Page 164 - 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 limestones
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 .vity flows
)
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.g. turbidites
....
<: . . . . 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 poorl
deli ned, massive beds w h peloids,
a: 0 (X) I onkoids, pisoids, and skeletal grains, 0 (X) ooids, onkoids, and skele al lragments,
<: 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, est
significant events in the formation and drowning of the seamounts. Ages and eustatic changes from Haq et
from Centamore et al. (1971).