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UID:98@cumberland-geol-soc.org.uk
DTSTART;TZID=Europe/London:20240928T103000
DTEND;TZID=Europe/London:20240928T103000
DTSTAMP:20240905T041434Z
URL:https://www.cumberland-geol-soc.org.uk/events/marginalia-of-the-northu
 mberland-solway-basin-in-north-cumbria-and-scotland/
SUMMARY:Marginalia of the Northumberland-Solway Basin in North Cumbria and 
 Scotland
DESCRIPTION:Leader: Steve Rozario\n\n2024 CGS Excursion Register Solway Bas
 in\n\n2024 CGS Event Information Solway Basin\n\nThis excursion is based o
 n the BGS publication “Geology in South West Scotland”\nEdited P. Ston
 e\, 1996\, and is an abbreviated version of Excursion 1 - Langholm and Can
 onbie.\niv We will be visiting locations 3\, 4 and 6 from this excursion g
 uide. There are full geology notes for the locations in this guide\, avail
 able free online\, which are not reproduced here.\n\n\n\nPenton Linns\n\n\
 n\nLogistics\nLocation 1\nMeet 10.00 for 10.30 Charles Street Car Park\, L
 angholm\, Grid reference\nNY 362 844\, Postcode DG13 0AA\n\nLangholm is on
  the A7 north of Carlisle\, just over an hour’s drive from Keswick. From
  Keswick take the A66 east towards Penrith\, join the M6 heading north at 
 junction 40.\nExit the M6 at junction 44 and take the A7 north towards Lon
 gtown. Stay on the A7 past Longtown until you reach Langholm. Just after t
 he narrow single lane section in\nthe town centre bear left and then turn 
 left to reach the Charles Street car park.\nRefreshments and toilets are a
 vailable in Langholm town centre where there is also free short term disk 
 parking. Pelosi’s Corner café is recommended for early arrivals\nor tho
 se wanting a late breakfast.\nWe will assemble in Charles Street Car Park 
 at 10.30 for the 2 mile loop walk to Skipper’s Bridge (there is no safe 
 parking for a group of cars at Skipper’s Bridge\, and\nthe riverside wal
 k is pleasant).\nAt Skipper’s Bridge we will look at exposures of the Si
 lurian greywacke basement\, presumed to extend under the Northumberland-So
 lway Basin\, the basin margin fault and early Carboniferous Birrenswark la
 vas from the extension-rifting phase – the birth of the basin.\nWe aim t
 o return to Charles Street Car Park by 12.30 for the short drive to Penton
 \nBridge.\n\n12.30 to 12.50 drive to Penton Bridge.\n\nFrom Charles Street
  Car Park follow the one way system round to rejoin the A7 turning right t
 o head south. At the traffic lights at Skippers Bridge turn left on the B6
 318 towards Penton. Follow the B6318 taking care to turn left at Claygate 
 and then left and right at Harelaw where the road descends to the Liddel W
 ater. There is\nparking for 3-4 cars in the layby on the left before the b
 ridge\, and for several more cars on the roadside on the right past the br
 idge.\nLocation 2\nPenton Bridge\, Grid Reference NY 432 774\, Postcode CA
 6 5QU.\n12.50 to 15.50 we will explore this scenic geological SSSI to look
  at the Carboniferous Yoredale cycles\, with fossiliferous limestones\, mu
 dstones\, siltstones\,\nsandstones and coals. We will also explore the bas
 in inversion fold and faults visible here. We will have lunch en route.We 
 return to the cars at 15.50 for the short drive to Canonbie.\n15.50 to 16.
 00 drive to Canonbie.\nWe return on the B6318 to Harelaw where we turn lef
 t on the B6357. We pass through Rowanburn\, with it’s visible coal minin
 g history. On entering Canonbie we\nturn left at the signal-controlled bri
 dge before crossing the River Esk signposted Canonbie churchyard. Follow t
 his road towards the church\, turning right at the\ncemetery where there i
 s parking for several cars. If this parking area is full there is more par
 king on the other side of the bridge in Canonbie at the village hall.\nLoc
 ation 3\nCanonbie Church\, Grid Reference NY 394 763\, Postcode DG14\n0RA.
 \n16:00 to 17:00 we walk past ‘Dead Neuk’\, scene of a tragic ferry ac
 cident in 1696 when 28 church-goers were drowned in a flood\, and along th
 e riverside. On the far\nbank we can see Permian desert sandstones\, the p
 ost-basin deposits.\nWe continue along the river bank to a small bluff whe
 re there is an exposure of late Carboniferous red-beds (the Canonbie Bridg
 e sandstone). These are described in a\nrelatively recent BGS report “Th
 e stratigraphy and sedimentology of Upper Carboniferous Warwickshire Group
  red-bed facies in the Canonbie area of SW\nScotland” Jones and Holliday
  2006.v These rocks are “probably typical of what covered most of northe
 rn England prior to late Carboniferous folding and uplift”\nvi according
  to the British Regional Geology guide to Northern England\, so represent 
 the final deposits in the Northumberland-Solway Basin.\n\n\n\ni https://do
 i.org/10.1016/0012-821X(78)90071-7\nii https://doi.org/10.1144/gsl.sp.1989
 .044.01.20\niii https://webapps.bgs.ac.uk/Memoirs/docs/B06816.html\niv htt
 ps://earthwise.bgs.ac.uk/index.php/Geology_in_south-west_Scotland:_an_excu
 rsion_guide.\nv https://nora.nerc.ac.uk/id/eprint/7191/1/IR06043.pdf\nvi h
 ttps://earthwise.bgs.ac.uk/index.php/Warwickshire_Group\,_Carboniferous\,_
 Northern_England
LOCATION:Langholm\, Charles Street Car Park\, Langholm\, DG13 0AA\, United 
 Kingdom
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Charles Street Car Park\, L
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