Why are some parts of Scotland steep and some parts of Scotland flat? Scotland Rocks! Presentation...
-
Upload
christal-tate -
Category
Documents
-
view
216 -
download
0
Transcript of Why are some parts of Scotland steep and some parts of Scotland flat? Scotland Rocks! Presentation...
Why are some parts of Scotland steep andsome parts of Scotland flat?
Scotland Rocks!
Presentation © Hodder Gibson 2012
Presentation © Hodder Gibson 2012
The reason the Scottish Landscape is so varied is because it is made up of lots of different types of rocks all of which have different forces acting upon them shaping the landscape.
There are three main types of rock:
Metamorphic rocks
Presentation © Hodder Gibson 2012
Sedimentary rocks
Igneous rocks
Presentation © Hodder Gibson 2012
Sedimentary rocks
Sedimentary rocks are formed from the compressed remains of other rocks. They tend to form under water and often contain fossils.
Presentation © Hodder Gibson 2012
Igneous rocks
Igneous rocks are formed from within the earth’s crust from the cooling of molten material they are sometimes extruded
onto the earth surface (for example at volcanoes).
Presentation © Hodder Gibson 2012
Metamorphic rocks
Metamorphic rocks have been changed and hardened by extreme heat from molten rocks within the crust or have been made by great pressure caused by earth movements.
Presentation © Hodder Gibson 2012
The Geologyof Scotland
Characteristics of rocks
Presentation © Hodder Gibson 2012
Some rocks are relatively soft (eg: salt)…
…while others are relatively hard.
Presentation © Hodder Gibson 2012
Characteristics of rocks
Some rocks are permeable – they allow water to drain through them easily. Others are impermeable and keep all water on the surface.
All rocks, even the hardest ones, have
weaknesses.
Presentation © Hodder Gibson 2012
Presentation © Hodder Gibson 2012
All over the Earth, rivers, waves, glaciers and the wind are hard at work, shaping the landscape. We call them geological agents.
they carry or transport it somewhere else...
then they drop or deposit it.
They pick up or erode weathered material...
What shapes the land?
Presentation © Hodder Gibson 2012
Ocean waves, created by the wind, crash into the coastline and over time erode to form caves, stacks, stumps and arches.
Chesil Beach, Dorset
Waves drag sediment along coast and deposit
material in sheltered coves forming beaches.
Sennen Cove, Cornwall
Kirkaig Falls
Volga Delta
Kirkaig FallsRivers flow over rocks of different resistance, eroding them at different speeds to create impressive waterfalls.
When rivers reach the sea they lose energy and deposit sediment
that can form large deltas.Presentation © Hodder Gibson 2012
The wind picks up small particles of rock and blows it into bigger rocks slowly eroding and scratching them away over time.
In some hot deserts, when the wind drops in speed and loses energy, it deposits sand forming sand dunes.
Presentation © Hodder Gibson 2012
When the ice melts some of these rocks are
deposited and left behind. (Erratic)
Mer de Glace, France
Glaciers erode by plucking and abrading rocks from the valley sides.
Presentation © Hodder Gibson 2012
Austwick, North Yorkshire
Your Turn!
Read pages: 16 and 17
Answer Questions: 1–3
Presentation © Hodder Gibson 2012