Page 94 - Carbonate Sedimentology and Sequence Stratigraphy

CHAPTER 6: FUNDAMENTALS OF SEQUENCE STRATIGRAPHY 85

A) Cross section

alluvial shoreface/deltaic sands

coastal plain estuarine-fluvial marine shale

slope fan
mfs
TST HST SMST SB2
SB1 (condensed)
floor fan

incised valley HST
sf
ts bf

B) Time-distance section correlative conformity
(sequence boundary)
alluvial to estuarine shoreface marine

SMST
SB 2

HST
mfs condensed section
TST

(ivf)
ts LSW
subaerial hiatus
sf
bf
SB1
HST

distance
correlative conformity
(sequence boundary)

Fig. 6.3.— Stratigraphic sequences and their systems tracts . Abbreviations in alphabetic order: bf = basin-floor fan; HST = highstand
systems tract; LSW = lowstand wedge; mfs = maximum flooding surface; SB1 = type-1 sequence boundary; SB2 = type-2 sequence
boundary; sf = slope fan; SMST = shelf-margin systems tract; ts = transgressive surface; TST = transgressive systems tract. A)
Schematic cross section of the standard model B) Section with distance on horizontal axis (same scale in A) and time on vertical axis
(“Wheeler diagram”). After Vail (1987), modified.