Proceedings of the Geologists Association最新文献

{"title":"First record of the trace fossil Renichnus arcuatus Mayoral, 1987 in the Pliocene of Sidi Brahim (Lower Chelif Basin, NW Algeria)","authors":"Rachid Khalili ,&nbsp;Olev Vinn","doi":"10.1016/j.pgeola.2023.06.001","DOIUrl":"https://doi.org/10.1016/j.pgeola.2023.06.001","url":null,"abstract":"<div><p>A vermetid etching trace, <em>Renichnus arcuatus</em>, has been described from the outer surface of a single right valve of <em>Hyotissa hyotis</em><span><span><span> from the Lower Chelif Basin, Algeria. This is the first record of vermetid etchings from the Pliocene of the Mediterranean Sea's southern coast. The vermetids responsible for the etchings used bivalve shells as a </span>hard substrate for attachment. The vermetids used mucus nets to feed and they may have benefitted from the feeding currents of the host if they colonized a living bivalve. The </span>palaeogeography<span> of similar etching records indicates that vermetids were common in the Mediterranean region in the Pliocene.</span></span></p></div>","PeriodicalId":49672,"journal":{"name":"Proceedings of the Geologists Association","volume":"134 5","pages":"Pages 547-550"},"PeriodicalIF":1.2,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71771403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Carnian Pluvial Episode: A damp squib for life on land?","authors":"Robert A. Coram ,&nbsp;Jonathan D. Radley","doi":"10.1016/j.pgeola.2023.07.002","DOIUrl":"https://doi.org/10.1016/j.pgeola.2023.07.002","url":null,"abstract":"<div><p>The Carnian<span><span> Pluvial Episode (CPE), a 1–2 Ma interval of enhanced humidity midway through the Triassic Period, has been implicated in high levels of biotic turnover in marine environments. The Carnian stage on land also saw major faunal and floral reorganisation, including the extinction of rhynchosaurs, the diversification of dinosaurs and the origin of crocodylomorphs and mammaliaforms. An imperfect fossil record and dating uncertainties, however, make establishing a firm link to the CPE much more difficult, but the picture is gradually improving as new evidence accumulates. We review observed terrestrial biotic changes and suggest that in most cases the effects of the CPE in isolation remain ambiguous or were relatively minor or reversible. Rather, the Carnian biotic change was probably a staggered response to a number of factors, including climatic, set against the backdrop of long-term rebuilding of ecosystems following the end-Permian </span>mass extinction.</span></p></div>","PeriodicalId":49672,"journal":{"name":"Proceedings of the Geologists Association","volume":"134 5","pages":"Pages 551-561"},"PeriodicalIF":1.2,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71771400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Kula–Salihli UNESCO Geopark: Spectacular records of Quaternary volcanism, fluvial and landscape evolution and Quaternary environmental change","authors":"Ahmet Serdar Aytaç ,&nbsp;Tuncer Demir ,&nbsp;Darrel Maddy ,&nbsp;David R. Bridgland","doi":"10.1016/j.pgeola.2022.06.008","DOIUrl":"https://doi.org/10.1016/j.pgeola.2022.06.008","url":null,"abstract":"<div><p><span><span><span>The Kula–Salihli UNESCO Geopark, western Turkey, is a tectonically and volcanically active region in which the most recent eruptions of basaltic lava, associated with scoria cone formation, were during the latest Pleistocene and the </span>Holocene. Much older </span>volcanism within the same volcanic province is also in evidence, with some of the older lavas capping mesa-style uplands, such that they have preserved underlying poorly consolidated sediments that would otherwise have been lost to erosion. Beneath these hill-capping lavas, above the Neogene sediments representing endorheic basin-fill, are the early gravels of the River Gediz system, forming narrowly separated terraces (separation by a few metres) thought to have been formed in response to the ~</span> <span>41 kyrs obliquity-driven climate cycles<span> of the Early Pleistocene. The rarity of terrace preservation from this early part of the Quaternary makes this a very valuable part of the geopark, in which there is also evidence for the progressive incision into the landscape, and for periodic damming of the river system by lava eruptions, bringing about lacustrine phases that can be recognized from lake sediments and deltas that were built into the former lakes. The combination of volcanic and drainage evolutionary evidence has few if any parallels elsewhere. The geopark, which also contains sites of archaeological and historical importance, is managed sustainably in order to maximize its educational, economic, touristic and heritage value.</span></span></p></div>","PeriodicalId":49672,"journal":{"name":"Proceedings of the Geologists Association","volume":"134 4","pages":"Pages 416-431"},"PeriodicalIF":1.2,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49864451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A marine microvertebrate fauna from a temporary exposure of the Atherfield Clay Formation, Reigate, Surrey","authors":"Trevor J. Batchelor, C. Duffin","doi":"10.1016/j.pgeola.2023.08.001","DOIUrl":"https://doi.org/10.1016/j.pgeola.2023.08.001","url":null,"abstract":"","PeriodicalId":49672,"journal":{"name":"Proceedings of the Geologists Association","volume":"28 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83855015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The value of English geoconservation sites in understanding historical collections of lower and middle palaeolithic artefacts","authors":"L.C. Dale ,&nbsp;A.A. Rawlinson ,&nbsp;D.R. Bridgland ,&nbsp;M.J. White","doi":"10.1016/j.pgeola.2021.06.008","DOIUrl":"https://doi.org/10.1016/j.pgeola.2021.06.008","url":null,"abstract":"<div><p>Lower and Middle Paleolithic archaeological sites in England risk falling through the cracks between different types of heritage conservation, since they lack recognisable structures; these sites have often benefitted from protection under geoconservation, particularly through selection as Geological Conservation Review sites, and subsequent designation as Sites of Special Scientific Interest (SSSIs). The geoconservation of key sites, particularly in the formative years of British geoconservation, has allowed combined geological and archaeological reinvestigation. This is of particular benefit to understanding Lower and Middle Paleolithic artefact assemblages, which were often collected in the later 19th–earlier 20th century and consequently lacked both detailed spatial or stratigraphic provenance and contextual geological information. As such, the ‘fine grained’ data which could be gleaned from such artefact collections was limited. Here we review the benefit of geoconservation in allowing the contextualisation of historical archaeological collections, focussing on six key English sites where geological and archaeological reinvestigation has led to important archaeological findings. In particular, the emerging evidence of chronological patterning in Lower and Middle Paleolithic artefacts makes the preservation of such deposits valuable to Quaternary science in general.</p></div>","PeriodicalId":49672,"journal":{"name":"Proceedings of the Geologists Association","volume":"134 4","pages":"Pages 388-402"},"PeriodicalIF":1.2,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.pgeola.2021.06.008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49864448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A diverse trace-fossil assemblage from the Middle Jurassic (Bajocian) Teniet El Klakh Formation (western Saharan Atlas, Algeria)","authors":"Fayçal Mekki, Imad Bouchemla, Mohammed Adaci, S. Talmat, B. Ferré, M. Benyoucef","doi":"10.1016/j.pgeola.2023.07.006","DOIUrl":"https://doi.org/10.1016/j.pgeola.2023.07.006","url":null,"abstract":"","PeriodicalId":49672,"journal":{"name":"Proceedings of the Geologists Association","volume":"16 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78557662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Conserving Quaternary geoheritage in Northern Ireland","authors":"Michael Dempster ,&nbsp;Ian J. Enlander","doi":"10.1016/j.pgeola.2022.07.005","DOIUrl":"https://doi.org/10.1016/j.pgeola.2022.07.005","url":null,"abstract":"<div><p><span><span><span>Northern Ireland has a rich and varied Quaternary geoheritage. Landforms and sediments from the </span>last glacial phase of the </span>Late Pleistocene are most prevalent, though the record extends from the </span>last interglacial<span> (MIS 5e) to the Holocene. The glacial record in the region continues to play a crucial role in the development of models of the last British-Irish Ice Sheet, with many sites having international significance. It is the role of the Northern Ireland Environment Agency to legally protect and conserve this important Quaternary heritage, and a programme of statutory designation of these sites as Areas of Special Scientific Interest (ASSIs) has been in place for over twenty years. ASSIs are selected from the Pleistocene and Holocene themes of the Earth Science Conservation Review, the process through which geological sites in Northern Ireland are assessed to determine their importance to science, and so to geoconservation. This produced a significant series of reports that have contributed much to the grey and white literature for the Quaternary in the United Kingdom and Ireland. Quaternary geoheritage is recognised in the local planning system and existing and potential UNESCO Global Geoparks further serve to promote and protect this aspect of Northern Ireland's natural heritage. This paper summarises the Quaternary history of Northern Ireland, how ASSIs are selected to reflect this and how they are monitored and managed. It also considers how to ensure continued protection and recognition for Quaternary sites and features in the region.</span></p></div>","PeriodicalId":49672,"journal":{"name":"Proceedings of the Geologists Association","volume":"134 4","pages":"Pages 432-448"},"PeriodicalIF":1.2,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49864452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recognising geodiversity and encouraging geoconservation—Some lessons from Callander, Loch Lomond and The Trossachs National Park, Scotland","authors":"Eileen Tisdall ,&nbsp;Angus D. Miller","doi":"10.1016/j.pgeola.2022.08.001","DOIUrl":"https://doi.org/10.1016/j.pgeola.2022.08.001","url":null,"abstract":"<div><p><span>In the past decade progress has been made recognising the contribution that geodiversity makes to biodiversity and society. Scotland's Geodiversity Charter, launched in 2012 and revised in 2017, has attracted the support of almost 100 organisations and encourages signatories to work together to recognise the value of geodiversity and ensure it is managed appropriately and safeguarded. The case study presented here highlights that while there is a real desire to protect sites that are scientifically valuable, significant challenges exist to balance this with societal demand for resources and development. There are also challenges for geoscientists and geoconservation groups to communicate effectively with planning authorities and local communities. The case study also sheds light on the problems associated with the systems of designating </span>geosites of national and regional importance, the maintenance of these systems, and how the value of these sites is conveyed beyond the scientific community. Scotland's Geodiversity Charter offers a framework that stakeholders can use to work in partnership to increase awareness of the issues and help achieve the sustainable management of geosites. Case studies such as Callander provide lessons and solutions to overcome the challenges that arise and highlight the need for the participation of both national and local stakeholders.</p></div>","PeriodicalId":49672,"journal":{"name":"Proceedings of the Geologists Association","volume":"134 4","pages":"Pages 449-457"},"PeriodicalIF":1.2,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49864453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quaternary palaeoecology and the historic environment: Challenges and opportunities for preserving England's wetlands","authors":"Zoë Hazell ,&nbsp;Jonathan Last ,&nbsp;Gill Campbell ,&nbsp;Jane Corcoran ,&nbsp;Hannah Fluck","doi":"10.1016/j.pgeola.2022.11.002","DOIUrl":"https://doi.org/10.1016/j.pgeola.2022.11.002","url":null,"abstract":"<div><p>Palaeoecological records can provide important information on past cultural and economic activities and landscape change. Wetland sites in particular provide remarkable depository opportunities for such remains. Yet these deposit and site types are often not fully appreciated and are undervalued in terms of their place in our culture and history. This article explores reasons for this and suggests ways in which better collaboration between disciplines and sectors can be achieved. We also highlight the work that Historic England has been carrying out and funding, signposting the organisation's publications and guidance. In doing so, we demonstrate that Historic England is an advocate of wetlands and their heritage values, and is concerned with their protection, rather than only historic buildings, scheduled monuments and other designated sites, as it is commonly perceived. Through this we hope to establish partnerships and develop networks across sectors with those who are interested in wetlands, leading to better integrated working practices.</p></div>","PeriodicalId":49672,"journal":{"name":"Proceedings of the Geologists Association","volume":"134 4","pages":"Pages 458-475"},"PeriodicalIF":1.2,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49864454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Clacton-on-Sea (Essex, UK) GCR site and SSSI: New data and continuing importance","authors":"Tom S. White ,&nbsp;David R. Bridgland ,&nbsp;Peter Allen ,&nbsp;Mark J. White","doi":"10.1016/j.pgeola.2023.07.007","DOIUrl":"https://doi.org/10.1016/j.pgeola.2023.07.007","url":null,"abstract":"<div><p>The complex Geological Conservation Review (GCR) site at Clacton-on-Sea, Essex, was notified in 1986 as a Site of Special Scientific Interest. It is an internationally important geosite and Britain's only Lower Palaeolithic type locality, giving its name to the Clactonian stone-tool industry. Fossil- and artefact-bearing channel-fill deposits laid down by the River Thames ~<!--> <!-->420,000 years ago, during the Hoxnian Interglacial (Marine Isotope Stage 11c), have been observed in foreshore and cliff exposures, and beneath developed and open ground in an inland arcuate footprint. These sediments provide a record of the lower reaches and estuary of the Thames during this lengthy and warm interglacial, an important partial analogue for the Holocene. Palaeoclimatic and palaeoecological evidence has been obtained from assemblages of fossil molluscs, ostracods and vertebrates, together with pollen and plant macrofossils; Clacton is also the type locality for several of the represented animal taxa, including the biostratigraphically significant ostracod <em>Scottia browniana</em> and a large subspecies of fallow deer, <em>Dama dama clactoniana</em>. This paper provides an overview of the continuing importance of the Clacton GCR site and Site of Special Scientific Interest (SSSI), summarizing recently acquired data that have enhanced understanding of the Hoxnian and the palaeoenvironments that prevailed at the time of deposition. The wider geosite has benefitted from sustained Palaeolithic archaeological interest, with the local planning authority mandating investigation of the sediments as a condition for development projects. SSSI status ensures that the significant collections of palaeontological and archaeological material amassed from the Clacton deposits over almost two centuries can be related to their context, and studies of both these archived collections and new material from the protected <em>in situ</em> sediments continue to provide new data and contribute to the development of cutting-edge techniques.</p></div>","PeriodicalId":49672,"journal":{"name":"Proceedings of the Geologists Association","volume":"134 4","pages":"Pages 490-501"},"PeriodicalIF":1.2,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49864457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}