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TABLE 4.1. MINERALOGY OF THE c 2 ~m SIZE FRACTION VjP () 3 Horn bl ende - ( 4) Composition(2) M:I:C:K Composition(l) M:I:C:K: oW Long. ° N La t. Sample Depth ( cm) Core No. Greater Anti l1es Outer Ri dge AI I60-8: 2GC 2 23°49.0' 69°31.8' 46:39:10:5 17:60:15:8 .49 x II II 49:37:10:4 11:66:17:6 .37 x AII60-8:6GC 14 23°10.5' 69°18.01 36:44:12:8 12:61: 16: 11 .48 x AI I60-8: 16GC 26 23°27.91 68°33.8' 31:48:13:8 17:57:16:10 .48 x II II AI I60-8: 16GC 86 31:50:14:5 11:63:18:8 .42 x AI I60-8: 19GC 37 22°44.0' 67°53. l 31:49:12:8 11:64: 15: 10 .50 x II II AII60-8: 19GC 153 41:43:11:5 17:60:16:7 .55 x AII60-8:2GC 224 CH57:7PC 817 22°42.3' 67°42.21 18:60:13:9 13:63:14:10 .33 KN25-1: 3GGC 689 22°15.01 67°57.51 41:43':10:6 17:60: 14:9 .47 x KN25-1:4GPC 200 21°30.0' 67°31.0' 43:42:9:6 14:64:13:9 .39 x II II KN25-1:4GPC 548 42:44:10:4 14:66: 14:6 .37 x II II 46:39:8:7 11:65: 13: 11 .45 II II 67:23:6:4 26:53:12:9 .55 II II 54:35:8:3 16:64:14:6 .47 x KN25-1:4GPC 1272 KN25-1:4GPC 1790 KN25-1:4GPC 2020 A282:12HF 10 20°22.0' 67°22.01 35:47:11:7 11:64:15:10 .47 x RC8: 129PC 26 2io21.01 66°08.01 34:48:11:7 11: 64: 15: 10 .42 x CH36:1HP 8 21°08.4' 65°02.51 38:44:9:9 15:60:13:12 .43 x V16: 17PC 12 20°52.5' 64°04.01 35:45:12:8 13:61: 16: 10 .46 Puerto Ri co Trench RC8:128PC 10 19°28.01 65°25. l 51:30:9:10 29:44:12:15 .40 CH57: 1pe 11 20°14.2' 65°21.51 40:40:9:11 21: 53: 11: 15 .60 x A172: 14PC 10 19°54.0' 64°48.0' 47:33:10:10 24:48:13:15 .46 - ~ RC8: 135PC 10 18°55.0' 62°13.51 50:31:8:11 28:45:12:15 .45 - ..
'-j \_-- TABLE 4.1. MINERALOGY OF THE ~ 2 ~m SIZE FRACTION (Cont'd.) Composition(2) M:I:C:K V/P(3) Hornblende(4) Composition(1) M: I : C: K oW Long. ° N Lat. Samp 1 e Depth (cm) Core No. Puerto Ri co Trench (Con It. ) .56 .63 44:22:0:34 69:12:0:19 70:12:0:18 90:4:0:6 20011.41 67038.6' II II 190 265 CH57: 12PC CH57:12PC Caicos Outer Ridge - Silver Bank Apron x x .58 .52 14:60:15:11 16:59:15:10 33:47:12:8 34:46:12:8 18 22°48.0' 71°30.0' 7 20°38.5' 68025.0' KN25-6:1GC AII60-8:24KC Vema Gap - Nares Abyssal Plain x x x .46 .41 .32 .31 9:65:16:10 11:63:17:9 7:68:16:9 12:64:15:9 48:37:9:6 34:47:12:7 35:48:11:6 36: 46 : 11 : 7 68°04.7' 66°29.6' 65°56.0' 63°58.5' 23°54.1' 22°40.7' 23°28.0' 22°46.0' 71 650 13 10 AII60-8:13GC CH57: 5PC V7: 23PC A172: 17PC Bermuda Ri se .68 .37 .48 x 40:35:9:16 18:56:13:13 15:60:13:12 69:18:5:8 55:31:7:7 51:35:7:7 67°56.0' 64°34.0' 67°58.0' 27°05.01 25°29.0' 30°27.0' 12 10 10 A282: 18HF A282: 15HF A282: 23HF 1. N (1) Mineralogical composition computed using the method of Hathaway (1972a). (2) Mineralogical composition computed using the method of Biscaye (1965). (3) Vip is the IIcrystallinity ratioll employed by Biscaye (1965) for montmorillonite. (4) x indicates at least a trace of hornblende is present.
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I "a f IMods Hole '" ~ o c.,,~tlOGR
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parent sediment on the eastern oute
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esearch. 5 )
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Res u 1 ts. . . . . . . . . . . . .
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Figure 3.12 Echo-sounding profile (
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Fi gure 6.14 6. 15 7. 1 7.2 7.3 7.4
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\ I ) Table 4. 1 4.2 5.1 5.2 5.3 6.
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CHAPTER I INTRODUCTION The area inv
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) \ .1 Fi gure i. 1. Bathymetry of
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~. ~ 71° 70° tI 68 fJ0 25° 7' 25
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) ) This is expected since most of
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GENERAL DES CRI PT I ON CHAPTE R I
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j
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egi onal contours. An area centered
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this region. However, all of these
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'"-, i~ 7t 70° 6f 68 67° 25° 72
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Fig u r e 3. 2 . CON RA D 10 s e is
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sequence corresponds to layered tur
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) . .) Figure 3.3. Map showing domi
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"- '''--.- 25° ................. .
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) ) others, 1973), and the upper po
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) Figure 3.5. CONRAD 8 seismic refl
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. Q) 3W/L NOI.L~ l( . (Y CI s. :: 0
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.) Figure 3.6. Idealized profile al
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) ) a: 0 ~ ~ (J L. Z Q) a: ~ lU UJ
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) ) Figure 3.7. CONRAD 10 seismic r
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i- (Y (1 ~:: en or- LL 47
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) ) THE TRANSPARENT LAYER The distr
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Fi gure 3.8. CH A I N 34 s e ism i
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co . (Y (l So :: O' "r- Li 51
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) 53
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) Figure 3.9. CONRAD 10 seismic ref
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0' (V CJ s. :: O' ... LL 55
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\ J ) Figure 3.10. Seismic reflecti
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or- . (V Q) S- :: rn Li 58
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Page 95 and 96: ) ) Figure 3.13. CONRAD 10 seismic
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Page 99 and 100: ) ) GENERAL LITHOLOGY CHAPTER iv TH
Page 101 and 102: ~ , ) Figure 4.1. General lithology
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Page 108 and 109: average of 80% lutite (~ 2 ~m) and
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Page 120 and 121: The laminated zones and overlying p
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Page 127 and 128: ) ) Figure 4.7. Graph of carbonate
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Page 131: ) ì i Figure 4.8. Curves of carbon
Page 134 and 135: currents have transported many Fora
Page 136 and 137: increased dissolution (elevated lys
Page 140 and 141: the following peaks and weighting f
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Page 150 and 151: Obvi ous ly, di 1 uti on of the nor
Page 152 and 153: The m i n era log i c a 1 com po si
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Page 158 and 159: TABLE 5.1. AVERAGE RATES OF SEDIMEN
Page 160 and 161: and thus the T-Z zonation (Fig. 5.1
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Page 164 and 165: TABLE 5.2. AVERAGE RATES OF SEDIMEN
Page 166 and 167: Cl z: c: l/ l. i- c: Cl z: o OJ IX
Page 168 and 169: consolidated (A.J. Silva, pers. com
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Page 174 and 175: in age, and the ash is probably ass
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Page 178 and 179: 122 must result from mixing with th
Page 180 and 181: eas twa rd flow of NADW between 150
Page 182 and 183: whi ch recorded currents for about
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Page 186 and 187: ottom photographs in February, 1972
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Several important features were obs
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141 turn north in the western part
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145 bottle spacing. An example is t
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~() ~ 3.0 ~ ~ ) ~ ~i. ) .. ~ 2.0 ~i
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) ) Figure 6.6. Silicate ("g-atoms/
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) ) ~ 2.2 ~ 2.0 t2 ~ tt ~" 1.8 .. ~
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,) -) 152 structure persist at and
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) ~) 154 Figure 6.7. Current patter
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) ) 72° DEPTH IN CORR. METERS Fi g
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) ) speeds of 2 cm/sec (the stall s
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) I / Fi gure6. 8. 158 Progressi ve
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" ) / ) 10 19 17 5 5616 M 5801 M N
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) ) ~ 160 Figure 6.9. Polar histogr
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,) B(LOWER) START 22 B(UPPER) START
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) ) Figure 6.11. Polar histogram of
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) 2700 ) 00 1800 F; g u re 6. 11 C
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, ) ) _/ Figure 6.12. 168 Progress
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\ --~ E START 21 5 30 12 XI 21 xu )
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) / i I .~J the flow recorded at cu
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) Figure 6.13. Directions and relat
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') ./ ) ,j 70° 68° 66° ~~oo · "
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Fig u re 6. 14. i 75 Bottom photogr
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S e c t ion 2 (F i g s. 6. 1, 6. 7)
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northwest flow along the west flank
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filter (0.50 lJmpore size). After f
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. '! ) ) ,./ 2.2 ~ 2.i () '- 2.0 ~
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) ) Figure 7.3. Light-scattering pr
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'\. './. V 23-7 V 23-6 V 25-74 V 25
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extensive erosion on the lower cont
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) \/ (SEM) to determine composition
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\ ) ) Figure 7.4. 195 Scanning elec
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'i j
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The less than 2 ~m (lutite) fractio
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201 In a sample where additional cl
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TAB LE 7. 1. CALCULATE D CLAY MI NE
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:1 / , ì j
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cannot always be accepted at face v
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The apparent enrichment of chlorite
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in favor of the concept that the su
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on the north flank of the far easte
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that enough suspended matter has be
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The following pages describe a mode
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series of ridges associated with an
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Eocene to 01 i gocene (Monroe, 1968
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(Table 8.1). The interbedded silts
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229 Chase and Hersey, 1968). The th
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\ ! Figure 8.3. 231 Schematic diagr
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Downslope sedimentation covered the
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) 235 Fi gure 8.4. Sketch showi ng
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'\ l ) ~z w u w a: o ~ wz w o u ~ w
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) / the same event of current-contr
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) Figure 8.5. Idealized representat
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) \ ) d / 'I i II I Ii I i I i I I
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) \ ) formed earlier depositional s
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) ) homogenei ty of the sediments o
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) ) 2 ) Sou t h S lop e - P u e rt
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248 Biscaye, P.E. and S.L. Eittreim
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Ericson, D.B., M. Ewing, G. Wollin
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Hersey, J.B. (1965) Sediment pondin
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McCullough, J.R. and G.H. Tupper (1
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Swallow, J.C. and L.V. Worthington
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" ) )
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259 approximation of the amount of
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s ~ 0 ~ Q) o '- CO 0 U ~ it \f0 Q)
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) )
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Crui se All 11 All 11 AII 60 Leg 8
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TABLE A2.1. BOTTOM PHOTOGRAPHS (Con
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TABLE A2.1. BOTTOM PHOTOGRAPHS (Con
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TAB LE A2. 1. BOTTOM PHOTOGRAPHS (C
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CH 19 CH 19 CH 19 CH 34 CH 34 TABLE
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KN25 KN 25 KN 25 KN 25 TABLE A2.1.
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LL 8 LL 8 LL 8 LL 8 LL 8 SA C ru is
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s. .. M i. 0 1. " .. QJ ..- N .. C'
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~.. c. 0' 0 .. Q)+l- ~ 0' 0' 0 ~ M
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TABLE A3.1. SUSPENDED PARTICULATE M
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) -) APPENDIX IV PHYSICAL PROPERTIE
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) ) Figure A4.1. Plots of water con
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) ) C\' 0 § to ~ ~ ~ 0 ~ ~ ~ CI Q:
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) /) 295 Figure A4.5. Plots of wate
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'-. ~, 160 SHEAR STRENGTH 30 50 (g/
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) ) Figure A4.6. Plots of water con
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) , )
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) ) 307 Fi gure A4.11. Plots of wat
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"-, ',, WATER CONTENT (% DRY WEIGHT
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) j 309 Figure A4.12. Plots of wate
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) ) ./
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) 312 WATER CONTENT (%DRY WT) SHEAR
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) J BIOGRAPHY Born: Ma rch 19, 1946
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') \ ) ~UWDATORY DISTRIBUTION LIST
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) J
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UNCLASSI FIED 1/31/74 SECURITY CLAS
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