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LL 8 LL 8 LL 8 LL 8 LL 8 SA C ru is e TABLE A2.1. BOTTOM PHOTOGRAPHS (Conti d.) Station Lat. oN Long. oW 7 20°02.51 65°48.9' North slope of Puerto Rico Trench. Fairly flat, soft, mud bottom smoothed by currents of unknown direction. Holothurians and their trails, fecal coils. 8A* 19°58.7' 65°56.01 North slope of Puerto Rico Trench. Fai rly fl at, soft, mud bottom wi th no current evi dence. Worm burrows, mounds, and tubes. Mi nor N-S undul ati ons. 8B* 19°57.01 65°57.41 Puerto Ri co Trench. Fl at mud bottom wi th few angul ar rocks. Weak current to west. Fecal coils, few trails, ho 10th uri ans. 9* 20°05.6' 65°59.0' North slope of Puerto Ri co Trench. Nearly flat, soft mud bottom. Numerous worm burrows and burrow mounds. Hol othuri ans and tra i 1 s. 11 * 20°05.21 66°00.51 North slope of Puerto Ri co Trench. Soft, fl at mud bottom wi th no current evi dence. Hol othuri an and echi noi d trails, fecal coils, worm burrows. K4* 19°51.01 63°56.01 Floor of Puerto Ri co Trench. Coarsetextured mud bottom wi th 1 i neati ons indicating moderate current to west. Fossil ripple marks (1) oriented NE-SW. Worm tubes and burrows. 276 Depth (m) 7346 7623 8143 7071 7015 7577 )
TABLE A2.1. BOTTOM PHOTOGRAPHS (Cont1d.) Crui se Stati on Lat. oN Long. oW 277 Depth (m) SA K5* 20°04.5' 63°47.0' 6167 North slope of Puerto Rico Trench. Soft mud bottom with worm burrows, spoke burrows, few fecal coils and plow marks, actinarians, one rat-tail fish. SA K6* 20°25.0. 63°47.0' 5009 Crest of eastern GAOR. Fairly flat mud bottom with little current evidence. Scattered, half-buried manganese nodules. Spoke burrows, worm burrows, acorn worm. SA K7* 22°59.0' 63°50.0' 5842 ) Na res Abyssal Plain. Fl at mud bottom ; ) wi th no current evi dence. Fresh to obscure echinoid trails, worm burrows, spoke burrows. WS E7 22°05.0' 68°05.0. -5420 West flank of west-central GAOR. Current-smoothed and lineated, flat mud bottom. Worm burrows and tubes, plow marks. ", 'i , :1
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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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ì ) Figure 3.11. CONRAD 10 seismic
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l UJ .líliiiP',,:... ¡ '"'" ~ ' ~
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) .I Figure 3.12. Echo-soundi ng pr
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N CV OJ s. :: 01 l. 62
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) ) Figure 3.13. CONRAD 10 seismic
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(' r- (' (j $. :: en 'r- LL 64
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) ) GENERAL LITHOLOGY CHAPTER iv TH
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~ , ) Figure 4.1. General lithology
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.'-/ '..-/ AIr 60-8 A II 60-8 An60~
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average of 80% lutite (~ 2 ~m) and
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10 m2, with an average value of 1.3
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The laminated zones and overlying p
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) ) Figure 4.7. Graph of carbonate
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) ) z 0 N O~ E I i ,,_.' i." I ." .
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) ì i Figure 4.8. Curves of carbon
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currents have transported many Fora
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increased dissolution (elevated lys
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TABLE 4.1. MINERALOGY OF THE c 2 ~m
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the following peaks and weighting f
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Obvi ous ly, di 1 uti on of the nor
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The m i n era log i c a 1 com po si
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gray 1 uti t e s per s i s t n ear
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TABLE 5.1. AVERAGE RATES OF SEDIMEN
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and thus the T-Z zonation (Fig. 5.1
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TABLE 5.2. AVERAGE RATES OF SEDIMEN
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Cl z: c: l/ l. i- c: Cl z: o OJ IX
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consolidated (A.J. Silva, pers. com
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) ) _/
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in age, and the ash is probably ass
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122 must result from mixing with th
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eas twa rd flow of NADW between 150
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whi ch recorded currents for about
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,) , ,
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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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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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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
Page 332 and 333: Downslope sedimentation covered the
Page 335 and 336: ) 235 Fi gure 8.4. Sketch showi ng
Page 337 and 338: '\ l ) ~z w u w a: o ~ wz w o u ~ w
Page 339 and 340: ) / the same event of current-contr
Page 341 and 342: ) Figure 8.5. Idealized representat
Page 343 and 344: ) \ ) d / 'I i II I Ii I i I i I I
Page 345 and 346: ) \ ) formed earlier depositional s
Page 347 and 348: ) ) homogenei ty of the sediments o
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Page 352 and 353: 248 Biscaye, P.E. and S.L. Eittreim
Page 354 and 355: Ericson, D.B., M. Ewing, G. Wollin
Page 356 and 357: Hersey, J.B. (1965) Sediment pondin
Page 358 and 359: McCullough, J.R. and G.H. Tupper (1
Page 360 and 361: Swallow, J.C. and L.V. Worthington
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Page 364 and 365: 259 approximation of the amount of
Page 366 and 367: s ~ 0 ~ Q) o '- CO 0 U ~ it \f0 Q)
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Page 370 and 371: Crui se All 11 All 11 AII 60 Leg 8
Page 372 and 373: TABLE A2.1. BOTTOM PHOTOGRAPHS (Con
Page 374 and 375: TABLE A2.1. BOTTOM PHOTOGRAPHS (Con
Page 376 and 377: TAB LE A2. 1. BOTTOM PHOTOGRAPHS (C
Page 378 and 379: CH 19 CH 19 CH 19 CH 34 CH 34 TABLE
Page 380 and 381: KN25 KN 25 KN 25 KN 25 TABLE A2.1.
Page 384 and 385: ) )
Page 386 and 387: s. .. M i. 0 1. " .. QJ ..- N .. C'
Page 388 and 389: ~.. c. 0' 0 .. Q)+l- ~ 0' 0' 0 ~ M
Page 390 and 391: TABLE A3.1. SUSPENDED PARTICULATE M
Page 393 and 394: ) -) APPENDIX IV PHYSICAL PROPERTIE
Page 395: ) ) Figure A4.1. Plots of water con
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Page 409 and 410: ) ) C\' 0 § to ~ ~ ~ 0 ~ ~ ~ CI Q:
Page 411 and 412: ) /) 295 Figure A4.5. Plots of wate
Page 413 and 414: '-. ~, 160 SHEAR STRENGTH 30 50 (g/
Page 415: ) ) Figure A4.6. Plots of water con
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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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) 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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