Citation:

odp.proc.sr.138.135.1995

Name: (Table 2) Details of laminated intervals of ODP Leg 158 holes
Published: 1995
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Scanning electron microscope (SEM)-based analyses of the laminated diatom oozes encountered during Leg 138 reveal three major laminae types. The first lamina type is composed of multiple layers of ~20-?m-thick diatom mats, which form laminae dominated by assemblages of the pennate diatom, Thalassiothrix longissima. More than one variety/subspecies of T. longissima occurs within these laminae (referred to as the T. longissima Group). The second lamina type is composed of a mixed-assemblage of several species of diatoms (centric and pennate varieties), calcareous nannofossils, and subordinate quantities of radiolarians, silicoflagellates and foraminifers. The third lamina type is dominated by an assemblage of nannofossils and minor amounts of those fossil components mentioned above. This last form of lamination is compositionally similar to the background sediment type, foraminifernannofossil ooze (F-NO). Two lamina associations occur within the laminated intervals; the first comprises alternations of T. longissima Group and mixed-assemblage laminae (average thickness is ~6 mm) and the second is composed of T. longissima and nannofossil-rich laminae (average thickness is ~3.5 mm). The arrangement of laminae probably originates from the deposition of multiple layers of 20-?m-thick mats from one mat-flux episode. The much thinner nannofossil-rich laminae are interpreted to represent periods of more ônormalö deposition between mat-flux episodes. The occurrence of several varieties/subspecies of T. longissima within individual mat layers is consistent with observations of Rhizosolenia diatom mats in the modern world ocean.

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Median Latitude: 2.582811 * Median Longitude: -101.716731 * South-bound Latitude: 0.183050 * West-bound Longitude: -110.571480 * North-bound Latitude: 7.921310 * East-bound Longitude: -90.480760

Date/Time Start: 1991-05-11T10:24:00 * Date/Time End: 1991-08-09T06:00:00

Minimum Elevation: -3839.1 m * Maximum Elevation: -3334.3 m

Event(s):

138-844B * Latitude: 7.921310 * Longitude: -90.480760 * Date/Time Start: 1991-08-09T06:00:00 * Date/Time End: 1991-05-11T10:24:00 * Elevation: -3414.5 m * Penetration: 290.9 m * Recovery: 289.92 m * Location: North Pacific Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 31 core; 290.9 m cored; 0 m drilled; 99.7 % recovery

138-844C * Latitude: 7.921310 * Longitude: -90.480760 * Date/Time Start: 1991-05-11T10:24:00 * Date/Time End: 1991-05-12T08:04:00 * Elevation: -3414.5 m * Penetration: 180.1 m * Recovery: 189.34 m * Location: North Pacific Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 19 cores; 180.1 m cored; 0 m drilled; 105.1 % recovery

138-847B * Latitude: 0.193210 * Longitude: -95.320450 * Date/Time Start: 1991-05-28T06:50:00 * Date/Time End: 1991-05-29T18:40:00 * Elevation: -3334.3 m * Penetration: 247 m * Recovery: 242.19 m * Location: North Pacific Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 27 cores; 247 m cored; 0 m drilled; 98.1 % recovery

Comment:

DEPTH, sediment is given in mbsf.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	Sample code/label	Sample label		Pearce, Richard B	DSDP/ODP/IODP sample designation
3	Thickness	Thick	mm	Pearce, Richard B
4	Number	No		Pearce, Richard B		T. longissima-rich
5	Thickness	Thick	mm	Pearce, Richard B		T. longissima-rich, mean
6	Standard deviation	Std dev	±	Pearce, Richard B		T. longissima-rich, thickness
7	Range, minimum	Min	mm	Pearce, Richard B		T. longissima-rich
8	Range, maximum	Max	mm	Pearce, Richard B		T. longissima-rich
9	Number	No		Pearce, Richard B		Mixed-assemblage
10	Thickness	Thick	mm	Pearce, Richard B		Mixed-assemblage, mean
11	Standard deviation	Std dev	±	Pearce, Richard B		Mixed-assemblage, thickness
12	Range, minimum	Min	mm	Pearce, Richard B		Mixed-assemblage
13	Range, maximum	Max	mm	Pearce, Richard B		Mixed-assemblage
14	Number	No		Pearce, Richard B		Nannofossil-rich
15	Thickness	Thick	mm	Pearce, Richard B		Nannofossil-rich, mean
16	Standard deviation	Std dev	±	Pearce, Richard B		Nannofossil-rich, thickness
17	Range, minimum	Min	mm	Pearce, Richard B		Nannofossil-rich
18	Range, maximum	Max	mm	Pearce, Richard B		Nannofossil-rich
19	Group	Group		Pearce, Richard B		lamina associations

License:

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

Size:

372 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Event	2 Sample label	3 Thick [mm]	4 No (T. longissima-rich)	5 Thick [mm] (T. longissima-rich, mean)	6 Std dev [±] (T. longissima-rich, thickness)	7 Min [mm] (T. longissima-rich)	8 Max [mm] (T. longissima-rich)	9 No (Mixed-assemblage)	10 Thick [mm] (Mixed-assemblage, mean)	11 Std dev [±] (Mixed-assemblage, thickness)	12 Min [mm] (Mixed-assemblage)	13 Max [mm] (Mixed-assemblage)	14 No (Nannofossil-rich)	15 Thick [mm] (Nannofossil-rich, mean)	16 Std dev [±] (Nannofossil-rich, thickness)	17 Min [mm] (Nannofossil-rich)	18 Max [mm] (Nannofossil-rich)	19 Group (lamina associations)
138-844B	138-844B-12H-7,24-32	1.85	6	0.165	0.070	0.10	0.30						5	0.110	0.050	0.05	0.20	B
138-844B	138-844B-12H-7,24-32	2.00	6	0.225	0.140	0.10	0.50	4	0.050	0.000	0.050		2	0.200	0.100	0.10	0.30	A, B
138-844B	138-844B-12H-7,24-32	2.76	10	0.130	0.090	0.05	0.35	6	0.170	0.070	0.075	0.25	4	0.245	0.165	0.08	0.50	A, B
138-844B	138-844B-12H-7,24-32	3.80	8	0.330	0.130	0.15	0.75	7	0.165	0.050	0.100	0.20						A
138-844B	138-844B-12H-7,75-79	4.70	6	0.425	0.140	0.20	1.25	6	0.325	0.140	0.150	0.40						A
138-844B	138-844B-12H-7,75-79	1.60	5	0.180	0.070	0.10	0.30	5	0.120	0.050	0.050	0.20						A
138-844B	138-844B-12H-7,75-79	3.50	6	0.460	0.125	0.25	0.60	5	0.120	0.070	0.125	0.30						_
138-844B	138-844B-12H-7,75-79	4.35	8	0.430	0.155	0.20	0.70	8	0.080	0.030	0.025	0.10						A
138-844B	138-844B-14H-6,143-149	7.75	9	0.640	0.740	0.15	2.40	8	0.250	0.200	0.050	0.65						A
138-844B	138-844B-20H-5,46-51	4.45	5	0.870	0.875	0.15	2.50	4	0.115	0.040	0.050	0.15						A
138-844B	138-844B-20H-5,46-51	1.55	4	0.240	0.055	0.15	0.30	4	0.080	0.020	0.050	0.10						A
138-844C	138-844C-8H-2,125-130	2.75	6	0.210	0.105	0.10	0.40	5	0.280	0.135	0.150	0.55						A
138-844C	138-844C-8H-3,13-17	7.75	5	0.640	0.385	0.10	1.25	4	0.075	0.020	0.050	0.10						A
138-844C	138-844C-8H-3,13-17	3.75	5	1.330	0.435	1.00	2.15	6	0.125	0.040	0.050	0.15						A
138-844C	138-844C-8H-3,142-150	3.75	5	0.490	0.220	0.15	0.75	4	0.300	0.060	0.200	0.35						A
138-844C	138-844C-8H-5,20-25	5.50	9	0.245	0.140	0.10	0.55	9	0.145	0.105	0.050	0.35						A
138-847B	138-847B-15H-7,39-49	3.46	11	0.365	0.265	0.10	1.00	10	0.195	0.140	0.100	0.55						A
138-847C	138-847C-15X-3,110-115	6.30	6	0.900	0.780	0.05	2.00	5	0.180	0.350	0.100	0.45						A
138-847C	138-847C-15X-3,134-144	2.40	7	0.260	0.155	0.15	0.55	6	0.315	0.130	0.175	0.55						A
138-849B	138-849B-19X-6,53-66	3.54	6	0.415	0.170	0.25	0.75	5	0.210	0.085	0.100	0.35
138-849B	138-849B-19X-6,53-66	5.00	9	0.430	0.315	0.05	0.95	9	0.125	0.115	0.050	0.40						A
138-849B	138-849B-19X-6,53-66	5.62	9	0.500	0.215	0.10	0.80	8	0.140	0.010	0.050	0.35						A
138-849B	138-849B-19X-6,53-66	9.36	13	0.575	0.365	0.10	1.45	12	0.155	0.010	0.050	0.35						A
138-849B	138-849B-19X-6,53-66	7.74	10	0.665	0.350	0.20	1.40	9	0.115	0.080	0.050	0.25						A
138-849D	138-849D-23X-6,31-39	7.25	7	0.300	0.300	0.10	1.00						7	1.130	0.870	0.20	1.35	B
138-849D	138-849D-23X-6,31-39	7.78	8	0.155	0.100	0.05	0.40	7	0.265	0.105	0.100	0.40						A
138-850B	138-850B-20X-7,25-27	18.00	15	0.775	0.530	0.15	2.00	15	0.125	0.060	0.050	0.20						A
138-851E	138-851E-28X-2,104-112	25.55	33	0.710	0.845	0.05	4.00	29	0.115	0.120	0.025	0.70						A