Latest Images by Mike Simms http://www.geograph.org.uk/ 2009-11-29T01:28:02GMT text/html 2006-06-02T17:19:06GMT http://www.geograph.org.uk/profile/5537 Mike Simms 53.570042 -9.231318 http://www.geograph.org.uk/photo/178938 The bizarre karstified limestone on the shores of Lough mask has been widely used for garden - and ecclesiastical - decoration. These rocks are holey in more ways than one! text/html 2006-06-02T17:16:37GMT http://www.geograph.org.uk/profile/5537 Mike Simms 53.569076 -9.321857 http://www.geograph.org.uk/photo/178935 Limestone exposed all along the eastern shore of Lough Mask has been etched into fantastic tubes and pits by the effects of the lake water. Bizarre upward tapering tubes, called rohrenkarren, were first described from here. text/html 2006-06-02T17:12:15GMT http://www.geograph.org.uk/profile/5537 Mike Simms 53.578388 -9.291952 http://www.geograph.org.uk/photo/178933 Being perched on limestone, the water flowing from Lough Mask south to Lough Corrib has created many underground routes.In summer all of the water takes this course. This is the largest of the sinks in Castle Bay. text/html 2006-05-09T13:30:16GMT http://www.geograph.org.uk/profile/5537 Mike Simms 54.701465 -6.038920 http://www.geograph.org.uk/photo/166609 Juxtaposition of the old and the new, with the M2 motorway in the background. text/html 2006-05-09T13:28:12GMT http://www.geograph.org.uk/profile/5537 Mike Simms 54.692487 -6.039353 http://www.geograph.org.uk/photo/166608 There are any number of rather uninspiring muddy fields like this up here on the Antrim plateau. text/html 2006-04-26T17:49:23GMT http://www.geograph.org.uk/profile/5537 Mike Simms 54.393235 -8.409122 http://www.geograph.org.uk/photo/158925 Glaciers have done a lot of damage to some of the hills in Ireland... text/html 2006-04-26T17:46:28GMT http://www.geograph.org.uk/profile/5537 Mike Simms 55.160801 -6.110592 http://www.geograph.org.uk/photo/158924 Loughareema sits on chalk and has a leaky bed. But the 'plughole' is bunged with peat and so the water can only percolate slowly down into the passage below. After heavy rain the streams draining off the adjacent hills, which are of schist, overwhelm the plughole and the lake fills. text/html 2006-04-26T17:42:01GMT http://www.geograph.org.uk/profile/5537 Mike Simms 53.004991 -9.125790 http://www.geograph.org.uk/photo/158919 Lough Aleenaun is a turlough, a 'dry lake'. It comes and goes, depending on the weather. After heavy rain it is filled by springs gushing from the wooded slope on the right. . Water slowly drains away via a 'plughole', which is at the foot of the crag at the end of the curved channel. text/html 2006-04-24T14:21:33GMT http://www.geograph.org.uk/profile/5537 Mike Simms 51.584171 -2.715821 http://www.geograph.org.uk/photo/157922 On 16th October 1879 engineers driving the Severn Tunnel struck a water-filled passage 170 feet underground and 400 yards inland. The tunnel was flooded within 2 days and took 2 years to finally drain. Ever since the tunnel has been kept dry by pumping more than 23 million gallons of fresh water a day to the surface. This exceptionally pure water is used by a paper mill and brewery; what is left emerges at this outfall. text/html 2006-04-24T14:16:58GMT http://www.geograph.org.uk/profile/5537 Mike Simms 51.619670 -2.788601 http://www.geograph.org.uk/photo/157920 The Neddern Brook is known to be one of the main sources of water draining to the Severn Tunnel Great Spring. During construction of the Severn Tunnel in the 1880s, attempts were made to stem the inflow to the tunnel by lining with concrete some of the surface streams crossing the limestone. It had little effect. text/html 2006-04-24T14:13:38GMT http://www.geograph.org.uk/profile/5537 Mike Simms 51.843487 -3.721556 http://www.geograph.org.uk/photo/157918 A river drains across the moorland of the Black Mountain to sink, on reaching the limestone, at Sinc y Giedd. This is the main source of the water emerging from Dan yr Ogof caves. In dry weather the water sinks upstream of this picture. text/html 2006-04-24T14:10:16GMT http://www.geograph.org.uk/profile/5537 Mike Simms 51.610870 -2.759565 http://www.geograph.org.uk/photo/157916 Vast springs of fresh water used to emerge here on the banks of the Neddern Brook. Then on 16th October 1879 the driving of the Severn Tunnel breached a water-filled cave, flooding the tunnel and causing the Whirly Holes to dry up. All that can be seen now are two shallow depressions on either side of the river, which here is in flood. The larger, on the north bank, can be seen in front of the pair of Lombardy Poplars. text/html 2006-04-24T14:04:01GMT http://www.geograph.org.uk/profile/5537 Mike Simms 51.638533 -2.644425 http://www.geograph.org.uk/photo/157911 Much less well known than Aust Cliff, on the opposite bank of the Severn Estuary, Sedbury Cliff exposes similar late Triassic to earliest Jurassic rocks. text/html 2006-04-12T16:01:27GMT http://www.geograph.org.uk/profile/5537 Mike Simms 52.817619 -6.243456 http://www.geograph.org.uk/photo/150878 In the late 18th Century gold was discovered in this river. Peasants abandoned the fields to pan for gold until the military stepped in. In all it is thought more than 200kg of gold were found in the space of a few years but, despite extensive trenching of the adjacent hillsides, the 'mother lode' was never found. text/html 2006-04-12T14:06:27GMT http://www.geograph.org.uk/profile/5537 Mike Simms 53.542971 -6.077789 http://www.geograph.org.uk/photo/150841 Thinly bedded Carboniferous limestones and shales in the bay at Loughshinny have been spectacularly folded by tectonic activity.