Snowdonia

Question 1

Overview

Answer 1

Glaciated landforms in the area - covered by ice in the last glacial maximum.

Question 2

U-shaped valley

Answer 2

Nant Ffrancon is a glacial trough formed by a glacier - today the River Ogwen flows in it - ‘misfit’ river as it is much too small to have created the valley.

Question 3

Corries and Tarns

Answer 3

Llyn Idwal sits above the Nant Ffrancon valley - they are tarns sitting in previous corries - they were formed by tributary glaciers that once flowed into the main glacier in Nant Ffrancon.

Question 4

Truncated spur

Answer 4

Y Gribin - the Y Gribin arete was cut off by the Nant Ffrancon glacier - there may have once been interlocking spurs in a valley here - but they were bulldozed by the glacier.

Question 5

Moraine

Answer 5

Can be found around Llyn Idwal - where it is deposited by a melting glacier - there is both a terminal and lateral moraine - with the terminal moraine being at the mouth of the tarn.

Question 6

Outwash plain

Answer 6

The glacier that once flowed in the Nant Ffrancon valley has discharged into Conwy bay - the flat expanse of glacial till near Abergowen - the outwash plain - shortly after the last glacial maximum - the plain has been eroded to from cliffs - where a clear layer of glacial deposits can be seen.

Question 7

Kame and Esker

Answer 7

Pentir - the esker is around 400m long and up to 10m high - formed around the meltwater of Nant Ffrancon - both features have been eroded by natural and human processes.

Question 8

Blockfields

Answer 8

There are blockfields - created by freeze thaw weathering at the top of many mountains in Snowdonia - at the summit if Glyder Fach.