A local diversion for light vehicles follows the limestone gorge of Winnats Pass. A short tunnel could readily have been made avoiding the landslip zone, but the opportunity to exclude heavy business and lorry traffic from the middle of the National Park was preferred. Layers of tarmac and gravel are up to 6 feet thick in places, demonstrating the numerous efforts to keep the road open. The road was built at the beginning of the 1800s and was subsequently relaid until local authorities closed it in 1979. Įvidence for the continued movement of the slide mass is demonstrated graphically by the severe damage to the old Mam Tor road that traversed this flow. Indeed, three larger landslips occur on the north side of Mam Tor, one of them cutting the main ridge at Mam Nick which allows a minor road over into Edale another creates the striking crag of Back Tor well seen from Mam Tor. The landslide is due to weak shales underlying sandstones, a common phenomenon all around the Dark Peak, notably at Alport Castles, Longdendale, Glossop, and Canyards Hills, Sheffield. This rotational landslide began roughly 4,000 years ago. On days where visibility is impaired by cloud, mist, rain or fog, some landmarks used as direction aids in the route descriptions may not be visible.The most notable feature of Mam Tor is the active landslip which invades its southeast side almost to the summit, and interrupts the ramparts of the hillfort, unless its builders used it as part of the defences. Wet weather can also cause some streams and rivers to become impassable. Paths described may be pleasant for walking in fine weather, but can become slippery, boggy and dangerous in wet and wintry weather. Hedges, footpaths and fences can be moved and redirected. Any reliance you place on such information is therefore strictly at your own risk. In no way shall Julia Bradbury, The Outdoor Guide or AccessTOG be liable for any direct, indirect, punitive, or consequential damages arising out of, or in any way connected with the use of the information contained in or the activity described within this website. While every effort is taken to ensure that the routes shared through The Outdoor Guide & AccessTOG website, social media and videos are correct, we can in no way guarantee the routes to be 100% free of errors.
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