Page 108 - Carbonate Platforms Facies, Sequences, and Evolution

El
98
the
major
.
�
�
Lower
broadly
Brull
laminated
Lower
Depositional
Muschelkalk)
Unit
sea-level
Muschelkalk
transgressive
rise
Depositional sequence
is
sequence
(peritidal
1
and Lower Muschelkalk)
Max imum flooding surface
a
2
Muschelkalk.
cycle
lutite-carbonate-evaporite
of
unit
(Figs 5
The
limestone-dolomite
(Figs
depositing
F.
LOWSTAND SYSTEMS TRACT
maximum flooding surface (Mfs-1).
&
thus the transgressive systems tract,
DEPOSITIONAL SYSTEMS TRACTS
-
highstand
most Buntsandstein which represents
DEPOSITIONAL SYSTEMS TRA CTS
(LADINIAN. MIDDLE
and
IN
13
HIGHSTAND SYSTEMS TRACT -2
TR ANSG RESS IVE SYSTEMS TRACT -
2
deposits), the
-
the
19)
2
2
Unit
&
the
(HST-1). The major transgressive surface
deposition
Depositional sequence 2 (Middle and Upper
the lutite-carbonate-evaporite unit of the
Colldejou
El
systems
Olesa
20)
TRIA SSIC)
and
TST-1
consists
Calvet, M.E.
Depositional sequence 1 (Uppermost Buntsandstein
upper­
in-
Muschelkalk). The regional paraconformity located
at the top of the transgressive cycle, represents the
(Lower
sequence reflects a minor transgression, before the
located at the boundary between the Buntsandstein
Brull
Unit
systems tract, here named LST-1 succeeded by the
first marine incursion into the Catalan Basin. This
The lutite-carbonate-evaporite unit represents the
tract
termed TST-1.
(Ts-1) is
(intertidal-sabkha deposits) of the upper part of the
(lagoonal deposits) and the Vilella Baixa Unit (from
the lowstand
are
lagoonal to shoal deposits) which are the result of a
of
Unit
of
the
the
i.e.
and
facies
result
THE . UPPER MUSCHELKALK
facies)
Rojals
Rojals
eludes
located
the
domains
NE
lowstand
of
deposits)
I LITHOSTRATIGRAPHIC UN ITS
sequence
of
Tucker and J.M.
Montseny
in
limestones
the
at
a
Querol
2.
HST-2.
Unit
Unit,
tract, TST-2.
the
thus
and
Alcover Unit
Capafons
the
unit
the
the
The
Unit
and
the
systems
Henton
The
Capafons
Middle
Unit
Domain.
general
Baix
belong
Middle
in
tract
to
Unit
(anoxic to
(Upper
Fig. 20.
Rojals
These
boundary
Benifallet
the
Rasquera
the
(Ladinian).
Benifallet
(LST
Unit
transgressive
Muschelkalk
-2)
units
transgressive
Unit
Unit
Muschelkalk
Ebre- Priorat
Prades
of
between
of
and
in
Muschelkalk).
surface
(deep
cycle,
the
Unit and the
(stromatolites-oolites)
in the Upper Muschelkalk
the
transgressive
the
the
as
Depositional systems
La
(high-energy
The
Domain,
Domain;
shallow-water facies)
represent
and
ramp
is
(lagoonal-marsh-mud
(Ts-2)
tracts and lithostratigraphical units
Gaia­
de­
con­
reefs Unit in the Prades Domain, likewise, are the
deposits), the Benifallet Unit (from lagoonal to shoal
the
and
tidal
Riba
a broadly transgressive cycle of sedimentation. The
posits) in the Baix Ebre-Priorat Domain constitute
flat
The Tivissa Unit (deep to shallow ramp deposits)
Muschelkalk. The continental clastic and evaporitic
the
the
Upper
the
different
and
depositional
in the Baix Ebre-Priorat Domain and the erosive
densed faunal level at the top of the Rasquera Unit
highstand systems tract of Depositional sequence 2,
have the same regressive character and constitute a
Capafons Unit in the Gaia- Montseny Domain, all
is
systems
Muschelkalk fine clastic facies and the Rojals oolitic
Middle