Criccieth Bay - physical features Flashcards
1
Q
what are beach cusps ?
A
beach formations made of different sized sediment in an arc pattern
2
Q
what are the horns of the beach cusps made up of?
A
coarser materials and centre has finer material
3
Q
where do beach cusps ussually occur?
A
in a regular pattern with cusps of equal size and spacing
4
Q
how far can beach cusps reach across?
A
60 metreres (with cusps a few metres wide)
5
Q
what is though of the creation of beach cusps?
A
unproven area of debate
6
Q
once beach cusps develop they are what?
A
self sustaining
7
Q
what is the Black Rock (Graig Ddu)
A
a headland composed of tough folded rock
8
Q
what are the folds and faults of Graig Ddu due to?
A
earth movement
9
Q
what has the earth movements resulted in for Black Rock?
A
many lines of weakness which waves can exploit
