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Saltburn - Flambrough head - Coggle Diagram
Saltburn - Flambrough head
location/ about
S - F = 60KM
NE Yorkshire
facts
wind- FETCH =1500KM
waves -4M+ direction = N+NW
geology - varied
sediment cell 1 subcell 1d
energy
FETCH = 1500KM
wave height 4m+
WAVE ENERGY = HIGHEST AT SALTBURN as its most EXPOSED + NORTH FACING
erosion rates vary due to different geologies and the different energy inputs from waves
shale + clay erosion rate = 0.8
sandstone + limestone erosion rate = less than 0.1
LSD operates N - S forming beaches and bays before its interrupted by headlands
geology
North York Moors
rise 400m above sea level made up of limestone, shale and sandstone formed in the jurassic period as well as carboniferous rock
at flambrough head - AT SOUTHERN END headland made up of CHALK + till deposits during the Devensian glacial period at the top of the headland responsible for coastal scenery
sediment
sediment cell 1 subcell 1d from ST ABBS HEAD TO FLAMBROUGH HEAD
SOME SEDIMENT HAS COME FROM SEDIMENT CELL 1D(offshore sources)sediment pushed onto beach during sea level rise in the last glacial period + cliff erosion (sandstone from boulder clay which yields lots of gravel)
River ESK eneters the N sea AT WHITBY - limited sediment input as weirs + reinforced banks at coast
2008-2011 - sediment net increase AT SALTBURN = 9245m3
ACCRETION ZONES OBSERVED AT FILEY BAY power of storms 2010-2011= eroded back of beach
nearshore sediment movement S-W + active erosion at most bays ROBIN HOODS BAY IN DOMINANT WAVE DIRECTION
sediment enters the sea at FILEY BRIGG
beaches
found in SCARBROUGH + FILEY BAY which are LOW ENERGY ENVIRONMENTS
little sediment accumulation due to little sediment inputs from rivers + slow erosion of resistant rocks
HIGH ENERGY WAVES REMOVE SEDIMENT BEFORE IT CAN ACCUMULATE
No spits despite LSD due to high tidal range of 4M + lack of estuarine environments which provide sediment sinks
headlands + bays
ROBIN HOODS BAY = eroded into weak shales with sandstone either side
S = RAVENSCAR
N= NESS POINT
further south FILEY BAY = weak kimmerage clay with more resistant chalk + limestone
FLAMBROUGH HEAD = chalk alt clay
SELSWICK BAY = CAVES, ARCH, STACK, STUMP
STACK = GREEN STACKS PINNCILE
50 + GEOS aligned NE or NNE facing DOMINANT WIND DIRECTION
BLOW HOLES - joints enlarged = collapse = boulder clay
shore line platforms
planform eroded into weaker shales 1 degree - 15 degree
max width 500km - extended into offshore zone
possible it was formed 6000 yrs ago AT STABLE SEA LEVEL
cliffs
along the stretch of coastline
horizontally bedded strata due to the vertical cliff face - till deposits = lower angle
at flambrough
cliffs = chalk (tightly bonded mineral particles) overlain by till -LOWERED BY MM 40 degrees lower angle
CLIFFS ARE 20-30KM
between salt burn + robin hoods bay
varied geology - higher stepped profile highlighting varied geology
STEEP = limestone + sandstone corresponding clays + shales
lowered by MM