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BURBAGE VALLEY. BURBAGE VALLEY. The valley is drained by Burbage brook, a tributary of the River Derwent. The valley has been carved through two different types of rock - 'millstone grit' and 'shale'. Within this small area we can explore the range of factors which affect the work of rivers.

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Burbage valley1
BURBAGE VALLEY

  • The valley is drained by Burbage brook, a tributary of the River Derwent. The valley has been carved through two different types of rock - 'millstone grit' and 'shale'. Within this small area we can explore the range of factors which affect the work of rivers.


Burbage valley2
BURBAGE VALLEY

  • Burbage brook rises on a moorland plateau. Beneath the surface are impermeable gritstone rocks, so this moorland is very wet. The poor drainage means that vegetation does not rot easily, and a layer of peat has formed over the surface


Burbage valley3
BURBAGE VALLEY

  • In the upper valley the concave slopes are formed with millstone grit at the top and shale beneath. Around the edge of the valley is a crag of millstone grit known locally as an 'edge'. Millstone grit is a resistant rock which has distinctive bedding and jointing planes. Frost shattering in the ice age expanded these cracks and divided the rock into blocks



Burbage valley5
BURBAGE VALLEY

  • In the upper part of the valley the river flows over resistant beds of gritstone, The bed of the stream is steep, making it fast-flowing. The energy of the fast flowing water allows it to transport large boulders in times of flood as bedload. At this point the valley sides are steep and the floor of the valley is narrow.


Burbage valley6
BURBAGE VALLEY

  • In the middle section of the valley the river meanders. At the outside of the bends the river undercuts the hillside and landslides occur bringing rock and soil debris into the river. At the inside of the bend is a flatter area, built up over time by deposition


Burbage valley7
BURBAGE VALLEY

  • The valley is drained by Burbage brook, a tributary of the R. Derwent. The valley has been carved through two different types of rock - 'millstone grit' and 'shale'. Within this small area we can explore the range of factors which affect the work of rivers.


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