in the state of Gujarat in India. The park exhibits invertebrates, including ammonites, belemnites, nautilus (Fig. 2), brachiopods, gastropods (Fig. 3), corals (Fig. 4) and echinoderms. Marine fossils, including brachiopods and echinoderms, … Read More
Jon Trevelyan(UK) Contained in what was once the Radstock Market Hall (Fig. 1), this is perhaps one of my favourite local museums. Maybe it is because the museum is close to wonderful relics of the Somerset coal industry and to the Upper Carboniferous plant fossils that were a waste product. … Read More
Kaolinite is a clay mineral, first described in 1867 for its occurrence in the Jari River basin, Brazil. It is very common and is extensively mined in the UK, France, Brazil, Australia, India, Korea, USA and China. The mineral is mined under the name of Kaolin, but is more commonly … Read More
Deborah Painter (USA) Plant fossils come in a wider variety than this author used to believe. This article will discuss some of the different ways that plant fossils are preserved. Casts The fossil in Figs. 1 and 2 is a cast of Stigmaria. It is comprised of greyish sandstone. Sandy … Read More
Dr Neale Monks Of course, you can enjoy a fun and productive geological field trip using nothing more than your eyes to spot interesting specimens and your hands to collect them. At localities like Sheppey, where fossils are constantly being weathered out of soft clay, you can find shark teeth, … Read More
Khursheed Dinshaw (India) The Geology Museum of Ipoh in Malaysia is located inside the premises of the Department of Minerals and Geoscience Malaysia (Fig. 1). The museum is an interesting venue where you canlearn about both the geology and the geosciences of the country. The easy to navigate museum was … Read More
Michael E Howgate One hundred years ago, a grapefruit-sized lump of rock ended its four and a half billion year long journey through space by crashing into a field in northwest Essex. To be more precise, at 1pm on Friday, 9 March 1923, Frederick Pratt, a thatcher and farm labourer, … Read More
Deborah Painter (USA) Tiger’s eye is definitely an unusual semiprecious gem because of a phenomenon called “chatoyancy” seen in only a few minerals and stones. “Chat” is of course the French word for “cat”. The golden bands of polished specimens remind one of a cat’s eye. Chatoyancy refers to the … Read More
