Citation:

odp.proc.sr.171B.123.2001

Name: (Table T1) Correlations between marker beds and drill holes for ODP Leg 171B sites
Published: 2001
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

More than 50 discrete volcanic ash layers were recovered at the five drill sites of the Blake Nose depth transect (Leg 171B, western central Atlantic). The majority of these ash layers are intercalated with Eocene hemipelagic sediments with a pronounced frequency maximum in the upper Eocene. Several ash layers appear to be deposited from volcanic fallout with little or no indication of secondary remobilization. They provide excellent stratigraphic markers for a correlation of the Leg 171B drill sites. Other ash layers were probably redeposited from volcaniclastic-rich turbidity currents, but they still represent geologically instantaneous events that can be used in stratigraphic correlation between adjacent drill holes. Additional nonvolcanic marker beds, like the suspect late Eocene impact event layer, were included in our hole-to-hole correlations. Stratigraphic and downcore positions of marker beds were compiled and plotted against existing composite depth records that were constructed to guide high-resolution sampling. Comparison of our correlation with the spliced composite sections of each drill site reveals several minor and some major discrepancies. These may result from drilling distortion or missing sections, from the lack of unambiguous criteria for the synchronism of ash layers, or from the systematic exclusion of marker-bed data in the construction of the spliced record. Integration of both correlation approaches will help eliminate most of the observed discrepancies.

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Median Latitude: 30.047783 * Median Longitude: -76.371033 * South-bound Latitude: 29.951333 * West-bound Longitude: -76.626778 * North-bound Latitude: 30.142333 * East-bound Longitude: -76.112111

Date/Time Start: 1997-01-13T00:00:00 * Date/Time End: 1997-02-06T00:00:00

Minimum DEPTH, sediment/rock: 2.625 m * Maximum DEPTH, sediment/rock: 404.190 m

Event(s):

171-1049 * Latitude: 30.142333 * Longitude: -76.112111 * Date/Time: 1997-01-13T00:00:00 * Elevation: -2665.9 m * Penetration: 507.3 m * Recovery: 274.8 m * Location: Blake Nose, North Atlantic Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 48 cores; 414.1 m cored; 93.2 m drilled; 66.4% recovery

171-1050 * Latitude: 30.099944 * Longitude: -76.234972 * Date/Time: 1997-01-17T00:00:00 * Elevation: -2298.7 m * Penetration: 1165.9 m * Recovery: 713.3 m * Location: Blake Nose, North Atlantic Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 94 cores; 848.4 m cored; 317.5 m drilled; 84.1% recovery

171-1051 * Latitude: 30.053000 * Longitude: -76.357750 * Date/Time: 1997-01-21T00:00:00 * Elevation: -1981.6 m * Penetration: 1171.2 m * Recovery: 1108.1 m * Location: Blake Nose, North Atlantic Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 134 cores; 1160.9 m cored; 10.3 m drilled; 95.4% recovery

Comment:

DEPTH, sediment and depth, reference is given in mbsf.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	DEPTH, sediment/rock	Depth sed	m			Geocode
3	Code	Code		Pletsch, Thomas
4	Sample code/label	Sample label		Pletsch, Thomas	DSDP/ODP/IODP sample designation
5	Depth, reference	Depth ref	m	Pletsch, Thomas		Sample code 1
6	Depth, composite	Depth comp	mcd	Pletsch, Thomas		Sample code 1
7	Sample code/label 2	Sample label 2		Pletsch, Thomas	DSDP/ODP/IODP sample designation	2-1
8	Depth, reference	Depth ref	m	Pletsch, Thomas		Sample code 2-1; # = 47.95-51.80 m
9	Depth, composite	Depth comp	mcd	Pletsch, Thomas		Sample code 2-1; # = 52.80-56.70 m
10	Sample code/label 2	Sample label 2		Pletsch, Thomas	DSDP/ODP/IODP sample designation	2-2
11	Depth, reference	Depth ref	m	Pletsch, Thomas		Sample code 2-2
12	Depth, composite	Depth comp	mcd	Pletsch, Thomas		Sample code 2-2
13	Sample code/label 2	Sample label 2		Pletsch, Thomas	DSDP/ODP/IODP sample designation	2-3
14	Depth, reference	Depth ref	m	Pletsch, Thomas		Sample code 2-3
15	Depth, composite	Depth comp	mcd	Pletsch, Thomas		Sample code 2-3
16	Depth, composite error	Depth comp e	mcd	Pletsch, Thomas		mismatch
17	Sample comment	Sample comment		Pletsch, Thomas

License:

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

Size:

336 data points

Data

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

1 Event	2 Depth sed [m]	3 Code	4 Sample label	5 Depth ref [m] (Sample code 1)	6 Depth comp [mcd] (Sample code 1)	7 Sample label 2 (2-1)	8 Depth ref [m] (Sample code 2-1; # = 47.95-51...)	9 Depth comp [mcd] (Sample code 2-1; # = 52.80-56...)	10 Sample label 2 (2-2)	11 Depth ref [m] (Sample code 2-2)	12 Depth comp [mcd] (Sample code 2-2)	13 Sample label 2 (2-3)	14 Depth ref [m] (Sample code 2-3)	15 Depth comp [mcd] (Sample code 2-3)	16 Depth comp e [mcd] (mismatch)	17 Sample comment
171-1049	38.960	49A	171B-1049A-5H-6,5-6	47.16	33.10	171B-1049B-3H-CC,10-11	30.760	30.76							2.34	Vitric ash
171-1049	47.540	49B	171B-1049A-6H-4,54-58	54.18	40.12	171B-1049B-5H-1,87-90	40.900	40.90							0.78	Vitric ash, biotite
171-1049	45.035	49C	171B-1049B-5H-4,73-76	45.26	45.26	171B-1049C-5H-4,25-31	44.810	44.81							0.45	Vitric ash
171-1050	6.565	50A	171B-1050A-1X-5,12-15	6.15	6.99	171B-1050B-1X-5,95-98	6.980	6.98							0.01	Vitric ash, biotite
171-1050	59.140	50B	171B-1050A-7H-1,129-130	58.90	61.31	171B-1050B-7H-4,37-38	59.380	61.32							0.01	Vitric ash, opaques
171-1050	100.070	50D	171B-1050A-11X-5,15-16	101.76	106.32	171B-1050B-11X-6,27-28	98.380	103.12							3.20	Vitric ash
171-1050	128.095	50F	171B-1050A-14X-4,139-140	130.30	134.66	171B-1050B-14X-5,48-49	125.890	130.63							4.03	Vitric ash, rare brown glass
171-1050	154.300	50G	171B-1050A-16X-7,42-48	153.08	157.39	171B-1050B-17X-6,24-32	155.520	157.74							0.35	Altered ash, hardground
171-1050	189.820	50K	171B-1050A-21X-1,59-60	190.20	193.91	171B-1050B-22X-2,133-134	189.440	189.05							4.86	Vitric ash, abundant biotite
171-1051	83.720	51E	171B-1051A-9H-6,120-121	81.01	91.37	171B-1051B-10H-4,111-113	86.430	91.94							0.57	Vitric ash
171-1051	88.065	51F	171B-1051A-10H-4,61-62	86.92	97.28	171B-1051B-11H-2,39-41	89.210	97.96							0.68	Vitric ash
171-1051	188.005	51I	171B-1051A-20X-7,34-36	186.76	199.70	171B-1051B-21X-6,3-5	189.250	200.55							0.83	Vitric ash
171-1051	238.705	51J	171B-1051A-26X-3,60-63	238.63	254.58	171B-1051B-26X-7,6-8	238.780	254.67							0.09	Vitric ash
171-1051	301.120	51L	171B-1051A-32X-5,141-143	300.03	319.51	171B-1051B-33X-6,109-111	302.210	318.96							0.55	Vitric ash
171-1051	304.820	51M	171B-1051A-33X-1,132-134	303.54	322.97	171B-1051B-34X-2,138-140	306.100	322.84							0.13	Vitric ash
171-1051	318.085	51N	171B-1051A-34X-5,118-119	318.99	338.42	171B-1051B-36X-3,126-128	317.180	335.61							2.81	Vitric ash
171-1051	319.485	51O	171B-1051A-34X-7,8-10	320.40	339.83	171B-1051B-36X-4,115-117	318.570	337.00							2.83	Vitric ash
171-1051	378.240	51R	171B-1051A-41X-1,75-78	380.08	398.17	171B-1051B-43X-1,10-30	376.400	397.50							0.67	Bentonite, Fe-oxides
171-1051	402.050	51T	171B-1051A-43X-1,132-133	400.83	418.62	171B-1051B-47X-3,95-97	403.270	418.99							0.37	Vitric ash
171-1051	404.190	51U	171B-1051A-43X-3,51-53	403.83	420.82	171B-1051B-47X-4,73-75	404.550	420.27							0.55	Vitric ash, biotite
171-1052	10.760	52B	171B-1052B-2H-3,88-91	8.91	10.99	171B-1052C-1H-7,19-20	9.200	10.96	171B-1052D-2H-3,117-118	13.68	10.66	171B-1052D-2H-2,20-25	11.25	10.9	0.33	Vitric ash, biotite
171-1052	12.080	52C	171B-1052B-2H-5,63-68	11.68	13.76	171B-1052C-2H-1,84-90	10.400	13.01	171B-1052D-2H-4,13-16	14.16	13.82				0.81	Vitric ash
171-1052	20.823	52D	171B-1052A-3H-3,78-80	19.82	23.06	171B-1052B-3H-4,90-95	19.950	23.19	171B-1052F-3H-3,65-70	22.70	23.40				0.34	Vitric ash
171-1052	23.200	52E	171B-1052A-3H-CC,5-7	22.63	26.03	171B-1052B-3H-7,25-27	23.770	27.01							0.98	Vitric ash
171-1052	28.803	52F	171B-1052A-4H-5,6-8	28.78	30.61	171B-1052B-4H-3,87-88	27.880	30.46	171B-1052F-4H-1,124-125	29.75	30.46				0.15	Vitric ash
171-1052	39.927	52G	171B-1052A-5H-5,59-61	38.81	42.14	171B-1052B-5H-4,115-120	39.240	42.21	171B-1052F-5H-3,69-73	41.73	43.65				1.51	Vitric ash
171-1052	51.105	52H	171B-1052A-6H-6,62-63	49.83	55.75	171B-1052B-6H	49.875	54.75	171B-1052F-6H-5,10-11	53.61	56.08				0.95	Vitric ash, biotite
171-1052	68.207	52I	171B-1052A-8H-5,96-97	67.67	71.44	171B-1052B-9H-3,109-110	66.600	71.69	171B-1052F-8H-3,82-85	70.35	71.70				0.26	Vitric ash
171-1052	71.330	52J	171B-1052B-9H-5,87-88	69.38	74.47	171B-1052F-8H-5,77-78	73.280	74.63							0.16	Vitric ash
171-1052	85.150	52K	171B-1052A-10H-4,70-71	84.91	88.93	171B-1052B-11H-2,33-34	83.340	88.96	171B-1052F-10H-5,18-20	87.20	88.96				0.03	Vitric ash
171-1052	96.680	52L	171B-1052A-11H-5,106-108	96.28	101.46	171B-1052B-12H-3,72-75	94.750	101.45	171B-1052F-11H-6,92-101	99.01	101.49				0.04	Vitric ash, brown glass
171-1053	2.625	53B	171B-1053A-1H-2,99-102	2.52	2.72	171B-1053B-1H-2,122-123	2.730	2.73							0.01	Vitric ash
171-1053	68.155	53D	171B-1053A-8H-2,76-84	68.84	69.19	171B-1053B-8H-5,50-57	67.470	71.95							2.76	Diatomite, rare glass
171-1053	84.035	53F	171B-1053A-9H-6,121-122	84.72	87.94	171B-1053B-10H-3,42-45	83.350	87.81							0.13	Vitric ash, clear