Page 163 - Carbonate Platforms Facies, Sequences, and Evolution

UMBRIA- MARCHES APENNINES
SIGNIFICANT STRATIGRAPHY OF STRATIGRAPHY
EVENTS SEAMOUNTS OF BASINS
t seamount­ 0 1-1 -1-
0 )
K BERRIASIAN co basin 0 MAJO- while pelagic limestones ,�L-1.= MAJO- wh�e pela! ic limesto
with nodular and bedde cherts and
with nodular and bedded chert; ellen
Q DRI morphology N 1'- -- dolomilized at the base �- ._... ._. slumps and sediment g
)
levelled
0 )
(/) TITHONIAN 0 "' / • � - -
(/) I / I -
140Ma <: a: t>- rmatypic corals I E - .
reported on
::> KIMMERIDGIAN seamount tops I I 0 - D1.A...: well-bedded green and red
- BUGA- predominantly light N ��---.--:: cherts, cherty limestont ;, occasional
w I brown mudstones and --- calcareous turbidites, a nd marly
� OXFORDIAN I I wackestones, often with nodular 0 <0 · - - interbeds.
_J I texture, containing skeletal - -
fragments ol echinoderms, benthic
Q CALLOVIAN C!l I I forams, pelecypods, and - - -
(/) z I ammonites, with occasional
160 Ma (/) <: � I I packstones and grainstone& �SIOQ!liA MABLS- ·ed, green, and
a: BATHONIAN 0 I containing peloids, intraclasts, and light gray marly limesto nes with
::> a: 0 I ooids as well as skeletal abundant fragments of pelagic
- I- z E I fragments; occasional corals. 0 ) pelecypods, and marty nterbeds
w BAJOCIAN w 0 I I r ....
_J 0:: "' 0 ) --
0 0 0 I I N • .-red, nodular
0 AALENIAN - z I ROSSO
limestones with abund< nt ammonites,
::! I I � separated by marty int< beds.
/
oids produced on
180Ma eamount tops I E C:<'NTIN- muddy c careous
TOARCIAN hallow water I I 0 IT� E turbidites and marly .terbeds.
M
0 detritus in I OE : 0 0 T1 g r.ORIOI A -it. browr well-bedded
..b..L
-
(/) basinal I I w.� IJ�udstones with nodul rchert, f.g.
(/) PLIENSBACHIAN l�l sediments I 0 � 0 , -J ::.: :-. X-·: urbidites, debris lloWl e.
....
<: . . . . with shallow water ca1 bonate particles
a: ,TION OF I I 0 . "' • . .. ("Marmone" beds) .
::> OUNDED I CALC MASSJCCJO- white,
- SINEMURIAN ONATE ) thickly bedded wackeslones to j__) QALQABE MASSIQQIQ · white
200 Ma >- _J MOUNTS 0 E ( grainstones with peloids, ooids, E 0 mudstones to packstone� in
deli ned, massive beds w h peloids,
a: 0 (X) I onkoids, pisoids, and skeletal grains, 0 (X) ooids, onkoids, and skele
<: HETTANGIAN 0 j_ especially calcareous algae. ·�
especially calcareous alg ae.
w 0 0 0 __L__
<0 <0
) '
thickness thickness
Fig. 3. Composite Jurassic stratigraphy showing lithology and thicknesses on seamounts and basins,
significant events in the formation and drowning of the seamounts. Ages and eustatic changes from H
from Centamore et al. (1971).