Page 106 - Carbonate Sedimentology and Sequence Stratigraphy

CHAPTER 6: FUNDAMENTALS OF SEQUENCE STRATIGRAPHY 97

BOUNDARIES ORDER & NAME

1. continental
encroachment

turning point
regression trangression

2. transgressive-
regressive

sea level Highstand systems tract
Transgressive systems tract

exposure surface 3. sequence
Lowstand systems tract

th
th
4 - 6 order sea level
flooding surface parasequence

Fig. 6.13.— Orders of sequences and sequence anatomy after Duval et al. (1998), modified. Orders are defined by duration but also
characterized by their depositional anatomy and the kind of sequence boundary. See text for discussion.
2nd ORDER SEA LEVEL CYCLES
Fig. 6.14.— Duration of sea-level cycles of third and second
25 2nd ORDER order of the eustatic curve of Haq et al. (1987). The two or-
ders broadly overlap even though their modes are different. After
20
Frequency (%) 15 Schlager (2004).

10
5
0
0 5 10 15
30 3rd ORDER SEA LEVEL CYCLES
25 3rd ORDER
20
Frequency (%) 15

10

5
0
0 Duration in My 10 15