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PRODID:-//Leeds Geological Association - ECPv6.15.16//NONSGML v1.0//EN
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METHOD:PUBLISH
X-ORIGINAL-URL:https://leedsga.org.uk
X-WR-CALDESC:Events for Leeds Geological Association
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X-PUBLISHED-TTL:PT1H
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TZID:UTC
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TZOFFSETFROM:+0000
TZOFFSETTO:+0000
TZNAME:UTC
DTSTART:20200101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20210814T133000
DTEND;TZID=UTC:20210814T170000
DTSTAMP:20260420T110719
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
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BEGIN:VEVENT
DTSTART;TZID=UTC:20210805T180000
DTEND;TZID=UTC:20210805T210000
DTSTAMP:20260420T110719
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:20260420T110719
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:20260420T110719
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
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BEGIN:VEVENT
DTSTART;TZID=UTC:20210415T191500
DTEND;TZID=UTC:20210415T211500
DTSTAMP:20260420T110719
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
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