Page 62 - Carbonate Sedimentology and Sequence Stratigraphy

CHAPTER 3: GEOMETRY OF CARBONATE ACCUMULATIONS 53

Barbados
present sea level Mayotte
present sea level
Holocene barrier reef
drowned
50 reef

100 1500 y
drowned
reef
100 meters
0 500 m 1000
200 meters
Florida
present sea level
4000
past sea levels in years B.P.
5000 0 100 m 200 300
10 6000
7000
7575
8000
* 8295
*
20 7295
* 9000
7595
* 8900
*
8405
*
9440 *
30 meters 10000
1000 m 2000
St Croix, US Virgin Islands
present sea level
970 y

1070 y
10 3180 y 7240 y
4360 y

20 base of ship channel

30 meters 1000 m 2000 3000 4000

Fig. 3.24.— Reefs that were outpaced and drowned by the Holocene transgression show the raised-rim morphology in pristine form,
illustrating the strong inclination of reefs to grow upward rather than gradually shift sideways upslope. Compiled from Macintyre et al.
(1991), Barbados; Lighty et al. (1978), Florida; Adey et al. (1977), St. Croix; Dullo et al. (1998), Mayotte.

balance between the effects of differential upbuilding and in space and time.
selective dissolution. This balance almost certainly varied