Geoscience Reference
In-Depth Information
(a)
(i) Wentlooge (
c
. 2000 yr BP)
(ii) Late Wentlooge (late 17th Century)
Seabank
Reclaimed land
Sea level
Accretion
Sea level
Accretion
(iii) Early Rumney (early 18th Century)
(iv) Mid Rumney (early 19th Century)
Accretion
s.l.
Reworked
material
s.
l.
Retreat
(v) Early Awre (late 19th Century)
(vi) Late Awre (early 20th Century)
s.l.
Accretion
s.
l.
Retreat
(vii) Early Northwick (1930)
(viii) Late Northwick (1960)
s.
l.
Retreat
s.l.
Accretion
(ix) Present day
Seabank
Reclaimed land
Rumney
Formation
Reworked
material
Modern
mudflat
Seabank
Bedrock
c
. 5 m
MHWST
River Terrace
Awre Formation
Retreat
Wentlooge
Formation
Northwick
Formation
(b)
Case Fig. 7.1
(a) The sequential evolution of
salt marsh morphology in the Severn estuary
(French 1999). (b) Post-early nineteenth century
brown Rumney Formation sediments overlying
the older green Wentlooge sediments
(Rumney Great Wharf, South Wales).
