A Question of Nine Number Picture Boards

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Slide 1

'A Question of' … Nine Number Picture Boards This nine number picture board is adjusted from a layout accessible from www.sln.org.uk/geology Click a number to connection to a picture Click the picture to connection to a data page Click the yellow square to interface back to the picture Click the red square to connect back to the photo board Once chose, numbers will change shading

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A Question of Limestone 1 2 3 4 5 6 8 9 7

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1 What is this element and how was it shaped? How can it turn into this?

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2 Why is there no indication of the stream which dissolved this valley?

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3 Image delivered from the OS Get-a-Map benefit. Picture imitated with kind authorization of the OS and OS of Northern Ireland What delineate recommends the region is underlain by limestone?

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4 This is the biggest known case in the UK. What is it and how was it framed?

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5 This is the highest point of Britain's most elevated waterfall. Why is it seen by not very many individuals?

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6 What components of the structure of carboniferous limestone are noticeable in this photograph?

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7 Why is the main limestone obvious in this photo underneath the enormous rock?

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8 What is occurring here? Look at photograph 5.

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9 What are these shallow roundabout dejections?

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This is limestone asphalt . After ice sheets had scoured the stone, it was presented to substance weathering by somewhat acidic water. This expanded the joints in the stone to frame grykes . The squares of shake between the grykes are called clints . clint Where water has lain in pools on the clints, there are arrangement hollows and where water has streamed off the clints, there are channels called runnels. runnel gryke Solution hollows After delayed weathering, the asphalt will disintegrate until it looks like the second photograph on Slide 1.

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This is a dry valley . In spite of the fact that it has a "V" formed cross area and was obviously dissolved by water, there is no waterway streaming in it at present. Toward the end of the Ice Age when ice hindered all the underground sections in the stone, the limestone turned out to be briefly impermeable. Meltwater needed to stream over the surface and cut valleys, for example, Watlowes in the photograph. After the ground defrosted, water could advance underground again and the valley was left dry.

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irregular waste limestone asphalt swallow opening chasm

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This is Britain's biggest stalactite : the supposed Sword of Damocles in Ingleborough demonstrate give in. Stalactites frame in underground buckles where water rich in broke up calcium carbonate trickles from joints crossing the natural hollow rooftop. Vanishing of the water brings about the affidavit of a small measure of calcite. This procedure, rehashed over quite a while, produces a stalactite.

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When Fell Beck vanishes underground at this swallow gap which is known as Gaping Gill, it dives for more than 100 meters into an underground natural hollow. Fell Beck ascends on the impermeable Yoredale rocks of Ingleborough Hill. It streams downhill until it meets Carboniferous Limestone. Now it vanishes underground by means of the swallow opening of Gaping Gill. When underground, it advances through the porous limestone until it returns adjacent to Ingleborough give in on the impermeable rocks of the valley floor.

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joint sheet material plane joint sheet material plane joint sheet material plane Limestone has breaks which run evenly ( bedding planes ) and splits which run vertically ( joints ). The bedding planes speak to times of interference in the testimony of the stone. The joints framed when crustal developments put the stone under stretch.

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The vast stone is an inconsistent which was saved on top of the limestone asphalt by an icy mass amid the Ice Age. It has ensured the limestone underneath and kept it from weathering. All around, where the limestone has not been ensured, compound weathering has brought down the surface of the asphalt. The stature of the plinth of limestone underneath the whimsical speaks to the measure of weathering which has happened since the last ice Age.

Slide 19

On the May Bank Holiday, the Bradford Pothole Club sets up a winch at the highest point of Gaping Gill. Individuals from the general population can be brought down for nothing out of pocket profound underground into a colossal load the span of York Minster. It is a great affair. P.S. It costs £8 to be winched back to the surface!

Slide 20

These little "holes" are shake openings and they are regularly found in limestone nation. They frame while permeating water expands joints underneath the surface. Surface stores (regularly stone mud) fall into the amplified joints making miseries which may run in size from 2m to 15 m over.