Citation:

96PA00572

Name: Pliocene benthic foraminiferal abundances of ODP Hole 105-646B from north Atlantic
Published: 1996
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Our benthic foraminiferal data clearly indicate eight layers of deep-water turbidites during the Messinian (MTL 1-8) and one in the early Pliocene (PTL 1) in Ocean Drilling Program Leg 105, Site 646B. These deep-water tuibidite deposits are characterized by highly concentrated agglutinated marsh benthic foraminifera (e.g., Trochammina cf. squamata, Ammotium sp. A, Miliammina fusca), rounded quartz, polished thick-walled benthic foraminifera, wood fragments, plant seeds, plant fruit, and highly concentrated mica and are interbedded with sediments containing deep-water benthic faunas. We suggest these turbidites deposited during sea-level low stands (approx. 80-100 m below sea level), and their ages are tentatively correlated to 6.59, 6.22, 6.01, 5.89, 5.75, 5.7, 5.65, 5.60, and 5.55 Ma, respectively, based on the Messinian oxygen isotope enrichments at Site 552A of Deep Sea Drilling Project Leg 81. The turbidites layers during the late Messinian, coeval with frequent climate changes suggested by six oxygen enrichment excursions of Site 552A, may have been in part linked to the late Messinian evaporite deposits in the Mediterranean Basin. The most profound climate changes at 5.75 and 5.55 Ma may have been related to the Lower and Upper Evaporites in the Mediterranean Basin.

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Latitude: 58.209300 * Longitude: -48.369100

Date/Time Start: 1985-10-04T08:45:00 * Date/Time End: 1985-10-13T21:01:00

Minimum DEPTH, sediment/rock: 384.10 m * Maximum DEPTH, sediment/rock: 758.80 m

Event(s):

105-646B * Latitude: 58.209300 * Longitude: -48.369100 * Date/Time Start: 1985-10-04T08:45:00 * Date/Time End: 1985-10-13T21:01:00 * Elevation: -3459.0 m * Penetration: 766.7 m * Recovery: 404.25 m * Location: Labrador Sea * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 80 cores; 766.2 m cored; 0 m drilled; 52.8 % recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Sample code/label	Sample label		Zhang, Jijun	DSDP/ODP/IODP sample designation
2	DEPTH, sediment/rock	Depth sed	m			Geocode
3	Foraminifera, benthic	Foram benth	#	Zhang, Jijun		counted/picked
4	Foraminifera, benthic	Foram benth	#/cm³	Zhang, Jijun
5	Foraminifera, benthic calcareous	Foram benth calc	%	Zhang, Jijun	Counting
6	Foraminifera, benthic	Foram benth	%	Zhang, Jijun	Counting	of total fauna (benthic + planktonic)
7	Fragmentation index, planktic foraminifera	Fragm plankt foram	%	Zhang, Jijun	Counting
8	Lenticulina spp.	Lenticulina spp.	%	Zhang, Jijun	Counting
9	Nonion spp.	Nonion spp.	%	Zhang, Jijun	Counting
10	Nonionella spp.	Nonionella spp.	%	Zhang, Jijun	Counting
11	Astrononion echolsi	A. echolsi	%	Zhang, Jijun	Counting
12	Astrononion umbilicatulum	A. umbilicatulum	%	Zhang, Jijun	Counting
13	Elphidium sp.	Elphidium sp.	%	Zhang, Jijun	Counting	genus questionable
14	Pullenia bulloides	P. bulloides	%	Zhang, Jijun	Counting
15	Pullenia quinqueloba	P. quinqueloba	%	Zhang, Jijun	Counting
16	Melonis barleeanus	M. barleeanus	%	Zhang, Jijun	Counting	including Melonis affinis
17	Melonis pompilioides	M. pompilioides	%	Zhang, Jijun	Counting
18	Florilus sp.	Florilus sp.	%	Zhang, Jijun	Counting
19	Sphaeroidina bulloides	S. bulloides	%	Zhang, Jijun	Counting
20	Oridorsalis umbonatus	O. umbonatus	%	Zhang, Jijun	Counting
21	Planulina rugosa	P. rugosa	%	Zhang, Jijun	Counting
22	Planulina wuellerstorfi	P. wuellerstorfi	%	Zhang, Jijun	Counting
23	Cibicides lobatulus	C. lobatulus	%	Zhang, Jijun	Counting
24	Cibicidoides bradyi	C. bradyi	%	Zhang, Jijun	Counting
25	Cibicidoides spp.	Cibicidoides spp.	%	Zhang, Jijun	Counting
26	Rosalina sp.	Rosalina sp.	%	Zhang, Jijun	Counting	genus questionable
27	Gyroidina soldanii	G. soldanii	%	Zhang, Jijun	Counting
28	Gavelinopsis praegeri	G. praegeri	%	Zhang, Jijun	Counting
29	Laticarinina pauperata	L. pauperata	%	Zhang, Jijun	Counting
30	Valvulineria laevigata	V. laevigata	%	Zhang, Jijun	Counting
31	Nuttallides umbonifera	N. umbonifera	%	Zhang, Jijun	Counting
32	Hoeglundina elegans	H. elegans	%	Zhang, Jijun	Counting
33	Epistominella exigua	E. exigua	%	Zhang, Jijun	Counting
34	Eponides polius	E. polius	%	Zhang, Jijun	Counting
35	Eponides tumidulus	E. tumidulus	%	Zhang, Jijun	Counting
36	Eponides weddellensis	E. weddellensis	%	Zhang, Jijun	Counting
37	Eponides sp.	Eponides sp.	%	Zhang, Jijun	Counting	genus questionable, sp. A
38	Discorbinella bertheloti	D. bertheloti	%	Zhang, Jijun	Counting
39	Globocassidulina subglobosa	G. subglobosa	%	Zhang, Jijun	Counting
40	Cassidulina laevigata	C. laevigata	%	Zhang, Jijun	Counting
41	Cassidulina reniforme	C. reniforme	%	Zhang, Jijun	Counting
42	Cassidulina sp.	Cassidulina sp.	%	Zhang, Jijun	Counting
43	Cassidulinoides tenuis	C. tenuis	%	Zhang, Jijun	Counting
44	Foraminifera, benthic indeterminata	Foram benth indet	%	Zhang, Jijun	Counting	unidentified rotaliids
45	Uvigerina peregrina	U. peregrina	%	Zhang, Jijun	Counting
46	Uvigerina proboscidea	U. proboscidea	%	Zhang, Jijun	Counting
47	Uvigerina sp.	Uvigerina sp.	%	Zhang, Jijun	Counting
48	Rectuvigerina spp.	Rectuvigerina spp.	%	Zhang, Jijun	Counting
49	Trifarina angulosa	T. angulosa	%	Zhang, Jijun	Counting
50	Ehrenbergina trigona	E. trigona	%	Zhang, Jijun	Counting
51	Bulimina alazanensis	B. alazanensis	%	Zhang, Jijun	Counting
52	Bulimina tessellata	B. tessellata	%	Zhang, Jijun	Counting
53	Bulimina sp.	Bulimina sp.	%	Zhang, Jijun	Counting
54	Globobulimina auriculata	G. auriculata	%	Zhang, Jijun	Counting
55	Robertinoides charlottensis	R. charlottensis	%	Zhang, Jijun	Counting
56	Bolivina pygmaea	B. pygmaea	%	Zhang, Jijun	Counting
57	Bolivina pygmaea	B. pygmaea	%	Zhang, Jijun	Counting	cf. species
58	Bolivina pseudoplicata	B. pseudoplicata	%	Zhang, Jijun	Counting
59	Bolivina pseudothalmanni	B. pseudothalmanni	%	Zhang, Jijun	Counting
60	Bolivina simplex	B. simplex	%	Zhang, Jijun	Counting
61	Bolivina pseudopunctata	B. pseudopunctata	%	Zhang, Jijun	Counting
62	Bolivina lowmani	B. lowmani	%	Zhang, Jijun	Counting
63	Bolivina inflata	B. inflata	%	Zhang, Jijun	Counting
64	Bolivina cf. alata	B. cf. alata	%	Zhang, Jijun	Counting	cf. species
65	Bolivina spp.	Bolivina spp.	%	Zhang, Jijun	Counting
66	Nodosaria sp.	Nodosaria sp.	%	Zhang, Jijun	Counting
67	Fursenkoina fusiformis	F. fusiformis	%	Zhang, Jijun	Counting
68	Pleurostomella spp.	Pleurostomella spp.	%	Zhang, Jijun	Counting
69	Stilostomella spp.	Stilostomella spp.	%	Zhang, Jijun	Counting
70	Dentalina communis	D. communis	%	Zhang, Jijun	Counting
71	Guttulina sp.	Guttulina sp.	%	Zhang, Jijun	Counting
72	Oolina spp.	Oolina spp.	%	Zhang, Jijun	Counting
73	Lagena spp.	Lagena spp.	%	Zhang, Jijun	Counting
74	Fissurina spp.	Fissurina spp.	%	Zhang, Jijun	Counting
75	Quinqueloculina seminulum	Q. seminulum	%	Zhang, Jijun	Counting
76	Quinqueloculina sp.	Quinqueloculina sp.	%	Zhang, Jijun	Counting
77	Pyrgo spp.	Pyrgo spp.	%	Zhang, Jijun	Counting
78	Sigmoilina tenuis	S. tenuis	%	Zhang, Jijun	Counting
79	Tosaia hanzawai	T. hanzawai	%	Zhang, Jijun	Counting
80	Cornuspirella diffusa	C. diffusa	%	Zhang, Jijun	Counting
81	Foraminifera, benthic indeterminata	Foram benth indet	%	Zhang, Jijun	Counting	unidentified serial forms
82	Karreriella bradyi	K. bradyi	%	Zhang, Jijun	Counting
83	Martinottiella communis	M. communis	%	Zhang, Jijun	Counting
84	Siphotextularia sp.	Siphotextularia sp.	%	Zhang, Jijun	Counting
85	Trochammina squamata	T. squamata	%	Zhang, Jijun	Counting	cf. species
86	Trochammina sp.	Trochammina sp.	%	Zhang, Jijun	Counting	sp. W
87	Cyclammina cancellata	C. cancellata	%	Zhang, Jijun	Counting
88	Ammotium sp.	Ammotium sp.	%	Zhang, Jijun	Counting	sp. A
89	Recurvoides sp.	Recurvoides sp.	%	Zhang, Jijun	Counting
90	Haplophragmoides sp.	Haplophragmoides sp.	%	Zhang, Jijun	Counting
91	Miliammina fusca	M. fusca	%	Zhang, Jijun	Counting
92	Ammobaculites sp.	Ammobaculites sp.	%	Zhang, Jijun	Counting
93	Sigmoilopsis schlumbergeri	S. schlumbergeri	%	Zhang, Jijun	Counting
94	Sigmoilopsis sp.	Sigmoilopsis sp.	%	Zhang, Jijun	Counting
95	Spiroplectammina sp.	Spiroplectammina sp.	%	Zhang, Jijun	Counting
96	Lagenammina sp.	Lagenammina sp.	%	Zhang, Jijun	Counting
97	Psammosphaera spp.	Psammosphaera spp.	%	Zhang, Jijun	Counting
98	Saccammina sp.	Saccammina sp.	%	Zhang, Jijun	Counting
99	Rhizammina spp.	Rhizammina spp.	%	Zhang, Jijun	Counting
100	Dendrophrya sp.	Dendrophrya sp.	%	Zhang, Jijun	Counting
101	Bigenerina sp.	Bigenerina sp.	%	Zhang, Jijun	Counting	genus questionable
102	Glomospira sp.	Glomospira sp.	%	Zhang, Jijun	Counting
103	Reophax sp.	Reophax sp.	%	Zhang, Jijun	Counting
104	Textularia sp.	Textularia sp.	%	Zhang, Jijun	Counting
105	Ammodiscus sp.	Ammodiscus sp.	%	Zhang, Jijun	Counting
106	Vulvulina spinosa	V. spinosa	%	Zhang, Jijun	Counting
107	Foraminifera, benthic agglutinated indeterminata	Foram benth agg ind	%	Zhang, Jijun	Counting

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

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9434 data points

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