landforms and landscapes of deposition - beaches Flashcards
1
Q
how much does a beach stretch across?
A
the low tide to to the high tide line
2
Q
why does beach accretion occur?
A
constructive waves during summer
3
Q
why does beach excavation occur?
A
due to destructive waves in winter
4
Q
what are the two beach types?
A
swash-aligned and drift-aligned
5
Q
whats meant by swash-aligned beaches?
A
wave crest approach perpendicular to coast so there is limited longshore drift - sediment doesnt travel far along the beach
6
Q
whats meant by drift-aligned beaches?
A
waves approach at angle - so sediment travels along the beach, may form a spit - larger sediment is found at the start of the beach
7
Q
where is large sediment found?
A
toward the top of the beach left from winter storms
