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Taf fawr & Taf Fechan

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Taf fawr & Taf Fechan. Do you recognise this view?. It is a from a hill called Y Gyrn above the Storey Arms. The mountain is Fan Fawr . Here we find a watershed. To the south water runs down into the Taff Valley. To the North it runs into the Usk Valley. What do you know

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Presentation Transcript
slide1

Taf fawr & Taf Fechan

Do you recognise this view?

It is a from a hill called Y Gyrn above the Storey Arms. The mountain is Fan Fawr . Here we find a watershed.

To the south water runs down into the Taff Valley. To the North it runs into the Usk Valley.

slide2

What do you know

about the Storey Arms?

Today the Storey Arms is an outdoor activities centre near the A470, the main road from Cardiff to Brecon.

Originally it was an Inn at the highest point on the rough road which linked Merthyr and Brecon. It was used as a resting place for travellers and horses alike.

slide3

Can you name these mountains?

The River Taff starts its 30 mile journey to the sea high in the Brecon Beacons National Park. Its source can be found close to its highest peaks Pen-y-Fan and Corn du.

It starts as 2 rivers the Taf Fawr and the Taf Fechan.

slide4

Sketch map showing the Taf Fawr and Taf Fechan

Can you trace the routes of the Taf Fawr and Taf Fechan on this map?

What else can you see?

slide5

What do you know about Pen-y-Fan?

Pen-y-Fan is the highest peak in Southern Britain. It is 2907ft (886m) high. The flat tops on the mountains are caused by a layer of hard rock. Softer rocks above it have been worn away leaving the hard flat top.

slide6

What can you see here?

If we look south from Y Gyrn we see that the Taf Fawr has been dammed to create reservoirs. Here we can clearly

see the Beacons reservoir and Cantref in the distance. A third reservoir lies further south this is called Llwyn Onn..

The A470 runs alongside these reservoirs.

We can also see an area of forestry with some evergreen Sitka spruce trees.

slide8

Is this a natural lake or a man made reservoir?

High in the mountains we find a natural lake called Llyn Cwm Llwch.

slide10

How does the river start?

Up in the mountains the ground is very wet and spongy.

The water slowly drains from this marshy ground into streams.

slide11

Quite often this ground is peat.

Here we can see this peat as it

is being eroded.

slide12

Many of these streams run down the mountain sides. When they run over layers of hard rock we see waterfalls.

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