Page 130 - Carbonate Platforms Facies, Sequences, and Evolution

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+ marly limestones, + lumpy limestones and marls, 11 = cherty limestones, 12 = + limestones, 9 = nodular limestones (wavy bedding), 10 = + � �'?- '?- + limestone, 4 = quartzitic limestones, 5 = oolitic + 0 0 t 0 «.. ligerina, � the 'abyssal-oceanic' domain: 20km «.. � + 1986). The foraminifera have a marked affinity with Crussol the been deposited in water of> 600 m depth, owing to �7 are black shales (Terres Noires) of late Callovian­ tfE 8 . � tation EiSJg bottom lev
+
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0
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+
�1 2
+
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+:
+
+
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+­
t-
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-t:
+
+ +
+
2
Rosieres
0
�5
SOL
�13
E&l 1
+ +
Pass
+ +
t-
t-
+
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+
+
+
Eserine!-&
+
+
+
+
+
ROSI ERES
+
+ +
+-
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=
tural
given to
as
platform
(Massari,
and
fossil
(Figs
which
is
limestones, 6 =
7
is
ferruginous), 7 =
1979;
record
&
bathymetry
(Farinacci
in
segment
Abbreviations: TN
depth
given
France
of
10).
stromatolitic
of
l::iy
Rhizammina?,
(Elmi,
the
Dromart
13 = marls.
& Elmi,
channellized sandstones, 2 =
the
the
= Ucel Variegated Formation.
Most
&
faunal associations.
palaeobathymetric
Crussol and Rosieres. SO to SlO =
crusts
1983b,
The
1981).
Orcieres
and
Elmi,
Tethyan
controversy
and reliable than rough absolute values.
Glomospirella,
fault
1985b;
importance
1986).
Epistomina,
nodular
has
reconstructions
(Fig.
about
fine grained limestones, 8 = bioclastic
condensed neritic limestones (commonly
10). On each segment, the beds thicken west­
Conse­
Fig. 8. Comparison between the stratigraphic columns of
ation of the amount of tectonic influence on sedimen­
been made conservative by using the smallest depth­
bed­
siltstones, 3 = coarse quartz-pebbles reworked in marine
Globu­
the opposite direction from the
1A,
Dromart,
Bigerina.
sequences as in Fig. 2. 1
'cryptalgal'
'Ammonitico
Similar features
quently, relative estimations are often more useful
have
been
dolomites, sandstones and
in the
the
early Oxfordian age which were estimated to have
119
deepest deposits
= Terres Noires (black shales), FBU