Citation:

io0775_descriptions.pdf

Name: Annotated record of the detailed examination of Mn deposits from ARA Islas Orcadas Cruise 7 core stations
Published: 1978
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

The purpose of this volume, the seventh in a series of similar publications (Goodell, 1964, 1965, 1968; Frakes 1971, 1973 ; Cassidy et al., 1977), is to continue a presentation to the research community of sediment core descriptions and attendant data of cored and otherwise obtained sediments retrieved in waters of the Southern Ocean aboard the research vessel, ARA Islas Orcadas (formerly, USNS Eltanin), as a part of the circumpolar survey begun by Eltanin in 1962 (see issue of Antarctic Journal of the United States, Vol. 8, No. 3, 1973). The data presented herein are concerned with the results of coring activities aboard cruise 0775 of Islas Orcadas, the second marine geology coring cruise of this vessel under the terms of the present United States-Argentine agreement. The core descriptions are organised as follows: 1) a brief summary of the coring objectives of the cruise, together with a discussion of core recovery; 2) a table and map of station location data for materials retrieved; 3) a table of tentative age-dates for each piston core; 4) an explanation of the laboratory procedures and descriptive criteria used in the description of the sediments, and 5) lithologic descriptions of the piston and trigger cores, and the piston and trigger core bag samples.

Related to:

Glasby, Geoffrey P; Cassidy, D S (1978): Distribution of manganese nodules with depth in sediments of the South Georgia Basin, Falkland (Malvinas) Plateau and adjacent areas. Antarctic Journal of the United States, 13(4), 110-111, glasby-cassidy_1978.pdf

Source:

Grant, John Bruce; Moore, Carla J; Alameddin, George; Chen, Kuiying; Barton, Mark (1992): The NOAA and MMS Marine Minerals Geochemical Database. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V52Z13FT

Further details:

Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V53X84KN

Project(s):

NOAA and MMS Marine Minerals Geochemical Database (NOAA-MMS)

Coverage:

Median Latitude: -51.003615 * Median Longitude: -35.242615 * South-bound Latitude: -57.193000 * West-bound Longitude: -47.512000 * North-bound Latitude: -47.818000 * East-bound Longitude: -20.287000

Date/Time Start: 1975-01-01T00:00:00 * Date/Time End: 1975-01-01T00:00:00

Minimum DEPTH, sediment/rock: 0.000 m * Maximum DEPTH, sediment/rock: 15.600 m

Event(s):

IO0775.002-PC * Latitude: -49.455000 * Longitude: -39.627000 * Date/Time: 1975-01-01T00:00:00 * Elevation: -3336.0 m * Recovery: 11.11 m * Campaign: * Basis: Islas Orcadas * Method/Device: Piston corer (PC)

IO0775.004-PC * Latitude: -47.818000 * Longitude: -37.038000 * Date/Time: 1975-01-01T00:00:00 * Elevation: -5616.0 m * Recovery: 11.42 m * Campaign: * Basis: Islas Orcadas * Method/Device: Piston corer (PC)

IO0775.005-PC * Latitude: -48.853000 * Longitude: -36.555000 * Date/Time: 1975-01-01T00:00:00 * Elevation: -4895.0 m * Recovery: 11.69 m * Campaign: * Basis: Islas Orcadas * Method/Device: Piston corer (PC)

Comment:

From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.

Parameter(s):

#	Name	Short Name	Unit	Method/Device	Comment
1	Event label	Event
2	Latitude of event	Latitude
3	Longitude of event	Longitude
4	Elevation of event	Elevation	m
5	Method/Device of event	Method/Device
6	Identification	ID
7	DEPTH, sediment/rock	Depth sed	m		Geocode
8	Depth, top/min	Depth top	m
9	Depth, bottom/max	Depth bot	m
10	Position	Position		Visual description
11	Deposit type	Deposit type
12	Quantity of deposit	Quantity
13	Size	Size
14	Substrate type	Substrate
15	Sediment type	Sediment
16	Comment	Comment
17	Description	Description

License:

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

Size:

864 data points

Data

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

1 Event	2 Latitude	3 Longitude	4 Elevation [m]	5 Method/Device	6 ID	7 Depth sed [m]	8 Depth top [m]	9 Depth bot [m]	10 Position	11 Deposit type	12 Quantity	13 Size	14 Substrate	15 Sediment	16 Comment	17 Description
IO0775.002-PC	-49.455	-39.627	-3336	Piston corer	IO0775.002-PC-1	0.395	0.00	0.79	Buried	Mn nodule	Several	Up to 5.0 cm		Mud	Sandy, diatomaceous mud, olive gray (5Y 4/1)	Manganese nodules (to 5 cm).
IO0775.002-PC	-49.455	-39.627	-3336	Piston corer	IO0775.002-PC-2	0.395	0.00	0.79	Buried	Mn coating	Several	Up to 2.0 cm	Gravel	Mud	Sandy, diatomaceous mud, olive gray (5Y 4/1)	Iron-manganese concretions (to 2 cm).
IO0775.002-PC	-49.455	-39.627	-3336	Piston corer	IO0775.002-PC-3	1.085	0.79	1.38	In sediment	Mn micronodule	Several			Mud	Sandy mud, light olive gray (5Y 5/2)	Scattered gravel and manganese nodules.
IO0775.002-PC	-49.455	-39.627	-3336	Piston corer	IO0775.002-PC-4	2.720	2.72	2.72	Buried	Mn nodule	Several			Mud	Diatomaceous mud, dusky yellow (5Y 6/4)	Manganese nodules at 272 cm.
IO0775.002-PC	-49.455	-39.627	-3336	Piston corer	IO0775.002-PC-5	2.880	2.88	2.88	Buried	Mn nodule	Several			Mud	Diatomaceous mud, dusky yellow (5Y 6/4)	Manganese nodules at 288 cm.
IO0775.004-PC	-47.818	-37.038	-5616	Piston corer	IO0775.004-PC-1	2.055	0.40	3.71	In sediment	Mn micronodule	Several			Mud	Mud, light olive gray (5Y 6/1); slightly bioturbated	Micromanaanese nodules increasing with depth.
IO0775.004-PC	-47.818	-37.038	-5616	Piston corer	IO0775.004-PC-2	5.650	5.65	5.65	Buried	Mn nodule	1			Mud	Diatomaceous mud, pale yellowish brown (10 YR 6/2)	Manganese nodule at 565 cm.
IO0775.004-PC	-47.818	-37.038	-5616	Piston corer	IO0775.004-PC-3	10.250	10.25	10.25	Buried	Mn nodule	1			Mud	Diatomaceous mud, pale yellowish brown (10 YR 6/2)	Manganese nodule at 1025 cm.
IO0775.004-PC	-47.818	-37.038	-5616	Piston corer	IO0775.004-PC-4	6.825	4.00	9.65	Buried	Mn coating	Several	3.0 cm	Gravel	Mud	Diatomaceous mud, pale yellowish brown (10 YR 6/2)	Manganese-coated gravel (3 cm).
IO0775.005-PC	-48.853	-36.555	-4895	Piston corer	IO0775.005-PC-1	0.275	0.00	0.55	Buried	Mn coating	Several	1.0 cm	Rock fragment	Ooze	Muddy, diatomaceous ooze, color varies from dark yellowish brown (10YR 4/2) at top to moderate yellowish brown (10YR 5/4) at bottom; mottled	Scattered rock fragments with manganese coating (to 1 cm)
IO0775.005-PC	-48.853	-36.555	-4895	Piston corer	IO0775.005-PC-2	0.275	0.00	0.55	In sediment	Mn micronodule	Several			Ooze	Muddy, diatomaceous ooze, color varies from dark yellowish brown (10YR 4/2) at top to moderate yellowish brown (10YR 5/4) at bottom; mottled	Scattered micromanganese nodules.
IO0775.005-PC	-48.853	-36.555	-4895	Piston corer	IO0775.005-PC-3	1.645	0.55	2.74	In sediment	Mn micronodule	Several			Mud	Diatomaceous mud, moderate yellowish brown (10YR 5/4)	Scattered micromanganese nodules.
IO0775.005-PC	-48.853	-36.555	-4895	Piston corer	IO0775.005-PC-4	1.715	1.68	1.75	Buried	Mn crust	Several		Rock fragment	Mud	Diatomaceous mud, moderate yellowish brown (10YR 5/4)	Rock fragments with manganese encrustations (to 3 cm) between 168 and 175 cm.
IO0775.005-PC	-48.853	-36.555	-4895	Piston corer	IO0775.005-PC-5	1.950	1.90	2.00	Buried	Mn crust	Several		Rock fragment	Mud	Diatomaceous mud, moderate yellowish brown (10YR 5/4)	Rock fragments with manganese encrustations (to 3 cm) between 190 and 200 cm.
IO0775.005-PC	-48.853	-36.555	-4895	Piston corer	IO0775.005-PC-6	7.215	2.74	11.69	In sediment	Mn micronodule	Several			Mud	Mud, color varies from 10YR 5/4 to 10YR 4/2	Scattered micromanganese nodules.
IO0775.005-PC	-48.853	-36.555	-4895	Piston corer	IO0775.005-PC-7	3.975	3.90	4.05	Buried	Mn crust	Several		Rock fragment	Mud	Mud, color varies from 10YR 5/4 to 10YR 4/2	Rock fragments with manganese encrustation from 390 to 405 cm.
IO0775.005-PC	-48.853	-36.555	-4895	Piston corer	IO0775.005-PC-8	4.850	4.85	4.85	Buried	Mn crust	Several		Rock fragment	Mud	Mud, color varies from 10YR 5/4 to 10YR 4/2	Rock fragments with manganese encrustation fat 485 cm.
IO0775.005-PC	-48.853	-36.555	-4895	Piston corer	IO0775.005-PC-9	7.900	7.89	7.91	Buried	Mn nodule	1			Mud	Mud, color varies from 10YR 5/4 to 10YR 4/2	Manganese nodule at 789-791 cm.
IO0775.005-TC	-48.853	-36.555	-4895	Gravity corer	IO0775.005-TC-1	0.270	0.00	0.54	In sediment	Mn micronodule	Several			Mud	Diatomaceous mud, pale yellowish brown (10YR6/2)	Micromanganese nodules scattered throughout.
IO0775.006-PC	-48.703	-35.060	-5087	Piston corer	IO0775.006-PC-1	1.100	1.10	1.10	Buried	Mn nodule	Several	Up to 5.0 cm		Clay	Pelagic clay, pale yellowish brown (10YR 6/2) to dark yellowish brown (10 YR 4/2)	Manganese nodules (to 5 cm) at 110 cm.
IO0775.006-PC	-48.703	-35.060	-5087	Piston corer	IO0775.006-PC-2	1.560	1.44	1.68	Buried	Mn nodule	Several	Up to 5.0 cm		Clay	Pelagic clay, pale yellowish brown (10YR 6/2) to dark yellowish brown (10 YR 4/2)	Manganese nodules (to 5 cm) at 144 to 168 cm.
IO0775.006-PC	-48.703	-35.060	-5087	Piston corer	IO0775.006-PC-3	2.550	2.55	2.55	Buried	Mn nodule	Several	Up to 5.0 cm		Clay	Pelagic clay, pale yellowish brown (10YR 6/2) to dark yellowish brown (10 YR 4/2)	Manganese nodules (to 5 cm) at 255cm.
IO0775.006-PC	-48.703	-35.060	-5087	Piston corer	IO0775.006-PC-4	4.885	4.58	5.19	Buried	Mn nodule	Several	Up to 5.0 cm		Clay	Pelagic clay, pale yellowish brown (10YR 6/2) to dark yellowish brown (10 YR 4/2)	Manganese nodules (to 5 cm) at 458 to 519 cm.
IO0775.006-PC	-48.703	-35.060	-5087	Piston corer	IO0775.006-PC-5	6.300	6.30	6.30	Buried	Mn nodule	Several	Up to 5.0 cm		Clay	Pelagic clay, pale yellowish brown (10YR 6/2) to dark yellowish brown (10 YR 4/2)	Manganese nodules (to 5 cm) at 630 cm.
IO0775.006-PC	-48.703	-35.060	-5087	Piston corer	IO0775.006-PC-6	7.580	7.40	7.76	Buried	Mn nodule	Several	Up to 5.0 cm		Clay	Pelagic clay, pale yellowish brown (10YR 6/2) to dark yellowish brown (10 YR 4/2)	Manganese nodules (to 5 cm) at 740 to 776 cm.
IO0775.007-PC	-47.957	-34.993	-5298	Piston corer	IO0775.007-PC-1	0.380	0.38	0.38	Buried	Mn nodule	1	Fragment		Mud	Diatomaceous mud, 0-89 cm dark yellowish brown (10YR 4/2)	A manganese nodule fragment at 38 cm.
IO0775.007-PC	-47.957	-34.993	-5298	Piston corer	IO0775.007-PC-2	0.500	0.00	1.00	Buried	Mn crust	Several	0.3 cm		Mud	Diatomaceous mud, 0-89 cm dark yellowish brown (10YR 4/2)	Scattered iron-manganese oxide crusts (to 3 mm) from 0 to 100 cm.
IO0775.007-PC	-47.957	-34.993	-5298	Piston corer	IO0775.007-PC-3	1.470	1.28	1.66	In sediment	Mn micronodule	Many			Mud	Diatomaceous mud, light olive brown (5Y 5/6);	Bands of darker sediment from 128 to 166 cm; rich in fine iron-manganese oxide particles.
IO0775.007-TC	-47.957	-34.993	-5298	Gravity corer	IO0775.007-TC-1	0.000	0.00	0.00	Surface	Mn nodule	Several			Mud	Mud, dark yellowish brown (10YR 4/2)	Dessicated manganese nodules at 0-5 cm.
IO0775.007-TC	-47.957	-34.993	-5298	Gravity corer	IO0775.007-TC-2	0.000	0.00	0.00	Surface	Mn coating	Several	0.5 cm	Gravel	Mud	Mud, dark yellowish brown (10YR 4/2)	Scattered gravel (to 0.5 cm) coated with Fe-Mn oxide.
IO0775.011-PC	-49.980	-25.915	-4610	Piston corer	IO0775.011-PC-1	1.450	1.45	1.45	Buried	Mn nodule	1	1.0 cm		Ooze	Diatomaceous ooze, light olive gray (5Y 5/2) to greenish gray (5GY 6/1)	One manganese nodule (1 cm) at 145 cm.
IO0775.011-PC	-49.980	-25.915	-4610	Piston corer	IO0775.011-PC-2	4.005	0.00	8.01	In sediment	Mn micronodule	Several			Ooze	Diatomaceous ooze, light olive gray (5Y 5/2) to greenish gray (5GY 6/1)	Scattered micromanganese nodules.
IO0775.011-PC	-49.980	-25.915	-4610	Piston corer	IO0775.011-PC-3	9.450	9.20	9.70	In sediment	Mn micronodule	Several			Ooze	Diatomaceous ooze, light olive gray (5Y 5/2) to moderate olive brown (5Y 4/4)	Some micromanganese nodules; three zones of manganese concentrations between 920 and 970 cm.
IO0775.011-PC	-49.980	-25.915	-4610	Piston corer	IO0775.011-PC-4	13.440	13.14	13.74	In sediment	Mn micronodule	Several			Mud	Diatomaceous mud, grayish olive (10Y 4/2)	Scattered micromanganese nodules.
IO0775.011-PC	-49.980	-25.915	-4610	Piston corer	IO0775.011-PC-5	15.600	15.60	15.60	In sediment	Mn micronodule	Several			Ooze	Diatomaceous ooze, medium light gray (N6) to olive gray (5Y4/1)	Scattered micromanganese nodules; manganese concentration at 1560 cm.
IO0775.012-PC	-49.498	-33.977	-5080	Piston corer	IO0775.012-PC-1	0.525	0.50	0.55	Buried	Mn nodule	Several			Ooze	Muddy, diatomaceous ooze, light olive gray (5Y 5/2)	Manganese nodules from 50 to 55 cm.
IO0775.012-PC	-49.498	-33.977	-5080	Piston corer	IO0775.012-PC-2	1.100	1.00	1.20	Buried	Mn nodule	Several	4.0 cm		Ooze	Diatomaceous ooze, pale yellowish brown (10YR 6/2)	Manganese nodules (to 4 cm) between 100 and 120 cm.
IO0775.012-PC	-49.498	-33.977	-5080	Piston corer	IO0775.012-PC-3	2.775	2.75	2.80	Buried	Mn nodule	Several			Ooze	Diatomaceous ooze, pale yellowish brown (10YR 6/2)	Manganese nodules between 275 and 280 cm.
IO0775.012-TC	-47.855	-33.977	-5080	Gravity corer	IO0775.012-TC-1	0.185	0.00	0.37	In sediment	Mn micronodule	Several			Ooze	Muddy, diatomaceous ooze, light olive gray (5Y 5/2)	Scattered micro-manganese nodules.
IO0775.013-TC	-49.518	-34.970	-4967	Gravity corer	IO0775.013-TC-1	0.170	0.00	0.34	In sediment	Mn micronodule	Several			Ooze	Diatomaceous ooze, light olive gray (5Y 5/2)	Micromanganese nodules scattered throughout.
IO0775.014-PC	-48.802	-35.627	-4989	Piston corer	IO0775.014-PC-1	0.255	0.16	0.35	Buried	Mn coating	Several	Up to 5.0 cm	Pebble	Mud	Mud, moderate yellowish brown (10YR 5/4)	Large pebbles (5 cm) coated with iron-manganese oxide from 16 to 35 cm.
IO0775.014-PC	-48.802	-35.627	-4989	Piston corer	IO0775.014-PC-2	1.150	1.15	1.15	Buried	Mn coating	Several	Up to 5.0 cm	Pebble	Mud	Mud, moderate yellowish brown (10YR 5/4)	Large pebbles (5 cm) coated with iron-manganese oxide at 115 cm.
IO0775.014-PC	-48.802	-35.627	-4989	Piston corer	IO0775.014-PC-3	1.820	1.82	1.82	Buried	Mn coating	Several	Up to 5.0 cm	Fragment; shale	Mud	Mud, moderate yellowish brown (10YR 5/4)	A shale clast (5 cm) coated with iron-manganese oxide at 182 cm.
IO0775.014-TC	-48.802	-35.627	-4989	Gravity corer	IO0775.014-TC-1	0.000	0.00	0.00	Surface	Mn nodule	1	4.0 cm		Ooze	Diatomaceous ooze, light gray (N7)	A 4 cm diameter Mn nodule
IO0775.015-PC	-49.523	-36.037	-4707	Piston corer	IO0775.015-PC-1	1.500	1.50	1.50	Buried	Mn nodule	1			Mud	Diatomaceous mud, yellowish gray (5Y 7/2)	Manganese nodule at 150.
IO0775.015-PC	-49.523	-36.037	-4707	Piston corer	IO0775.015-PC-2	3.000	3.00	3.00	Buried	Mn nodule	1			Mud	Diatomaceous mud, yellowish gray (5Y 7/2)	Manganese nodule at 300.
IO0775.015-PC	-49.523	-36.037	-4707	Piston corer	IO0775.015-PC-3	5.000	5.00	5.00	Buried	Mn nodule	1			Mud	Diatomaceous mud, yellowish gray (5Y 7/2)	Manganese nodule at 500.
IO0775.015-PC	-49.523	-36.037	-4707	Piston corer	IO0775.015-PC-4	3.490	0.00	6.98	In sediment	Mn micronodule	Several			Mud	Diatomaceous mud, yellowish gray (5Y 7/2)	Some scattered micromanganese nodules.
IO0775.015-TC	-49.523	-36.037	-4707	Gravity corer	IO0775.015-TC-1	0.225	0.12	0.33	In sediment	Mn micronodule	Several			Ooze	Diatomaceous ooze, moderate yellowish brown (10YR 5/4)	Scattered micromanganese nodules.
IO0775.016-PC	-50.608	-31.767	-4440	Piston corer	IO0775.016-PC-1	4.770	4.34	5.20	In sediment	Mn micronodule	Few			Mud	Diatomaceous mud, grayish olive (10Y 4/2)	Some scattered micro-manganese nodules.
IO0775.016-TC	-50.608	-31.767	-4440	Gravity corer	IO0775.016-TC-1	0.025	0.01	0.04	Buried	Mn coating	Several	1.0-4.0 cm	Gravel	Ooze	Diatomaceous ooze, light olive gray (5Y 5/2), volcanic ash scattered throughout	2.5 cm subrounded gravel with manganese oxide coating between 1-4 cm.
IO0775.017-PC	-50.968	-24.665	-4139	Piston corer	IO0775.017-PC-1	0.520	0.52	0.52	Buried	Mn nodule	Several	Up to 9.0 cm		Ooze	Diatomaceous ooze, dusky yellow (5Y 6/4) to light olive gray (5Y 5/2)	Manganese nodules (to 9 cm) at 52 cm.
IO0775.017-PC	-50.968	-24.665	-4139	Piston corer	IO0775.017-PC-2	2.265	1.89	2.64		Mn nodule	Several	Up to 9.0 cm		Ooze	Diatomaceous ooze, dusky yellow (5Y 6/4) to light olive gray (5Y 5/2)	Manganese nodules (to 9 cm) from 189 to 264 cm
IO0775.017-PC	-50.968	-24.665	-4139	Piston corer	IO0775.017-PC-3	5.560	4.30	6.82		Mn nodule	Several	Up to 9.0 cm		Ooze	Diatomaceous ooze, dusky yellow (5Y 6/4) to light olive gray (5Y 5/2)	Manganese nodules (to 9 cm) from 430 to 682 cm.
IO0775.017-PC	-50.968	-24.665	-4139	Piston corer	IO0775.017-PC-4	9.065	7.74	10.39		Mn nodule	Several	Up to 9.0 cm		Ooze	Diatomaceous ooze, dusky yellow (5Y 6/4) to light olive gray (5Y 5/2)	Manganese nodules (to 9 cm) from 774 to 1039 cm.
IO0775.017-PC	-50.968	-24.665	-4139	Piston corer	IO0775.017-PC-5	5.660	0.00	11.32	In sediment	Mn micronodule	Several			Ooze	Diatomaceous ooze, dusky yellow (5Y 6/4) to light olive gray (5Y 5/2)	Scattered micromanganese nodules
IO0775.018-PC	-51.615	-27.400	-4194	Piston corer	IO0775.018-PC-1	0.125	0.00	0.25	In sediment	Mn micronodule	Several			Ooze	Diatomaceous ooze, moderate yellowish brown (10YR 5/4)	Scattered micromanganese nodules.
IO0775.018-PC	-51.615	-27.400	-4194	Piston corer	IO0775.018-PC-2	4.520	4.52	4.52	Buried	Mn nodule	1	Fragment		Mud	Diatomaceous mud, grayish olive (10Y 4/2)	Manganese nodule fragment at 452 cm.
IO0775.018-TC	-51.615	-27.400	-4194	Gravity corer	IO0775.018-TC-1	0.225	0.18	0.27	Buried	Mn coating	Several	1.0 cm	Gravel; igneous, siltstone, scoria	Ooze	Muddy, diatomaceous ooze, light olive gray (5Y 5/2) volcanic ash scattered throughout	Gravel (ferromanganese oxide stained igneous, siltstone, scoria) up to 1 cm between 18-27 cm.
IO0775.021-PC	-52.592	-27.273	-4639	Piston corer	IO0775.021-PC-1	0.320	0.00	0.64	In sediment	Mn micronodule	Many			Ooze	Diatomaceous ooze, dark yellowish brown (10YR 4/2)	Micromanganese nodules increasing toward base of unit.
IO0775.021-PC	-52.592	-27.273	-4639	Piston corer	IO0775.021-PC-2	2.040	1.12	2.96	Buried	Mn coating	Several	Up to 6.0 cm	Gravel	Ooze	Muddy, diatomaceous ooze, light olive gray (5Y5/2)	Subangular gravel (to 6 cm) coated with iron-manganese oxide from 112 to 296 cm.
IO0775.021-PC	-52.592	-27.273	-4639	Piston corer	IO0775.021-PC-3	2.050	0.64	3.46	In sediment	Mn micronodule	Several			Ooze	Muddy, diatomaceous ooze, light olive gray (5Y5/2)	Scattered micromanganese nodules.
IO0775.021-PC	-52.592	-27.273	-4639	Piston corer	IO0775.021-PC-4	7.140	3.46	10.82	In sediment	Mn micronodule	Several			Mud	Diatomaceous mud, moderate yellowish brown (10YR 5/4) to dusky yellow (5Y 6/4)	Scattered micromanganese nodules.
IO0775.021-TC	-52.592	-27.273	-4639	Gravity corer	IO0775.021-TC-1	0.145	0.13	0.16	Buried	Mn coating	Several	2.5 cm	Fragment; shale	Ooze	Muddy, diatomaceous ooze, dark yellowish brown (10YR 4/2); volcanic ash scattered throughout	2.5 cm ferromanganese coated shale between 13-16 cm, brownish black (5YR 2/1)
IO0775.025-PC	-56.578	-20.287	-5014	Piston corer	IO0775.025-PC-1	6.850	4.50	9.20	In sediment	Mn micronodule	Many			Ooze	Diatomaceous ooze, color varies from light olive gray (5Y5/2) to medium gray (N5)	Micromanganese nodule rich zones from 450 to 920 cm.
IO0775.025-TC	-56.578	-20.287	-5014	Gravity corer	IO0775.025-TC-1	0.015	0.00	0.03	In sediment	Mn rich layer	1			Ooze	Diatomaceous ooze, dusky yellowish brown (10YR 2/2),and light olive gray (5Y 5/2)	Heavy staining of ferromanganese oxide between 0-3 cm
IO0775.027-TC	-57.045	-23.572	-5020	Gravity corer	IO0775.027-TC-1	0.040	0.00	0.08	In sediment	Mn rich layer	1			Ooze	Diatomaceous ooze, light olive gray (5Y 5/2), and dusky yellowish brown (10YR 2/2)	Highly stained with ferromanganese oxide between 0-4 cm and 6-8 cm
IO0775.029-PC	-57.193	-25.493	-3504	Piston corer	IO0775.029-PC-1	0.100	0.00	0.20	In sediment	Mn micronodule	Many			Ooze	Diatomaceous ooze, olive gray (5Y 3/2) and light olive gray (5Y 5/2); scattered pumice, size to 2 mm	Scattered micromanganese nodules, and also laminae of micromanganese nodules.
IO0775.033-PC	-55.193	-30.440	-4623	Piston corer	IO0775.033-PC-1	2.025	1.60	2.45	In sediment	Mn micronodule	Several			Mud	Diatomaceous mud, dark yellowish brown (10YR 4/2)	Scattered micromanganese nodules.
IO0775.033-TC	-55.193	-30.440	-4623	Gravity corer	IO0775.033-TC-1	0.140	0.00	0.28	In sediment	Mn micronodule	Several			Ooze	Diatomaceous ooze, dark yellowish brown (10YR 4/2)	Scattered micromanganese nodules in upper part of unit.
IO0775.038-PC	-52.430	-42.175	-3603	Piston corer	IO0775.038-PC-1	4.020	2.36	5.68	In sediment	Mn micronodule	Several			Ooze	Muddy, diatomaceous ooze, grayish olive (10Y4/2); increasing quartz content with depth	Some scattered micromanganese nodules.
IO0775.040-TC	-50.303	-43.417	-1605	Gravity corer	IO0775.040-TC-1	0.205	0.16	0.25	In sediment	Mn micronodule	Many			Ooze	Diatomaceous, calcareous ooze, olive gray (5Y 4/1)	Abundant micromanganese nodules scattered throughout.
IO0775.042-TC	-49.868	-43.630	-2621	Gravity corer	IO0775.042-TC-1	0.150	0.09	0.21	In sediment	Mn micronodule	Many			Mud	Diatomaceous mud, light olive gray (5Y 5/2)	Abundant micromanganese nodules scattered throughout lower part of unit (9-21 cm).
IO0775.043-TC	-50.220	-44.147	-1713	Gravity corer	IO0775.043-TC-1	0.100	0.00	0.20	In sediment	Mn micronodule	Many			Ooze	Calcareous nannofossil ooze; very light gray (N8)	Abundant micromanganese nodules scattered throughout.
IO0775.043-TC	-50.220	-44.147	-1713	Gravity corer	IO0775.043-TC-2	0.240	0.20	0.28	In sediment	Mn micronodule	Many			Ooze	Diatomaceous ooze, grayish olive (10Y 4/2)	Abundant micromanganese nodules scattered throughout.
IO0775.044-TC	-50.308	-44.528	-1651	Gravity corer	IO0775.044-TC-1	0.130	0.00	0.26	In sediment	Mn micronodule	Many			Ooze	Calcareous, nannofossi1-foraminiferal ooze, very light gray (N8)	Abundant micromanganese nodules scattered throughout.
IO0775.049-TC	-50.735	-46.337	-1784	Gravity corer	IO0775.049-TC-1	0.115	0.00	0.23	In sediment	Mn micronodule	Many			Ooze	Diatomaceous, calcareous ooze, very light gray (N8)	Abundant micro-manganese nodules scattered throughout.
IO0775.050-PC	-50.858	-46.768	-2344	Piston corer	IO0775.050-PC-1	0.030	0.00	0.06	Buried	Mn nodule	Several	Fragment		Ooze	Sandy, diatomaceous ooze, light olive gray (5Y 5/2)	Fragments of manganese nodules between 0 and 6 cm.
IO0775.050-PC	-50.858	-46.768	-2344	Piston corer	IO0775.050-PC-2	0.375	0.39	0.36	Buried	Mn nodule	Several			Clay	Pelagic clay, yellowish gray (5Y 7/2) to dusky yellow (5Y 6/4	Manganese nodules from 39 to 46 cm.
IO0775.050-PC	-50.858	-46.768	-2344	Piston corer	IO0775.050-PC-3	0.620	0.61	0.63	Buried	Mn nodule	Several			Clay	Pelagic clay, yellowish gray (5Y 7/2) to dusky yellow (5Y 6/5	Manganese nodules from 61 to 63 cm.
IO0775.052-PC	-50.912	-46.833	-2558	Piston corer	IO0775.052-PC-1	0.145	0.13	0.16	Buried	Mn nodule	Several			Sand	Glauconitic sand, top half olive black (5Y 2/1), and bottom half olive gray (5Y 3/2)	Manganese nodules from 13 to 16 cm.
IO0775.052-PC	-50.912	-46.833	-2558	Piston corer	IO0775.052-PC-2	0.475	0.45	0.50	Buried	Mn nodule	Several			Sand	Glauconitic sand, top half olive black (5Y 2/1), and bottom half olive gray (5Y 3/2)	Manganese nodules from 45 to 50 cm.
IO0775.052-PC	-50.912	-46.833	-2558	Piston corer	IO0775.052-PC-3	0.580	0.56	0.60	Buried	Mn nodule	Several			Sand	Glauconitic sand, top half olive black (5Y 2/1), and bottom half olive gray (5Y 3/2)	Manganese nodules from 56 to 60 cm.
IO0775.052-PC	-50.912	-46.833	-2558	Piston corer	IO0775.052-PC-4	1.225	1.20	1.25	Buried	Mn nodule	1			Ooze	Radiolarian, diatomaceous ooze, yellowish gray (5Y7/2), and light olive brown (5Y 5/6)	Manganese nodule from 120 to 125 cm.
IO0775.052-PC	-50.912	-46.833	-2558	Piston corer	IO0775.052-PC-5	1.312	1.28	1.34	Buried	Mn nodule	1			Ooze	Muddy, diatomaceous ooze, olive black (5Y 2/1)	Oxidized manganese nodule with botryoidal structure, brown black (5YR2/1), from 128 to 134.5 cm.
IO0775.053-TC	-50.867	-46.610	-2229	Gravity corer	IO0775.053-TC-1	0.075	0.00	0.15	In sediment	Mn micronodule	Many			Ooze	Diatomaceous, calcareous nannofossil ooze, very light gray (N8)	Abundant micromanganese nodules.
IO0775.053-TC	-50.867	-46.610	-2229	Gravity corer	IO0775.053-TC-2	0.295	0.27	0.32	In sediment	Mn micronodule	Many			Ooze	Calcareous ooze, very light gray (N8)	Intercalated with abundant micro-manganese nodules at 27-32 cm.
IO0775.056-PC	-50.583	-47.453	-2637	Piston corer	IO0775.056-PC-1	0.000	0.00	0.00	Surface	Mn nodule	1	6.0 cm		Mud	Mud matrix rich in manganese oxide and containing some foraminifera	Manganese nodule (6 cm), black (N1)
IO0775.056-PC	-50.583	-47.453	-2637	Piston corer	IO0775.056-PC-2	0.000	0.00	0.00	Surface	Mn coating	Several		Pebble	Mud	Mud matrix rich in manganese oxide and containing some foraminifera	Some pebbles coated with manganese oxide.
IO0775.057-PC	-50.582	-47.512	-2525	Piston corer	IO0775.057-PC-1	0.420	0.42	0.42	Buried	Mn nodule	1	Large		Sand	Gravelly, diatomaceous sand, dark yellowish brown (10YR 4/2)	A large manganese nodule at base of unit.
IO0775.057-PC	-50.582	-47.512	-2525	Piston corer	IO0775.057-PC-2	0.630	0.60	0.66	Buried	Mn staining	1		Consolidated sediment	Mud	Radiolarian, diatomaceous mud, dusky yellow (5Y6/4)	16-42 cm: Gravelly, diatom. sand, dark yellowish brown (10YR 4/2); glauc. + mn nod. at base of unit; grad. contact 60-66 cm: Radiol., diatom. mud, dusky yellow (5Y6/4); cons. mottle rich Mn