Published today
Ice and groundwater draw a scientific picture on the Niagara Escarpment
To most, Niagara Falls are the only reason to see the Niagara Escarpment, but to Shepley and Worthington it is a natural phenomenon that also reveals much about how water moves through the ground. They present a rare photographic feature of groundwater ice formation in their new paper published in the Quarterly Journal of Engineering Geology and Hydrogeology www.lyellcollection.org/doi/full/10.1144/qjegh2024-053
Dr Shepley and Dr Worthington are professional hydrogeologists and also undertake independent research. Both resident in the City of Hamilton, Ontario, Canada, the Escarpment is literally on their doorstep; an extremely rare groundwater observatory, potentially of global significance.
Read more in the Lyell Collection
Publish your research with the Geological Society
Are you considering options for publishing your research? The Geological Society publishes a broad range of respected Earth science journals and book series, providing geoscientists with opportunities to submit research articles, perspectives, case studies, and other scholarly papers.
To find out more about the scope of each of our publications please explore the links below.
Journals
Books
If you are ready to submit a paper visit our authors page to learn more about the process of submitting a paper and publishing with the Geological Society.
Or if you are interested in finding out about publishing Open Access visit our dedicated Open Access page.
You can contact our editorial team with any further enquiries about the range of opportunities to publish with the Geological Society [email protected]
Published today
Scottish and Irish rocks confirmed as rare record of ‘snowball Earth’
A rock formation spanning Ireland and Scotland may be the world’s most complete record of “snowball Earth”, a crucial moment in planetary history when the globe was covered in ice, finds a new study led by UCL researchers.
The study, published in the Journal of the Geological Society, found that the Port Askaig Formation, composed of layers of rock up to 1.1km thick, was likely laid down between 662 to 720 million years ago during the Sturtian glaciation – the first of two global freezes thought to have triggered the development of complex, multicellular life.
One exposed outcrop of the formation, found on Scottish islands called the Garvellachs, is unique as it shows the transition into “snowball Earth” from a previously warm, tropical environment.
Other rocks that formed at a similar time, for instance in North America and Namibia, are missing this transition.
Senior author Professor Graham Shields, of UCL Earth Sciences, said: “These rocks record a time when Earth was covered in ice. All complex, multicellular life, such as animals, arose out of this deep freeze, with the first evidence in the fossil record appearing shortly after the planet thawed.”
First author Elias Rugen, a PhD candidate at UCL Earth Sciences, said: “Our study provides the first conclusive age constraints for these Scottish and Irish rocks, confirming their global significance.
“The layers of rock exposed on the Garvellachs are globally unique. Underneath the rocks laid down during the unimaginable cold of the Sturtian glaciation are 70 metres of older carbonate rocks formed in tropical waters. These layers record a tropical marine environment with flourishing cyanobacterial life that gradually became cooler, marking the end of a billion years or so of a temperate climate on Earth.
“Most areas of the world are missing this remarkable transition because the ancient glaciers scraped and eroded away the rocks underneath, but in Scotland by some miracle the transition can be seen.”
The Sturtian glaciation lasted approximately 60 million years and was one of two big freezes that occurred during the Cryogenian Period (between 635 and 720 million years ago). For billions of years prior to this period, life consisted only of single-celled organisms and algae.
After this period, complex life emerged rapidly, in geologic terms, with most animals today similar in fundamental ways to the types of life forms that evolved more than 500 million years ago.
One theory is that the hostile nature of the extreme cold may have prompted the emergence of altruism, with single-celled organisms learning to co-operate with each other, forming multicellular life.
The advance and retreat of the ice across the planet was thought to have happened relatively quickly, over thousands of years, because of the albedo effect – that is, the more ice there is, the more sunlight is reflected back into space, and vice versa.
Professor Shields explained: “The retreat of the ice would have been catastrophic. Life had been used to tens of millions of years of deep freeze. As soon as the world warmed up, all of life would have had to compete in an arms race to adapt. Whatever survived were the ancestors of all animals.”
For the new study, the research team collected samples of sandstone from the 1.1km-thick Port Askaig Formation as well as from the older, 70-metre thick Garbh Eileach Formation underneath.
They analysed tiny, extremely durable minerals in the rock called zircons. These can be precisely dated as they contain the radioactive element uranium, which converts (decays) to lead at a steady rate. The zircons together with other geochemical evidence suggest the rocks were deposited between 662 and 720 million years ago.
The researchers said the new age constraints for the rocks may provide the evidence needed for the site to be declared as a marker for the start of the Cryogenian Period.
This marker, known as a Global Boundary Stratotype Section and Point (GSSP), is sometimes referred to as a golden spike, as a gold spike is driven into the rock to mark the boundary.
GSSPs attract visitors from around the world and in some cases museums have been established at the sites.
A group from the International Commission on Stratigraphy, a part of the International Union of Geological Sciences, visited [July 18-19] the Garvellachs in July to assess the case for a golden spike on the archipelago. Currently, the islands are only accessible by chartering a boat or by sailing or kayaking to them.
The study involved researchers from the UCL, the University of Milano-Bicocca, Italy, and Birkbeck University of London. The work was funded by the Natural Environment Research Council (NERC).
Glacially influenced provenance and Sturtian affinity revealed by detrital zircon U–Pb ages from sandstones in the Port Askaig Formation, Dalradian Supergroup
By Elias J. Rugen, Guido Pastore, Pieter Vermeesch, Anthony M. Spencer, David Webster, Adam G. G. Smith, Andrew Carter and Graham A. Shields
Read the paper in full in the Lyell Collection by clicking here
Key moment in the evolution of life on Earth captured in fossils
Research published in the Journal of the Geological Society has for the first time precisely dated some of the oldest fossils of complex multicellular life in the world, helping to track a pivotal moment in the history of Earth when the seas began teeming with new lifeforms - after four billion years of containing only single-celled microbes.
Lead author PhD student Anthony Clarke, from the Timescales of Mineral Systems Group within Curtin’s School of Earth and Planetary Sciences, said to determine the age of the fossils, researchers used volcanic ash layers like bookmarks in the geological sequence.
“Located in the Coed Cochion Quarry in Wales, which contains the richest occurrence of shallow marine life in Britain, we used outfall from an ancient volcano that blanketed the animals as a time marker to accurately date the fossils to 565 million years, accurate down to 0.1 per cent,” Mr Clarke said.
“With similar Ediacaran fossils found at sites around the world including in Australia, dating the fossils identifies them as being part of an ancient living community that developed as Earth thawed out from a global ice age.
“These creatures would in some ways resemble modern day marine species such as jellyfish, yet in other ways be bizarre and unfamiliar. Some appear fern-like, others like cabbages, whereas others resembled sea pens.”
Study co-author Professor Chris Kirkland, also from the Timescales of Mineral Systems Group at Curtin, said the fossils are named after the Ediacara Hills in South Australia’s Flinders Ranges, where they were first discovered, leading to the first new geological period established in over a century.
“These Welsh fossils appear directly comparable to the famous fossils of Ediacara in South Australia,” Professor Kirkland said.
“The fossils, including creatures like the disc-shaped Aspidella terranovica, showcase some of the earliest evidence of large-scale multicellular organisms, marking a transformative moment in Earth’s biological history.
“Ediacaran fossils record the response of life to the thaw out from a global glaciation, which shows the deep connection between geological processes and biology.
“Our study underscores the importance of understanding these ancient ecosystems in order to unravel the mysteries of Earth’s past and shape our comprehension of life’s evolution.”
The full research paper, ‘U–Pb zircon-rutile dating of the Llangynog Inlier, Wales: constraints on an Ediacaran shallow 1 marine fossil assemblage from East Avalonia’ was published in the Journal of the Geological Society and can be found online here
About the Journal of the Geological Society (JGS)
JGS publishes topical, innovative and interdisciplinary research with global reach across the full range of Earth and planetary sciences. Regional geological studies of interest to our international readership are also welcomed. Each year JGS presents the ‘JGS Early Career Award' for papers published in the journal, which rewards the writing of well-written, exciting papers from early career geologists. The journal publishes research and invited review articles, discussion papers and thematic collections.
Find out more about the Journal of the Geological Society
American Geophysical Union (AGU) and the Geological Society partner on new Open Science book series
AGU has partnered with the Geological Society of London to launch a new Open Science book series called GeoHorizons, which focuses on critical topics in the geosciences.
GeoHorizons
Earth, space, and planetary research for a sustainable future
The focal point is solution-based science that addresses the many challenges facing humanity and the environment from a geosciences perspective. The books are intended to feature the work of scientists across demographics, geographic locations, professional backgrounds and career stages.
“AGU is thrilled to partner with the Geological Society on a book series devoted to sharing insights and solutions from the geosciences community,” said Matthew Giampoala, AGU’s vice president of publications. “Our shared commitment to making content Open Access will help to ensure a free-flowing exchange of information and insights that will catalyze progress in the field and, ultimately, change the world for the better.”
“We are delighted to work alongside AGU on a brand-new Open Science book series that supports our shared goal of advancing Earth and planetary science solutions to global societal challenges,” said Maggie Simmons, director of publishing at the Geological Society. “Open research and collaboration are key to our mission to accelerate scientific progress, promote innovation and increase engagement with science.”
AGU and the Geological Society will collaborate on commissioning new titles and marketing published volumes. The Geological Society Publishing House will provide an end-to-end publishing service, including editorial management, peer review, content hosting and distribution.
“We believe that books remain a valuable means of collating and presenting scientific material,” said Kate Lajtha, editor-in-chief of AGU Books. “In a book you have the space and freedom to present a complete narrative about a topic and bring together different perspectives and content types that would otherwise need to be published in multiple journals. This new opportunity to publish open access books will enable more people to access exciting scientific material.”
Propose a volume
Proposals for this new series are welcomed. Find out more here
About
AGU is a leading scientific publisher with 24 peer-reviewed journals covering the range of Earth and space sciences, from space weather to tectonics and water resources. To date, 12 journals are fully open access, with the other journals slated for transition in the coming years. A book publisher since 1956, AGU also has more than 700 titles to its credit for the purposes of research, learning, teaching and professional development. GeoHorizons is AGU’s first book publishing partnership intended primarily for Open Access.
Founded in 1807, the Geological Society is the oldest geological society in the world and a world-leading communicator of Earth science through scholarly publishing, library and information services, cutting-edge scientific conferences, education activities and outreach to the general public. The Society is one of the largest Earth science book publishers globally. Research from a global authorship is published across eight journals and several well-known book series and is hosted via the Lyell Collection.
Join our mailing list
Sign up here