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CH 19 CH 19 CH 19 CH 34 CH 34 TABLE A2.1. BOTTOM PHOTOGRAPHS (Cont1d.) Crui se Stati on Lat. oN Long. oW 7* 20°08.01 65°58.51 North slope Puerto Rico Trench. Mud bottom to rock outcrops or blocks showing evidence of downslope sediment movement to SW. No current evi dence. Worm burrows, feca 1 coi 1 s, ho 1 othuri an and echinoid trails rare to moderate in abundance. 8* 20°01. 5 i 66°29.51 North slope Puerto Rico Trench. Flat mud bottom strongly corrugated (1-2 cm height) by mostly old echinoid and holothurian trails and fresh worm burrows. No current evidence. 9* 20°00.0' 66°30.0' North slope Puerto Ri co Trench. Rock outcrops and angular blocks with thin sedi ment cover~ No current evi dence or benthic activity. 3 20°16.51 65°46.21 Soft, flat, mud bottom on north slope of Puerto Ri co Trench. No current evi dence. Some echinoid trails and worm burrows. 4 22° 11.0' 66°24.51 Deep on north flank of eastern sector of GAOR. Flat mud bottom weakly corrugated by numerous, mostly obscure, echinoid and holothurian trails. Large ophiuroids, scattered manganese nodules. Little current evidence. 272 Depth (m) 6531 6424 6375 6393 5727 \ . )
) ) CH 36 CH 57 CH 75 KN 25 KN 25 TABLE A2.1. BOTTOM PHOTOGRAPHS (Cont'd~) Cruise Station Lat. oN Long. oW CD1 21°30.0' 66°30.0' North flank of GAOR. Nearly flat mud bottom, smoothed by weak to moderate currents of unknown di recti on. Worm burrows, spoke burrows, obscure trails. 15-1 20°09.0' 65°12.0' Soft, muddy bottom on north slope of Puerto Ri co Trench. No current evidence. Very murky, poor quality photos. 2* 19°29.51 60°46.51 Far eastern end of GAOR. Soft mud bottom wi th manganese nodul es 4-7 cm in diameter on surface. Currents and benthic activity not determinable. K1 * 25°01.51 68°03.51 North side of Vema Gap. Fairly flat, current smoothed, mud bottom wi th few 1 i neati ons s howi ng weak to moderate NW currents. Numerous worm burrows, fewer spoke burrows, plow marks and echinoid trails. K2* 24° 42 . 2 i 68°08.01 North side of Vema Gap. Flat mud bottom smoothed by weak to moderate N to NW currents. Echinoid trails, worm burrows, plow marks, spoke burrows. Unidentified floating holothurian. 273 Depth (m) 5480 6550 5296 5519 5689
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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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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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\ ) \ ì ../
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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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: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
Page 329 and 330: \ ! 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
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Page 339 and 340: ) / the same event of current-contr
Page 341 and 342: ) Figure 8.5. Idealized representat
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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
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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 380 and 381: KN25 KN 25 KN 25 KN 25 TABLE A2.1.
Page 382 and 383: LL 8 LL 8 LL 8 LL 8 LL 8 SA C ru is
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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 411 and 412: ) /) 295 Figure A4.5. Plots of wate
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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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