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Inferred other characteristics
Lateral ridge spacing: 2.9-6.5 km
Water palaeodepth: 12-26m
10-15m
2D dunes
(B)
~200 m
(C)
2 m
(D)
(E)
2
Data from Caston (1972)
Modern
tidal sand ridges
S
Data from Dyer & Huntley (1999)
10
-4
H
200
Data from Goff
et al
. (2005)
8
Data from Swift & Field (1981)
6
Data from Evans (1970)
Data from Kenyon
et al
. (1981)
4
Data from Cameron
et al
. (1992)
2
100
10
-3
8
6
35
15
4
Data from Off (1963)
0
2
1.1
3
2
4
6
8
2
4
6
8
2
4
6
8
0
5
10
15
10
-1
10
0
Ridge height (max. relief),
H
(m)
10
1
10
2
Width,
W
(km)
Fig. 9.
(A) The inferred shape, dimensions, lateral spacing and palaeobathymetry of the tidal sand ridges in the Garn Fm.,
Kristin Field. (B) Aerial photograph of a modern tidal sand ridge, Banc d'Arquin in the English Channel, covered with only a
few metres of water in the crestal zone at ebb tide; the white spots on the dark sea surface are the wake bores of bypassing
motorboats. (C) Longitudinal outcrop section of an Eocene tidal sandstone ridge, Rab island, Croatia; the dominant palaeocur-
rent direction is to the left. (D) Statistical linear relationship between the width and length of modern tidal sand ridges; n -
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