7.8 Sedimentary Cycles
357
SEA-LEVEL
(SL) CHANGE
HIERARCHY OF STRATIGRAPHIC CYCLES
CONTINENTAL ENCROACHMENT CYCLE (1 st order, > 50 Mal
REGRESSIVE PHASE
BREAK-UP OF
SUPERCONTINENT
~~~~~~~----TIME
1---+/
CONTINENT
TRANSGRESSIVE PH
---/
SH RELINE
..,.- - - - - 100 - > 1000 km/-----'> MIGRATION
TRANSGRESSION-REGRESSION CYCLE
PEAK TRANSGR .
SHORELINE
MIGRATION
--.....t .......
-. ....
CAUSE(S)?
~ ~ MAX. REGR.
<- - - 50-200 km J --- -'>~
SEOUENCE CYCLE (3rd order, 0 .5-3 Mal
GLACIO-EUSTASY
~
•
"
ASYMMETRIC?
IRREGULAR?
-
.
<- - 10- 100 7-------l §FANS
PARASEOUENCE CYCLE
PERITIDAL
CYCLE
--I
~
.
:: ~(:
SUB'TIDAL
CYCLIC
BEDDING
LlMESTONE
MARL
ONL Y CLiMATECONTROLLED?
(4th and higher, 0.01-0.5 Mal
PARASEOU.1
PARASEOU.2
RIMMED
CARBONATE
PLATFORM
TST
SILICICLASTICS