GL22 Impact of aspect and geology in Snowdonia Flashcards
What is the impact of aspect on the landscape?
Aspect can influence the landscape by affecting the location, size, and overall scale of landforms, such as cwms.
What is the prevailing wind in this northern hemisphere location?
The prevailing wind in this northern hemisphere location comes from the southwest.
How does the prevailing wind affect the location of cwms in the valley?
The prevailing wind affects the location of cwms in the valley by causing them to be located on the opposite side of the valley from where the wind is blowing.
What is the impact of geology on the landscape?
Geology can influence the location, size, and shape of landforms by affecting the rock strength, which is determined by lithology and structure.
What is lithology in geology?
Lithology is the intrinsic properties of the rock, such as mineralogy, crystalline or cement bonding, particle size, and void ratio.
What is the structure in geology?
The structure is the geometric arrangement of discontinuities (joints, faults, fractures, cleavage) inherited principally from earth movements.
Which way do the rocks fold in the Nant Ffrancon valley?
The rocks fold down southeastwards in the Nant Ffrancon valley.
What rock type makes up the high ground in the Nant Ffrancon valley?
Igneous rocks make up the high ground in the Nant Ffrancon valley.
What rock type makes up the low ground in the Nant Ffrancon valley?
Sedimentary rocks make up the low ground in the Nant Ffrancon valley.
How does lithology affect the formation of cwms in the Nant Ffrancon valley?
Lithology affects the formation of cwms in the Nant Ffrancon valley by creating steeper valley sides because the soft rock gets eroded.
What is the importance of lithology in the formation of U shaped valleys?
Lithology is important in the formation of U shaped valleys because it affects the strength of the rock and, therefore, the depth and shape of the valley.
What are some sources for further reading on glaciation in Snowdonia?
Some sources for further reading on glaciation in Snowdonia are FSC Upland Glaciation Background Information, Snowdonia National Park Authority - Glaciation – Past and Present Effects, and books such as Discovering Landscape in England and Wales and The Landforms of England and Wales.
