REP-001 Landscape Sensitivity Assessment FINAL 130318
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The Quaternary Evolution of the Gordano Valley, North Somerset
The Quaternary Evolution of the Gordano Valley, North Somerset, UK. Thomas Charles Bernard Hill A thesis submitted in partial fulfilment of the requirements of the University of the West of England, Bristol for the degree of Doctor of Philosophy. Faculty of the Built Environment, University of the West of England, Bristol January 2006 Abstract The Gordano Valley is a low-lying valley positioned in close proximity to the Severn Estuary, in southwest England. Although its late Quaternary and Holocene sedimentary archive is extensive, the spatial and temporal evolution of the Gordano Valley has received only limited attention from previous researchers. In this study, stratigraphic analysis of the valley archive, combined with pollen, diatom and particle size analysis are utilised in a detailed reconstruction of the evolution of the Gordano Valley. Two contrasting depositional environments are present, separated by a sedimentary ridge traversing the width of the valley. A tentative mechanism is presented for the development of the ridge in response to periglacial hillslope erosion and deposition during the Devensian glacial period (c. 115,000-11,500 Cal. yrs BP). In contrast, the chronology and development of the two depositional environments is clearer. Detailed multiproxy analysis of the two sedimentary archives reveals the development of an enclosed lake basin headward of the ridge during the late glacial period (c. 18,000-15,000 Cal. yrs BP). Subsequent climatic amelioration in response to the transition from glacial to interglacial conditions resulted in the terrestrialisation of the lake at the onset of the BØlling/AllerØd interstadial, c. 15,000 Cal. yrs BP. A complete hydroseral succession sequence is present in the headward region of the valley, where the terrestrialised lake sequence developed into the fen peatland that is present today. -
Palaeolithic and Pleistocene Sites of the Mendip, Bath and Bristol Areas
Proc. Univ. Bristol Spelacol. Soc, 19SlJ, 18(3), 367-389 PALAEOLITHIC AND PLEISTOCENE SITES OF THE MENDIP, BATH AND BRISTOL AREAS RECENT BIBLIOGRAPHY by R. W. MANSFIELD and D. T. DONOVAN Lists of references lo works on the Palaeolithic and Pleistocene of the area were published in these Proceedings in 1954 (vol. 7, no. 1) and 1964 (vol. 10, no. 2). In 1977 (vol. 14, no. 3) these were reprinted, being then out of print, by Hawkins and Tratman who added a list ai' about sixty papers which had come out between 1964 and 1977. The present contribution is an attempt to bring the earlier lists up to date. The 1954 list was intended to include all work before that date, but was very incomplete, as evidenced by the number of older works cited in the later lists, including the present one. In particular, newspaper reports had not been previously included, but are useful for sites such as the Milton Hill (near Wells) bone Fissure, as are a number of references in serials such as the annual reports of the British Association and of the Wells Natural History and Archaeological Society, which are also now noted for the first time. The largest number of new references has been generated by Gough's Cave, Cheddar, which has produced important new material as well as new studies of finds from the older excavations. The original lists covered an area from what is now the northern limit of the County of Avon lo the southern slopes of the Mendips. Hawkins and Tratman extended that area to include the Quaternary Burtle Beds which lie in the Somerset Levels to the south of the Mendips, and these are also included in the present list. -
Testing the Relationship Between Marine Transgression and Evolving Island Palaeogeography Using 3D GIS: an Example from the Late Triassic of SW England
Downloaded from http://jgs.lyellcollection.org/ at University of Bristol Library on April 27, 2021 Research article Journal of the Geological Society https://doi.org/10.1144/jgs2020-158 | Vol. 178 | 2021 | jgs2020-158 Testing the relationship between marine transgression and evolving island palaeogeography using 3D GIS: an example from the Late Triassic of SW England Jack Lovegrove1, Andrew J. Newell2, David I. Whiteside1,3 and Michael J. Benton1* 1 School of Earth Sciences, University of Bristol, Bristol BS8 1TQ, UK 2 British Geological Survey, Maclean Building, Crowmarsh Gifford, Wallingford OX10 8BB, UK 3 The Natural History Museum, Cromwell Road, London SW7 5BD, UK DIW, 0000-0003-1619-747X; MJB, 0000-0002-4323-1824 * Correspondence: [email protected] Abstract: The Rhaetian transgression marked a major change in landscape. The Permian and Triassic had been a time of terrestrial conditions across Europe, including much of mainland UK, as well as the North Sea and Irish Sea, represented by red bed clastic successions. Seas flooded across Europe at 205.7 Ma and the shift from terrestrial to marine environments is marked in the UK by the switch from the red beds of the Mercia Mudstone Group to the black mudstones and shelly limestones and sandstones of the Penarth Group. The area around Bristol was marked by a complex landscape in which an archipelago of islands of Carboniferous limestone was formed in the new shallow seas. The application of new methods in geographical information systems allows a detailed exploration of a number of conformable surfaces, the unconformity between the underlying Paleozoic rocks and the overlying Mesozoic strata, as well as levels within the latest Triassic sediments, marking the advance of the sea and interactions with the coeval tectonics, which caused some islands to rise and some basins to descend. -
Chapter 3 Quaternary Environmental Change in the Gordano Valley
Chapter 3 Quaternary environmental change in the Gordano Valley 3.1 Introduction Current understanding of Pleistocene environmental change in the Bristol Channel/Severn Estuary region, summarised in Chapter 2, demonstrates that this is a region containing important evidence for past cold and temperate climates and changes in sea level, and this is reflected in the evolution of the Gordano Valley. Direct and indirect influences of a number of glacial episodes mean that Quaternary sediments of the Gordano Valley comprise a variety of unconsolidated drift that includes glacial, fluvial, littoral and estuarine beds and a mixed group of periglacial head deposits that grade into colluvium, mudflow and landslip (Green 1992). Hill et al . (2008) record the presence of a Lateglacial hydroseral succession on Weston Moor c. 15,000 Cal. BP. This was followed by deposition of estuarine alluvium and peat formation, the most extensive Quaternary deposits in the Gordano Valley, believed to have commenced around 9 ka in response to a post-glacial rise in sea level (Green 1992, Kellaway & Welch 1993, Hill 2006). This chapter provides a summary of the available literature and places the Gordano Valley into a geographical context in relation to the Pleistocene evolution of north Somerset beyond that provided in Chapter 2. The Chapter begins by summarising the geological setting of the Gordano Valley. This is followed by a review of past research relating to the Quaternary evolution of the Gordano Valley. 3.2 The solid geology of the Gordano Valley The geology of the Gordano Valley is shown in Figure 3.1. The solid geology comprises a mix of bedrock from the Devonian, Carboniferous and Permo-Triassic periods, with ages ranging from c. -
Transport of the Stonehenge Bluestones: Testing the Glacial Hypothesis
Proceedings of the British Academy, 92, 271-314 Transport of the Stonehenge Bluestones: Testing the Glacial Hypothesis J. D. SCOURSE Introduction Ir\r 1923 THOMASPUBLISHED his seminal paper on the provenance of the Stonehenge ‘bluestones’ and, in unequivocally attributing the majority of them to source outcrops in the Preseli Hills of Pembrokeshire, highlighted the improbability that the stones could have been transported to Salisbury Plain by ice (Fig. l), an hypothesis suggested earlier by Judd (1902). This led Thomas to invoke human transport, either overland or by a combined sea/overland route, from Preseli to Stonehenge, an explanation which has subsequently become widely accepted by both the archaeological and geological frater- nities: ‘There can be no question of the stones having been carried even part of the way towards southern England by ice during the Pleistocene period, and their appearance at Stonehenge can only be explained as the result of deliberate transport by man’ (Atkinson 1979, 105). In 1971, however, Kellaway highlighted a body of evidence pertaining to possible glaciation of southern England unavailable to Thomas in the 1920s, and in doing so explic- itly supported Judd’s earlier contention that the Stonehenge ‘bluestones’were glacial clasts transported from Preseli by ice and subsequently used by prehistoric man in the construc- tion of the monolith. In a series of later papers, Kellaway (Kellaway et al. 1971, 1975; Hawkins and Kellaway 1971) developed this model further, claiming extensive glaciation of not only southern England, but also of the Celtic Sea and English Channel. Despite widespread criticism of this model in the 1970s, Kellaway has recently revived the glacial hypothesis (1991a, 1991b), albeit in slightly altered form, and his earlier ideas have been invoked by another group advocating glacial transport (Thorpe et al. -
Bristol Water Drought Plan 2018 SEA Environmental Report Appendices
Bristol Water Drought Plan 2018 SEA Environmental Report Appendi ces ________________________________ ___________________ Ricardo Energy & Environment Bristol Water Drought Plan 2018 - SEA Appendices | 1 Appendix A: Figures of key interest features Appendix A is presented separately and consists of the following maps: A.1. SSSI, SPA, SAC, Ramsar and Ancient Woodland designations. A.2. AONB, NNR, LNR and National Trails. A.3. WFD waterbody classifications. A.4. WFD Groundwater Quantitative status. A.5. Agricultural Land Classification. A.6. Air Quality Management Areas. A.7. World Heritage Sites, Scheduled Monuments and Registered Parks and Gardens. A.8. Areas of Outstanding Natural Beauty and National Character Areas. Ricardo Energy & Environment Bristol Water Drought Plan 2018 - SEA Appendices | 2 Appendix B: Drought Permits – Hydrological Zone of Influence Appendix B provides the hydrological zone of influence for the Blagdon, Chew and Cheddar Reservoir drought permit options as presented within the Environmental Monitoring Report (EMP) undertaken in 2007. The figures have subsequently been updated in 2017. Ref: Ricardo/ED62546/ Ricardo Energy & Environment Bristol Water Drought Plan 2018 - SEA Appendices | 3 Figure B1: Blagdon Reservoir drought permit zone of influence [This figure has been redacted for security reasons] Ref: Ricardo/ED62546/ Ricardo Energy & Environment Bristol Water Drought Plan 2018 - SEA Appendices | 4 Figure B2: Chew Reservoir drought permit zone of influence [This figure has been redacted for security reasons] Ref: Ricardo/ED62546/ Ricardo Energy & Environment Bristol Water Drought Plan 2018 - SEA Appendices | 5 Figure B3: Cheddar Reservoir drought permit zone of influence [This figure has been redacted for security reasons] Ref: Ricardo/ED62546/ Ricardo Energy & Environment Bristol Water Drought Plan 2018 - SEA Appendices | 6 Appendix C: Consultee responses to the SEA Scoping Report Appendix C is the consultee responses to the SEA scoping report and subsequent updates to the assessment. -
Flora of Somerset
A SUPPLEMENT TO THE FLORA OF SOMERSET EDWARD SHEARBURN MARSHALL, M.A., F.L.S. RECTOR OF WEST MONKTON. Uaunton : PUBLISHED BY THE SOMERSETSHIRE ARCH^OLOGICAL AND NATURAL HISTORY SOCIETY. 1914 ; PREFACE. In these pages I have tried to record the various additions or corrections since the pubHcation of Mr. Murray's book ; which, though dated 1896, was not (I beheve) issued until early in the following year. There is a certain fitness in my continuing his work ; for we were intimate friends from the autumn of 1882 until his death, and I had a small share in his Somerset explorations : he was also my first real helper in the study of critical plants. I have generally followed the London Catalogue names and standard of species, which is somewhat more liberal than that of Fl. Som. ; Mr. Murray was accustomed to deal with larger areas, and his point of view was synthetical, rather than analytical. Researches have been carried on for many years in the north-west ; the results are embodied in Mr. J. W. White's Flora of Bristol, in my opinion quite the best and most thorough book of its kind, which appeared in 1912. He has most generously allowed me to make full use of it and—as the reader cannot fail to see—it has been my mainstay. Our friend Dr. C. E. Moss has written an important plant-associations work on the of the county ; and I wish to thank my numerous correspondents for their cordial help. The time has not yet come for a new edition of the Somerset Flora, ; several districts stiU need much closer investigation, and my own scanty leisure is so much occupied by other matters that I have been un- iv ablo to (lovoto a great deal of it to local excursions. -
North Somerset Sites and Monuments Record Bibliography
North Somerset Sites and Monuments Record Bibliography AA Abram, L. 1954 Uphill and its old church. Abram, Weston- super-Mare (rewritten and revised by A.T. Carver, 10 th edition, 1974) Acland, T.D. 1851 The farming of Somersetshire Murray Adam, J. 1978 Excavations at Lower Court Farm, Long Ashton. Clevedon and District Archaeological Society News Sheet Autumn 1978 Adam, N. 2004 Bleadon, Bleadon Moor Somerset Archaeology and Natural History 147: 204 Adam, N.J. 2005 Easton-in-Gordano, Ham Green In Somerset Archaeology Somerset Archaeology and Natural History 148: 119 Adams, J.H.L. 1938 The Weston, Clevedon and Portishead Railway. Railway Magazine 82(492): 414-423 Adams, S.B. 1925 Field work. Proceedings of the University of Bristol Spelaeological Society 2(2): 176-177 Addicott, A. et al 1986 Bygone Blagdon. Blagdon Heritage Publications, Blagdon Addison, P. 1993 Winford ochre and oxide. Journal of the Bristol Industrial Archaeology Society 26: 2-7 Affleck, G. 1843 Somersetshire Antiquities [find of Saxon coin at Weston-super-Mare]. The Westonian 4: 2 Agricola, 1840 Account of the school at Failand Lodge. Educational Magazine new series 1: 114-120 Alexander, M. 1996 Portbury Hillfort Unpublished MA course work, in SMR Alexander, M. 1996b Map regression analysis: Portbury parish Unpublished MA course work, in SMR Alexander, M. 1997 Portbury Hundred: Inter-settlement organisation in the Saxon period. Unpublished MA course work, in SMR Allan, J. 1999 Cleeve Abbey: The Pottery Somerset Archaeology and Natural History 142: 41-76 Allcroft, A.W. YEAR Earthworks of England. PUBLISHER Allen, F.J. 1905 The classification of the Somerset church towers. -
Annex B – Conditions Relating to Licensed Badger Control On
Licence Annex B: Provisions relating to licensed actions on or around Special Areas of Conservation (SACs), Special Protection Areas (SPAs), Sites of Special Scientific Interest (SSSIs), and/or Ramsar sites within the county of Avon SSSI name European Designated Licence condition Site name (where applicable) Ashton Court SSSI All vehicles must be restricted to existing tracks. Limit location of traps to existing sett footprint. Any decaying wood located within the sett footprint is to be left in situ if possible. If decaying wood must be moved then it should be moved no further than is necessary. Avon Gorge SSSI Avon Gorge Woodland All vehicles must be restricted to existing SAC tracks. Limit location of traps to existing sett footprint. Banwell Caves SSSI North Somerset & Exclude site from 1st October to 15th April. Mendip Bats SAC Banwell Ochre Caves SSSI North Somerset & No additional conditions imposed Mendip Bats SAC Barnhill Quarry No additional conditions imposed Barns Batch Spinney SSSI No additional conditions imposed Bickley Wood SSSI No additional conditions imposed Biddle Street, Yatton SSSI All vehicles must be restricted to existing tracks. Only cross at crossing points. Limit location of traps to existing sett footprint. Any decaying wood located within the sett footprint is to be left in situ if possible. If decaying wood must be moved then it should be moved no further than is necessary. Bishop's Hill Wood All vehicles must be restricted to existing tracks. Limit location of traps to existing sett footprint. Delay access until after hay cut, mid-July. Blagdon Lake All vehicles must be restricted to existing tracks. -
The Col-Gully and Glactal Deposits at Court Hill, Clevedon, Near Bristol, England
Journal of Glaciology, Vol. 20, No. 82, 1978 THE COL-GULLY AND GLACTAL DEPOSITS AT COURT HILL, CLEVEDON, NEAR BRISTOL, ENGLAND By D. D. GII.BERTSON (Department of Prehistory and Archaeology, University of Sheffield, Sheffield Sio 2TN, England) and A. B. HAWKINS (Department of Geology, University of Bristol, Bristol BS8 1TR, England) ABSTRACT. An outline is given of the Quaternary geology and geomorphology of Court Hill Col in Failand Ridge near Clevedon, Avon County, from observations made during the construction of the M5 Motorway. A glacial col-gully about 100 m wide and approximately 25 m deep is described. The col-gully, eroded through the Carboniferous Limestone, opens and deepens northward. Associated with the Col and the col-gully is a complex sequence of Quaternary deposits. Uppermost in the sequence is a layer of red sandy silt (cover sand) approximately 0.5 m thick, of periglacial origin, probably of Devensian (Weichselian) age. Largely confined to the col-gully are unstratified tills, stratified ice-contact deposits and glacio- lacustrine deltaic deposits. The glaciogenic deposits are up to 25 m thick. Boulders of about 8 Mg in weight have been observed. The geomorphology of the col-gully, and the stratification and composition of the glaciogenic deposits, demonstrate that an ice sheet at least 85 m thick had impinged against the south flank of Failand Ridge and was discharging immense quantities of water and sediment down an ice-contact slope through the Col into a small ice-marginal lake north of the col-gully. The ice sheet is regarded as being Wolstonian, or Anglian, in age.