The power of running water is very evident along the River North Esk. The impressive gorge downstream of Rosslyn Castle was eroded by water from melting ice a few thousand years ago, but rivers also flowed here in Carboniferous times, forming the local sedimentary rocks.

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Excursion title: Geology of Roslin Glen – Midlothian Outdoor Festival
Date & time: Sunday 11 August, 2019 11am Finish time: 2 pm
Leaders: Angus Miller Lothian and Borders GeoConservation
Excursion aims and description: The power of running water is very evident along the River North Esk. The impressive gorge downstream of Rosslyn Castle was eroded by water from melting ice a few thousand years ago, but rivers also flowed here in Carboniferous times, forming the local sedimentary rocks.
Transport: public transport / cars
Meeting point: Outside Rosslyn Chapel Visitor Centre, Roslin EH25 9PU
First locality:
Excursion route: Down into the gorge of the River North Esk then following the river upstream, past Rosslyn Castle and to the gunpoder works in Roslin Glen.
Terrain, walking distance, height gain: 5 km on paths that can be muddy in places, with steps. Route map on plotaroute.com.
Specific or Medium- / High-Risk Hazards: None
Control measures required to mitigate against any Hazards referred to above: None
Hard hats or Hi-viz clothing needed: No
May dogs be brought on the excursion? Yes
Toilet information: At Rosslyn Chapel (entrance fee)
Geological map sheet: 32 E Edinburgh
OS map sheet: Landranger 66 Edinburgh
References: LBGC leaflet – Esk Valley, available from https://www.edinburghgeolsoc.org/publications/geoconservation-leaflets/