CRUISE OPERATIONS LOG
OP Log Name: sed-1998-268.html
Year: 1998
Days of Year: 268-271
Vessel: R/V Laurentian
Chief Scientist: Rich MacKenzie
Cruise Track: sed-1998-268.gif
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Time Entered
OP# (GMT) STA LAT LON Activity PI By
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L1998268.01 1700 BHS35 42 28.12 86 38.24 PONAR RAM mud, fine silt
L1998268.02 1711 BHS35 42 28.12 86 38.24 CORE-B RAM core not even, appeared as though we hit a previous box core
L1998268.03 1725 BHS35 42 28.12 86 38.24 CORE-B RAM excellent core, took 3 sub cores, A, B, C, sectioned B
L1998268.04 1745 BHS35 42 28.12 86 38.24 CORE-S RAM core B
L1998268.05 1850 BHS34 42 25.12 86 40.48 CORE-B RAM ok core, waves picking up, resuspending some surface material. Appears to have taken core in a "valley", sectioning core from trench of valley
L1998268.06 1910 BHS34 42 25.12 86 40.48 CORE-S RAM core D, 56.3cm
L1998268.07 2000 BHS33 42 22.12 86 42.36 CORE-B RAM no good
L1998268.08 2018 BHS33 42 22.12 86 42.36 CORE-B RAM excellent core, took sub cores b, c
L1998268.09 2035 BHS33 42 22.12 86 42.36 CORE-S RAM sectioning sub core b, 63cm
L1998268.10 2120 BHS32 42 19.12 86 45.00 CORE-B RAM ok core, lots of critter mounds on surface, mysids, diporeia, tubeficids, took sub core a, b
L1998268.11 2145 BHS32 42 19.12 86 45.00 CORE-S RAM sectioning core a, 49 cm
L1998268.12 2244 BHS31 42 16.12 86 47.24 CORE-B RAM good core, two FeOH layers at about 10-14cm, took sub core a,b,c mysids and worms present
L1998268.13 2315 BHS31 42 16.12 86 47.24 CORE-S RAM sectioning core a, 47 cm
L1998268.14 2356 BHS30 42 13.12 86 49.12 CORE-B RAM good core, two FeOH layers at about 5-10cm , took sub cores a,c
L1998269.01 0023 BHS30 42 13.12 86 49.12 CORE-S RAM sectioning core c, 47cm
L1998269.02 0107 BHS29 42 10.48 86 51.36 CORE-B RAM ok core, some feature creating a slanted surface, took sub cores c and d on upper, even side of slant
L1998269.03 0130 BHS29 42 10.48 86 51.36 CORE-S RAM sectioning core c, 59cm
L1998269.04 0230 BHS22 42 09.10 86 47.24 CORE-B RAM ok core, feature on bottom, appears to have cored thru a trough, took sub cores a,b on left ridge of trough, lots of worm holes
L1998269.05 0254 BHS22 42 09.10 86 47.24 CORE-S RAM used core a, 49 cm
L1998269.06 0339 BHS15 42 07.12 86 43.12 CORE-B RAM excellent core, level surface, took sub cores a,b,c
L1998269.07 0405 BHS15 42 07.12 86 43.12 CORE-S RAM sectioning core a, 47 cm
L1998269.08 0441 BHS08 42 06.00 86 39.36 CORE-B RAM excellent core, level surface, took sub cores a,c
L1998269.09 0506 BHS08 42 06.00 86 39.36 CORE-S RAM sectioning core c, 46 cm, a lot of clam shells (Sphaeridae), some plant material
L1998269.10 1340 BHS09 42 09.00 86 37.12 PONAR RAM sandy clay
L1998269.11 1348 BHS09 42 09.00 86 37.12 CORE-B RAM no good, top didn't shut
L1998269.12 1400 BHS09 42 09.00 86 37.12 CORE-B RAM excellent core, lost sub cores a,b and c did not appear acceptable
L1998269.13 1427 BHS09 42 09.00 86 37.12 CORE-B RAM attempted another CORE-B, this core was very bad
L1998269.14 1443 BHS09 42 09.00 86 37.12 CORE-S RAM sectioning core c from 2nd box core
L1998269.15 1518 BHS16 42 10.12 86 41.24 CORE-B RAM excellent core, took sub cores b, c
L1998269.16 1545 BHS16 42 10.12 86 41.24 CORE-S RAM sectioning core c, 55cm
L1998269.17 1637 BHS23 42 12.00 86 45.00 CORE-B RAM good core,getting rough out, though. Shallow core, appeared to have a hard pan clay bottom.
L1998269.18 1716 BHS23 42 12.00 86 45.00 CORE-S RAM sectioning core d, 30.5cm
L1998269.19 1756 BHS24 42 15.00 86 43.12 CORE-B RAM winds picking up, getting difficult to bring core in over sid of ship. Core appears ok, though, level surface, undisturbed upper layer
L1998269.20 1825 BHS24 42 15.00 86 43.12 CORE-S RAM sectioning core c, 51 cm
L1998269.21 1910 BHS17 42 13.12 86 39.00 PONAR RAM silty mud
L1998269.22 1915 BHS17 42 13.12 86 39.00 CORE-B RAM Excellent core, level surface, .5 cm oxidized surfase layer (FeOH, orangeish band) which is covered by thin, black sediment layers. Took subcores a, b,c, kept c and a
L1998269.23 1947 BHS17 42 13.12 86 39.00 CORE-S RAM sectioning core c, 56 cm
L1998269.24 2027 BHS10 42 11.24 86 35.24 PONAR RAM silty mud, some grit
L1998269.25 2032 BHS10 42 11.24 86 35.24 CORE-B RAM no good, only 20 cm deep, boxe core stopped by a sandy, hard clay area. Added weights, raised level of corer.
L1998269.26 2052 BHS10 42 11.24 86 35.24 CORE-B RAM A little better, maybe 24 cm deep with a layer of silty mud on top that only appears to be a few cm deep, maybe 4cm. Took subcores a and d, lost d, core a seperated. Lost core a on CORE-S stand. NO CORE for this station.
L1998269.27 2127 BHS03 42 10.12 86 31.12 PONAR RAM coarse sand, no good
L1998269.28 2241 BHS02 42 07.12 86 33.36 PONAR RAM fine sand
L1998269.29 2245 BHS02 42 07.12 86 33.36 PONAR RAM fine sand, zebra mussels
L1998269.30 2318 BHS01 42 04.13 86 35.24 PONAR RAM coarse sand, gravel no good
L1998270.01 1355 BHS04 42 13.12 86 29.24 PONAR RAM fine sand, zebra mussels, no good
L1998270.02 1425 BHS05 42 16.12 86 27.00 PONAR RAM fine sand, zebra mussels, no good
L1998270.03 1450 BHS06 42 18.36 86 24.36 PONAR RAM silty sand, zebra mussels, no good
L1998270.04 1520 BHS07 42 21.36 86 22.48 PONAR RAM fine sand, .25cm of flocculant material on top, zeb's, no good.
L1998270.05 1548 BHS14 42 23.24 86 26.24 PONAR RAM silty mud, some sand, good.
L1998270.06 1556 BHS14 42 23.24 86 26.24 CORE-B RAM no good, lid didn't shut, rope broke that pulls pin to close lid
L1998270.07 1613 BHS14 42 23.24 86 26.24 CORE-B RAM excellent core, 60 cm with a cm layer of pink clay overllaying it. Took sub cores a, c, d. Kept d
L1998270.08 1635 BHS14 42 23.24 86 26.24 CORE-S RAM sectioning core d, 46.5 cm
L1998270.09 1730 BHS13 42 20.24 86 28.48 WAT RAM surface sample for some guy.
L1998270.10 1735 BHS13 42 20.24 86 28.48 CORE-B RAM excellent core, 57 cm, took sub cores a, b, c. Kept C
L1998270.11 1800 BHS13 42 20.24 86 28.48 CORE-S RAM sectioning core c, 49.5 cm
L1998270.11b 1815 BHS13 42 20.24 86 28.48 CORE-S RAM sectioning core a for Davis to 20cm
L1998270.12 1854 BHS12 42 17.24 86 30.36 CORE-B RAM good core, took sub core a and c, lost b
L1998270.13 1916 BHS12 42 17.24 86 30.36 CORE-S RAM sectioning core c, 43.5 cm
L1998270.14 1956 BHS11 42 14.24 86 33.00 CORE-B RAM ok core but short, 43 cm, hit a hard clay/sand layer. Took sub cores a,b,c, kept a, nice nephloidy layer on surface.
L1998270.15 2035 BHS11 42 14.24 86 33.00 CORE-S RAM sectioning core a, 19 cm
L1998270.16 2122 BHS18 42 16.12 86 37.12 CORE-B RAM excellent core, took sub cores a,b, c, kept b and c
L1998270.17 2152 BHS18 42 16.12 86 37.12 CORE-S RAM sectioning core c, 49.5 cm
L1998270.18 2155 BHS18 42 16.12 86 37.12 CORE-S RAM sectioning core b for Davis to 20 cm.
L1998270.19 2243 BHS25 42 18.00 86 40.48 WAT RAM took surface water sample for Davis
L1998270.20 2245 BHS25 42 18.00 86 40.48 CORE-B RAM excellent core, took cores a,b,c
L1998271.01 0010 BHS25 42 18.00 86 40.48 CORE-S RAM sectioning core b, 58 cm.
L1998271.02 0015 BHS25 42 18.00 86 40.48 CORE-S RAM sectioning core a for davis to 20 cm
L1998271.03 1400 BHS19 42 19.12 86 34.48 CORE-B RAM excellent core, took sub core a, b, c, lost c.
L1998271.04 1431 BHS19 42 19.12 86 34.48 CORE-S RAM sectioning core b, 48.5 cm
L1998271.05 1434 BHS19 42 19.12 86 34.48 CORE-S RAM sectioning core a for Davis, took top 20 cm.
L1998271.06 1517 BHS20 42 22.12 86 33.00 CORE-B RAM excellent core, nice 1 cm oxic boundary layer on surface. Took sub cores a,b,c.
L1998271.07 1537 BHS20 42 22.12 86 33.00 CORE-S RAM sectioning core c, 50 cm
L1998271.08 1622 BHS21 42 25.12 86 30.36 CORE-B RAM took sub cores a,c,d.
L1998271.09 1644 BHS21 42 25.12 86 30.36 CORE-S RAM sectioning core a, 51.4 cm
L1998271.10 1734 BHS28 42 26.24 86 34.12 CORE-B RAM good core, took sub cores a,b,c
L1998271.11 1754 BHS28 42 26.24 86 34.12 CORE-S RAM sectioning core c, 56.3 cm
L1998271.12 1837 BHS27 42 23.24 86 36.36 CORE-B RAM excellent core, looks like there might be CH4 pockets near 10 cm. Took sub cores a,b,c.
L1998271.13 1854 BHS27 42 23.24 86 36.36 CORE-S RAM used core b, 54 cm
L1998271.14 1939 BHS26 42 21.00 86 39.00 CORE-B RAM good core, took sub cores a,b,c
L1998271.15 2007 BHS26 42 21.00 86 39.00 CORE-S RAM sectioning core c, 55.5 cm
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