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Secti on 1 (Crest) TABLE 6.2. CALCULATED VOLUME TRANSPORTS FOR REFERENCE LEVELS AT 4300 m and 4700 m 15 i 4300 m 4700 m Direc- Di rec- Secti on T* ti on T* t ion NW (A I I 1825-1832 ) 0.7 NE 0.6 NE Middle (AII 1832 -1837) t 0 0 SE (AI I 1837-KN59)t 0.5 NE 0.3 NE Section 2 Vema Gap (KN94-AII 1829) 1. 6 W 1. 2 W N of Ridge (AIl 1829-1832) 0.2 SE 0.2 SE S of Ridge (AIl 1832-1834) 0.2 NW O. 1 NW Secti on 3 N of Ri dge (All 1841-1844) 0.4 SE 0.2 SE S of Ridge (AI I 1844-1845 ) 0.1 NW O. 1 NW ) Secti on 4 N of Ri dge (AI i 1837 -1840) t 0.7 SE 0.3 SE S of Ridge ( All 1835-1837) t 0.1 SE O. 1 SE Section 5 N of Ridge (KN54-59) 0.5 SE 0.4 SE S of Ridge (KN59-62) 0.3 NW 0.3 NW Section 6 Caicos Outer Ridge (KN224-229) 1. 2 SE O. 7 SE * Transport vaèu3s are x 106m3/sec and are rounded to nearest 0.1 x 10 m /sec. t Calculations for Station 1837 were made with observed t e m per a t u res, but s a 1 i nit y val u e s we r eta ken fro m the mean e/S curve for the cruise. See text for explanation. . )
,) -) 152 structure persist at and above 4300 m. The potential temperature at 4300 m is 1.91 + 0.04°8 and the salinity is 34.899 + .0060/00, clearly within the NADW, which is generally considered to be moving slowly southward, but near its lower limits according to Wright and Worthington (1970). At 4700 m the potenti a 1 temperature is 1. 84 ~ .04° 8 and the salinity is 34.891 + .0070/00, close to the defined boundary between NADW and AABW. Wright (1970) used a reference level at about 34.89°/00 to calculate the transport of AABW in the western basin of the Atlantic Ocean. In the regi on of the Greater Anti 11 es Outer Ri dge, however, there is some evidence that the NADW and AABW are moving in the same direction, and there may be no motionless level between them. Using the deeper reference surface does not substantially affect the pattern of circulation below that level. The vol ume transports are reduced by amounts up to 40 percent, but the directions are not changed except where the transport is negligible. With either reference level there is a reversal of flow in the shallower water because of the up- ward persistence of the temperature structure, and the reversal is smaller with the shallower level. Uncertainties inherent in the method of dynamic calculations and those introduced by possible measurement errors are such that there is little reason to refine the calculation by using a reference level of varying depth. Clearly the circulation pattern around the Greater Antilles Outer Ridge would be the same with any reasonable
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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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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
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Page 182 and 183: whi ch recorded currents for about
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Page 186 and 187: ottom photographs in February, 1972
Page 188 and 189: Several important features were obs
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Page 206 and 207: 141 turn north in the western part
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Page 212 and 213: 145 bottle spacing. An example is t
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Page 217 and 218: ) ) Figure 6.6. Silicate ("g-atoms/
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Page 227 and 228: ) ) speeds of 2 cm/sec (the stall s
Page 229 and 230: ) I / Fi gure6. 8. 158 Progressi ve
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Page 233: ) ) ~ 160 Figure 6.9. Polar histogr
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Page 239 and 240: ,) B(LOWER) START 22 B(UPPER) START
Page 241 and 242: ) ) Figure 6.11. Polar histogram of
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Page 245 and 246: , ) ) _/ Figure 6.12. 168 Progress
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Page 249 and 250: ) / i I .~J the flow recorded at cu
Page 251 and 252: ) Figure 6.13. Directions and relat
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Page 255: Fig u re 6. 14. i 75 Bottom photogr
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Page 264 and 265: 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
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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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259 approximation of the amount of
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s ~ 0 ~ Q) o '- CO 0 U ~ it \f0 Q)
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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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) ) 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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