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X-WR-CALDESC:Events for Leeds Geological Association
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BEGIN:VEVENT
DTSTART;TZID=UTC:20220621T190000
DTEND;TZID=UTC:20220621T210000
DTSTAMP:20260417T092715
CREATED:20220429T185905Z
LAST-MODIFIED:20220429T191921Z
UID:5290-1655838000-1655845200@leedsga.org.uk
SUMMARY:Almscliff Crag - 21 June
DESCRIPTION:Evening field visit. \nField visit leader – Cris Little\, Leeds University.
URL:https://leedsga.org.uk/event/almscliff-crag-cris-little-leeds-university-21-june/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20220528T100000
DTEND;TZID=UTC:20220528T150000
DTSTAMP:20260417T092715
CREATED:20220429T185523Z
LAST-MODIFIED:20220429T190849Z
UID:5286-1653732000-1653750000@leedsga.org.uk
SUMMARY:Geology of Gorpley Clough - 28 May
DESCRIPTION:Field visit leader – Gareth Martin\, LGA.
URL:https://leedsga.org.uk/event/geology-of-gorpley-clough-gareth-martin-lga-28th-may/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20220519T191500
DTEND;TZID=UTC:20220519T203000
DTSTAMP:20260417T092715
CREATED:20220428T193046Z
LAST-MODIFIED:20220428T193204Z
UID:5275-1652987700-1652992200@leedsga.org.uk
SUMMARY:The Oklo natural nuclear reactors
DESCRIPTION:The Oklo natural nuclear reactors\nDr Gareth Martin\, Leeds Geological Association \n \nGeology has many weird and wonderful curiosities\, probably none more so than the Oklo natural nuclear reactors. Back in December 1942 humans created what was then thought to be the first controlled nuclear chain reaction on Earth. This thought persisted until 1972 when some unusual measurements in the concentration of uranium extracted from a uranium mine in the Gabon\, Africa was identified at a reprocessing plant in France. Initially\, it was thought that the uranium had been stolen but some scientific investigations and old hypotheses led to an amazing discovery which showed that nature beat us to controlled fission reactions by 1.9 billion years. This talk will give an overview of the story of the discovery and operation of these natural nuclear reactors as well as providing an insight into the fascinating\, and surprisingly abundant\, element which is Uranium. \nJoining instructions: \nNon-members are welcome to join the talk\, which will be delivered via Microsoft Teams. To obtain the joining link\, Email the LGA Secretary (lga.sec@btinternet.com) no later than 24 hours before the talk is due to start. \nThe joining link will be sent out on the day of the talk.
URL:https://leedsga.org.uk/event/the-oklo-natural-nuclear-reactors/
LOCATION:This meeting will be delivered remotely via Microsoft Teams
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20220430T100000
DTEND;TZID=UTC:20220430T160000
DTSTAMP:20260417T092715
CREATED:20220429T185259Z
LAST-MODIFIED:20220429T190542Z
UID:5281-1651312800-1651334400@leedsga.org.uk
SUMMARY:Geology of Knaresborough Gorge - 30 April
DESCRIPTION:Field visit leader – Bill Fraser\, LGA.
URL:https://leedsga.org.uk/event/30-april-geology-of-knaresborough-gorge-bill-fraser-lga/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20220331T191500
DTEND;TZID=UTC:20220331T203000
DTSTAMP:20260417T092715
CREATED:20220322T195632Z
LAST-MODIFIED:20220322T200020Z
UID:5264-1648754100-1648758600@leedsga.org.uk
SUMMARY:The origin and early evolution of land plants
DESCRIPTION:The Origin and early evolution of land plants \nDr Charles Wellman\, School of Biosciences\, University of Sheffield \n \nThe origin of land plants was one of the most important events in the history of life on Earth. It is of immense evolutionary significance as it represents the origin of one of the three kingdoms of multicellular life. It is also significant in terms of the environment of planet Earth\, as the origin and subsequent evolution of terrestrial vegetation had profound influence on biogeochemical cycles\, effecting atmospheric composition and climate\, patterns of weathering\, erosion and sedimentation\, soil formation etc. In view of its overwhelming significance\, research into the origin and early evolution of land plants has been a long standing scientific concern. It embraces many fields including the study of extant plants\, fossil plants and past environments. This talk will consider the fossil record of the earliest land plants. It will summarize our current understanding of the ‘invasion of the land by plants’ based on a consideration of a number of exceptionally preserved biotas. This tells the story about how the earliest diminutive plants\, that colonised small patches of damp ground in the Mid Ordovician\, evolved into forests that colonised much of the planet surface by the Mid Devonian. \nJoining instructions: \nNon-members are welcome to join the talk\, which will be delivered via Microsoft Teams. To obtain the joining link\, Email the LGA Secretary (lga.sec@btinternet.com) no later than 24 hours before the talk is due to start. \nThe joining link will be sent out on the day of the talk.
URL:https://leedsga.org.uk/event/the-origin-and-early-evolution-of-land-plants-dr-charles-wellman/
LOCATION:This meeting will be delivered remotely via Microsoft Teams
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20220303T191500
DTEND;TZID=UTC:20220303T203000
DTSTAMP:20260417T092715
CREATED:20220302T074317Z
LAST-MODIFIED:20220302T080313Z
UID:5259-1646334900-1646339400@leedsga.org.uk
SUMMARY:The geological evolution of natural resources in Yorkshire - what contribution to the energy transition?\, Nick Shaw
DESCRIPTION:Its over 200 years since William Smith and his nephew John Phillips started to document the lay of the land and publish geological maps. However\, before that the Romans and later the monks\, miners and canal builders had used their knowledge and experience to develop the natural resources of the region. In addition\, gentleman geologists\, then academics and industrial scientists have built-up our knowledge. In 1974 the Yorkshire Geological Society published the classic “The geology and mineral resources of Yorkshire” edited by Rayner and Hemingway. In the intervening period and up till present day\, many new insights and understandings have developed in geology\, how the earth works and how human activity has influenced the planet’s climate\, including recognition of the Anthropocene. More recently the coal mining industry has closed-down and onshore hydrocarbon exploration and production has had a limited purchase\, and even less social acceptance.  \nDespite the relatively gentle stratal dips to the south-east or east\, the geological history of Yorkshire is punctuated by three major unconformities which record the major phases of development. There is an underlying tectonic fabric which controls the basin development and sediment provenance\, focus of heat flow\, thermal maturity\, mineralization and fluid movements. Recent studies indicate that the opening of the Atlantic and associated igneous doming and dykes has helped shaped the outcrop pattern\, including the offshore. \nCoal\, iron\, lead\, zinc\, salt and hydrocarbon deposits have long been developed. Now\, some of these legacy industrial assets might even be repurposed as sources of geothermal heat and/or storage\, seasonal gas storage\, sequestration of CO2 or nuclear waste repositories.  \nPerhaps it’s time to rethink our approach to natural resources and see what contribution to the energy transition it is possible for them to make? \nJoining instructions: \nNon-members are welcome to join the talk\, which will be delivered via Microsoft Teams. To obtain the joining link\, Email the LGA Secretary (lga.sec@btinternet.com) no later than 24 hours before the talk is due to start. \nThe joining link will be sent out on the day of the talk.
URL:https://leedsga.org.uk/event/the-geological-evolution-of-natural-resources-in-yorkshire-what-contribution-to-the-energy-transition/
LOCATION:This meeting will be delivered remotely via Microsoft Teams
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/London:20220203T191500
DTEND;TZID=Europe/London:20220203T203000
DTSTAMP:20260417T092715
CREATED:20220122T110107Z
LAST-MODIFIED:20220122T110230Z
UID:5048-1643915700-1643920200@leedsga.org.uk
SUMMARY:The Geology of Islay\, David Webster
DESCRIPTION: The Geology of Islay\, David Webster. \n  \n \nThe Islay archipelago has a great variety of geology: 2-billion-year old gneisses of the Rhinns Complex\, a lightly metamorphosed late-Precambrian sedimentary succession including the world-famous Port Askaig Tillite deposited by ice during the time of a ‘Snowball Earth’\, lead mines\, and igneous rocks from the Silurian\, Carboniferous and Palaeocene. Pleistocene glacial features abound\, and a recent archaeological dig has found evidence of probably the earliest human occupation of Scotland with ice-age hunters living on Islay some 12\,000 years ago. Oh\, and we have some nice whiskies too – many with geological stories to tell. \nJoining instructions: \nNon-members are welcome to join the talk\, which will be delivered via Microsoft Teams. To obtain the joining link\, Email the LGA Secretary (lga.sec@btinternet.com) no later than 24 hours before the talk is due to start. \nThe joining link will be sent out on the day of the talk.
URL:https://leedsga.org.uk/event/5048/
LOCATION:This meeting will be delivered remotely via Microsoft Teams
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20211209T191500
DTEND;TZID=UTC:20211209T210000
DTSTAMP:20260417T092715
CREATED:20210518T055904Z
LAST-MODIFIED:20210518T055904Z
UID:4729-1639077300-1639083600@leedsga.org.uk
SUMMARY:AGM and Conversazione
DESCRIPTION:
URL:https://leedsga.org.uk/event/agm-and-conversazione/
LOCATION:Rupert Beckett Lecture Theatre\, University of Leeds Campus\, Leeds\, LS2 9DA\, United Kingdom
CATEGORIES:Other events
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20211104T191500
DTEND;TZID=UTC:20211104T210000
DTSTAMP:20260417T092715
CREATED:20210518T055802Z
LAST-MODIFIED:20211017T192122Z
UID:4727-1636053300-1636059600@leedsga.org.uk
SUMMARY:Exceptional Preservation of Dinosaur Eggs and Embryos from the Cretaceous of China and Argentina. Dr John Nudds\, Manchester University
DESCRIPTION:Exceptional Preservation of Dinosaur Eggs and Embryos from the Cretaceous of China and Argentina. Dr John Nudds\, Manchester University \n \nDinosaur eggs have been known for almost 100 years\, but it is still exceptionally rare to find eggs containing any remains of their tiny embryos. I have been directing an international team of specialists which has used ground-breaking techniques to reveal these delicate fossils. Embryos from China have been identified with the enigmatic group of dinosaurs\, the therizinosauroids\, and the embryos have revealed much about the anatomy and affinities of these peculiar animals. Those from Argentina proved to belong to the titanosaurs\, some of the largest dinosaurs ever to have walked on Earth. Their tiny skulls\, not much more than a centimetre in length\, have revealed some surprises! \nJoining instructions: \nNon-members are welcome to join the talk\, which will be delivered via Microsoft Teams. To obtain the joining link\, Email the LGA Secretary (lga.sec@btinternet.com) no later than 24 hours before the talk is due to start. \nThe joining link will be sent out on the day of the talk.
URL:https://leedsga.org.uk/event/dinosaur-eggs-and-embryos-dr-john-nudds-manchester-university/
LOCATION:This meeting will be delivered remotely via Microsoft Teams
CATEGORIES:Lectures
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20211007T191500
DTEND;TZID=UTC:20211007T210000
DTSTAMP:20260417T092715
CREATED:20210518T055649Z
LAST-MODIFIED:20211003T185602Z
UID:4724-1633634100-1633640400@leedsga.org.uk
SUMMARY:Volcanoes from Space: satellite measurements of magma.    Dr Susannah Ebmeier Leeds University SEE
DESCRIPTION:Dr. Ebmeier investigates different aspects of volcanic activity using satellite remote sensing. In particular\, she studies the physical processes that control the character of volcanic activity\, including magma storage\, edifice growth & collapse\, and volcanic interactions. An important aspect of the research using satellite imagery is exploring how it can be made useful for volcano monitoring and assessing volcanic hazards. The impact of volcanic gases on the Earth’s environment is also part of the research. \nPlease note\, this meeting will be virtual meeting held via Microsoft Teams. To obtain the joining link for this talk please contact the Secretary via lga.sec@btinternet.com
URL:https://leedsga.org.uk/event/volcanoes-from-space-satellite-measurements-of-magma-dr-susannah-ebmeier-leeds-university-see/
LOCATION:This meeting will be delivered remotely via Microsoft Teams
CATEGORIES:Lectures
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20211001
DTEND;VALUE=DATE:20211004
DTSTAMP:20260417T092715
CREATED:20210618T112048Z
LAST-MODIFIED:20210618T112153Z
UID:4958-1633046400-1633305599@leedsga.org.uk
SUMMARY:‘Alston Residential’ Field Visit (fully booked)
DESCRIPTION:
URL:https://leedsga.org.uk/event/alston-residential-fully-booked/
CATEGORIES:Field Visits
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20210911T103000
DTEND;TZID=UTC:20210911T170000
DTSTAMP:20260417T092715
CREATED:20210618T112014Z
LAST-MODIFIED:20210618T112225Z
UID:4956-1631356200-1631379600@leedsga.org.uk
SUMMARY:‘Butterly Cutting and Pule Hill’. (Marsden) Field Visit Leader: Gareth Martin
DESCRIPTION:
URL:https://leedsga.org.uk/event/butterly-cutting-and-pule-hill-marsden-leader-gareth-martin/
CATEGORIES:Field Visits
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20210814T133000
DTEND;TZID=UTC:20210814T170000
DTSTAMP:20260417T092715
CREATED:20210618T111913Z
LAST-MODIFIED:20210618T112205Z
UID:4954-1628947800-1628960400@leedsga.org.uk
SUMMARY:‘Ponden Clough’. (Howarth). Field Visit.  Leader: Gareth Martin
DESCRIPTION:
URL:https://leedsga.org.uk/event/ponden-clough-howarth-leader-gareth-martin/
CATEGORIES:Field Visits
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20210805T180000
DTEND;TZID=UTC:20210805T210000
DTSTAMP:20260417T092715
CREATED:20210618T111839Z
LAST-MODIFIED:20210618T112236Z
UID:4952-1628186400-1628197200@leedsga.org.uk
SUMMARY:St Chad’s Church\, Far Headingley. Graveyard tour’. Field Visit Leader: John Varker
DESCRIPTION:
URL:https://leedsga.org.uk/event/st-chads-church-far-headingley-graveyard-tour-leader-john-varker/
CATEGORIES:Field Visits
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20210710T103000
DTEND;TZID=UTC:20210710T170000
DTSTAMP:20260417T092715
CREATED:20210618T111758Z
LAST-MODIFIED:20210618T111758Z
UID:4950-1625913000-1625936400@leedsga.org.uk
SUMMARY:Rocks and landscape to the east of Leeds’. (Thorpe Park\, Garforth\,  Micklefield\, Aberford)  Leader: Bill Fraser
DESCRIPTION:
URL:https://leedsga.org.uk/event/rocks-and-landscape-to-the-east-of-leeds-thorpe-park-garforth-micklefield-aberford-leader-bill-fraser/
CATEGORIES:Field Visits
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20210701T173000
DTEND;TZID=UTC:20210701T203000
DTSTAMP:20260417T092715
CREATED:20210618T111631Z
LAST-MODIFIED:20210618T112246Z
UID:4947-1625160600-1625171400@leedsga.org.uk
SUMMARY:‘Otley Chevin Geology Trail’. Field Visit  Bill Fraser & Gareth Martin
DESCRIPTION: (This is part of the Otley Walking Festival programme and aimed at the general public as well    as LGA members. It is one that we hope will attract ‘interested people’ who may then be encouraged to join us. The event will operate under the OWF requirements (see https://otleywalkingfestival.co.uk/ for details) and will start from East Chevin Quarry car park at 5.30 pm. 
URL:https://leedsga.org.uk/event/otley-chevin-geology-trail-bill-fraser-gareth-martin/
CATEGORIES:Field Visits
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20210415T191500
DTEND;TZID=UTC:20210415T211500
DTSTAMP:20260417T092715
CREATED:20210409T123943Z
LAST-MODIFIED:20210409T125149Z
UID:4469-1618514100-1618521300@leedsga.org.uk
SUMMARY:A Re-evaluation of Glacial Lake Pickering
DESCRIPTION:During the Quaternary\, repeated glacial cycles left widespread deposits across Britain. These deposits hold an archive of terrestrial responses to changes in climate over the last 2.6 Ma. One such archive is the Vale of Pickering in North Yorkshire: a low-lying depression bounded on all sides save the east end by large hills comprised of Jurassic and Cretaceous bedrock. During the Late Quaternary\, this natural basin was blocked by ice sheets forming large proglacial lakes. To understand the advance and retreat of the surrounding ice lobes in the Vale of York to the west and the North Sea Lobe to the east -the deposits of the Vale of Pickering are crucial; however\, limited work in the area has failed to ascertain an accurate history of Lake Pickering. Using newly available high-resolution LiDAR data\, field observations\, historic borehole records\, and optically stimulated luminescence (OSL) dating\, a new chronological model for Lake Pickering has been established. This shows that 1) previously estimated lake levels are too high and that during the LGM\, Lake Pickering was no more than 33 m O.D. 2) Ice invaded the eastern coast of the Vale of Pickering on more than one occasion\, potentially earlier than the LGM. 3) Several iterations of Lake Pickering exist with a lake during the LGM\, but at least one older than 30 ka. 4) The drainage of Lake Pickering is very complex and seaward drainage likely prevailed until the eastern end became blocked by continued deposition of glacial material. This reversed the drainage through the Kirkham Gorge. 5) The use of newer geoscientific techniques like OSL and LiDAR mapping are crucial to the understanding of the palaeoenvironment of the Vale of Pickering and the continued development of these techniques are vital to further work. \nThis talk will be delivered via Microsoft Teams. Joining instructions will be circulated to members nearer the date. Non-members are welcome to attend and should email the Secretary at lga.sec@btinternet.com no later than 24 hours before the scheduled start time\, to request joining instructions.
URL:https://leedsga.org.uk/event/a-re-evaluation-of-glacial-lake-pickering/
LOCATION:This meeting will be delivered remotely via Microsoft Teams
CATEGORIES:Lectures
ORGANIZER;CN="Dr Laura Eddey%3A  University of Sheffield":MAILTO:lga.sec@btinternet.com
END:VEVENT
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