Page 224 - Carbonate Platforms Facies, Sequences, and Evolution

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platform or its edges.
13
substantial
Hauterivian-early
drop
CHAMBOTTE
on the other, suggest
in
On the contrary,
Barremian
sea-level
in
strata,
the one hand, and the unexpected geometrical dis­
Sonic
Basin (as interpreted by Clavel et al., 1987), nor any
steady sedimentation during this period on the Jura
early Barremian and by the emergence of the Jura
a complex history
the
on
the absence
initial sequence of the late Barremian Urgonian limestone.
LA
TAILLA
1
Matheronites limentinus level. The Aptian foraminifera are not represented.
On the Jura
Resist.
The Jura and northern Subal pine chains
SEA-LEVEL
platform,
HAUTERIVIAN
AND
Hauterivian depositional sequence
the basal
BARREMIAN
VARIATIONS
+
IN
EARLY
depositional sequence (bioclastic and oolitic limestone of the Pierre Jaune de Neuchatel Formation); the probable
DEPTH
Hauterivian
formation, the Glandasse bioclastic limestone formation and the Urgonian limestone formation, respectively. MLL,
\
I
I
THE
-
\
\
Upper Hauterivian transgressive systems tract; the type l unconformity at the base of the Urgonian limestone; and the
The microfaunas A, B, C and D characterize the Pierre Jaune de Neuchatel Formation, the Borne bioclastic limestone
\
Fig. 6. Comparison between La Chambotte section and La Tailla l borehole showing: the top of the Lower Hauterivian
cor­
I
I
I
I
I
I
209
northern Subalpine chains. Aptian zonation according to Casey (1961). Barremian zonation according to Busnardo (1984).
Fig. 5. [Opposite] Main stratigraphic units and distribution of the more important benthic foraminifera in the Jura and the
which the platform was drowned and covered with
responds to the ultimate transgression stage during