# Station data

COM_ON_REF:
Also published in Overton, et al., 1984; and Chew & Swilley, 1987

SPECFC_LOC:
south coast, 400 yards north of Duncan Canal, Jefferson Parish

LOC_CMMNTS:
coords given in report wrong; lat/long used here derived from station description using process described in SSCONVERT.DOC


SPECFC_LOC:
south coast, 400 yards north-northwest of IHNC, Orleans Parish


SPECFC_LOC:
approximately 2.75 miles north-northwest of Jahncke Canal, Orleans Parish


SPECFC_LOC:
approximately 4.2 miles north of IHNC, Orleans parish


SPECFC_LOC:
approximately 1.5 miles north-northwest of London Ave. Canal, Orleans Parish


SPECFC_LOC:
approximately 1.8 miles north of 17th St. Canal, Jefferson Parish


SPECFC_LOC:
approximately 4.5 miles north northeast of Bonnabel Canal, Jefferson Parish


SPECFC_LOC:
approximately 2.9 miles north-northeast of Elmwood Canal, Jefferson Parish


SPECFC_LOC:
approximately 3.9 miles north-northwest of Duncan Canal, Jefferson Parish


SPECFC_LOC:
approximately 4.1 miles north of Parish Line Canal, Jefferson Parish


SPECFC_LOC:
south coast, 400 yards north of Parish Line Canal, Jefferson Parish


SPECFC_LOC:
south coast, 400 yards north of Suburban Canal, Jefferson Parish


SPECFC_LOC:
south coast, 400 yards north-northwest of 17th St. Canal, Jefferson Parish


SPECFC_LOC:
south coast, 400 yards north of Bayou St. John, Orleans Parish


SPECFC_LOC:
south coast, 400 yards north of London Ave. Canal, Orleans Parish


SPECFC_LOC:
approximately 1 mile north-northeast of 17th Street Canal


SPECFC_LOC:
approximately 4 miles south of Goose Point


SPECFC_LOC:
approximately 1 mile south-southwest of Bayou Bonfouca


SPECFC_LOC:
approximately 1 mile east of Pass Manchac


SPECFC_LOC:
approximately 1 mile south of Tchefuncte River


AGNC1_SPON:
Louisiana Wildlife and Fisheries Commission

LOC_CMMNTS:
Coordinates derived from sketch map: probable error of +/- 1minute; (average of 26 samples)


LOC_CMMNTS:
Coordinates derived from sketch map: probable error of +/- 1minute; (average of 24 samples)


LOC_CMMNTS:
Coordinates derived from sketch map: probable error of +/- 1minute; (average of 25 samples)


LOC_CMMNTS:
Coordinates derived from sketch map: probable error of +/- 1minute; (average of 28 samples)


LOC_CMMNTS:
Coordinates derived from sketch map: probable error of +/- 1minute; (average of 23 samples)


LOC_CMMNTS:
'sample sites only approx'; Coords. from sketch map; coords given as centroids of squares on map, except stations along edge of lakes: in those cases coords are approx. centroid of irregular shape formed by square and shoreline

DPTH_N_COR:
"The upper 3 inches of the core samples were analyzed…"

GEN_CMMNTS:
"The coring tube was pushed approximately 12 inches into the water bottom and retrieved. The tube containing the sample was disconnected from the corer, capped on both ends, labeled, and placed upright in racks."


LOC_CMMNTS:
station locations given in LORAN C coordinates and on sketch map.  conversion from LORAN C to lat/long gave erroneous locations, so lat/long estimated from sketch map

CMNTS_OTHR:
6 water microbiology parameters, 5 sediment microbiological parameters, benthic invertebrate analysis, 60 species of fish collected


SPECFC_LOC:
Shell Oil Co. Refinery LA0003522, WP0512 - Outfall 002 (point source)


SPECFC_LOC:
Shell Oil Co. Manufacturing LA0050962 - Outfall 001 (point source)


SPECFC_LOC:
approximately fifty yards downstream of the Shell Refinery (mixing zone)


SPECFC_LOC:
approximately 0.25 miles downstream of the Shell Refinery (impact zone)


SPECFC_LOC:
approximately one mile downstream of the Shell Refinery (impact zone)


SPECFC_LOC:
approximately 0.25 miles upstream of the confluence with Bayou La Branche (transition zone)


SPECFC_LOC:
approximately 0.50 miles upstream of the confluence with Bayou Trepagnier (reference station)


SPECFC_LOC:
at the Illinois Central Railroad crossing (recovery zone)


SPECFC_LOC:
Shell Oil Co. Refinery LA0003522, WP0512 - Outfall 004 (point source)


SPECFC_LOC:
approximately 0.5 miles downstream (north) of I-10  (reference station)


SPECFC_LOC:
approximately 0.25 miles northwest of the mouth of Bayou La Branche (reference station)


SPECFC_LOC:
approximately 0.25 miles above the outlet from Bayou Trepagnier (reference station)


LOC_CMMNTS:
relative coordinates - see file "GFCONVERT.DOC" for description of conversion process


LOC_CMMNTS:
the coordinates in fields 8-10 & 13-15 were e-mailed to AGM by G.Flowers on 4-28-97.  the coordinates in fields 7 & 12 were calculated by AGM from a faxed copy of figure 1 of Sarkar's thesis (see file"SSCONVERT.DOC" for full details)


LOC_CMMNTS:
calculated by AGM from a faxed copy of figure 1 of Sarkar's thesis (see file"SSCONVERT.DOC" for full details)


NAV_MODE:
the LORAN C coordinates in fields 8 & 13 were e-mailed to AGM by G.Flowers on 4-28-97.  the coordinates in fields 7 & 12 were calculated by AGM from a faxed copy of figure 1 of Sarkar's thesis (see file"SSCONVERT.DOC" for full details)

LOC_CMMNTS:
the LORAN coordinates in field 17 were e-mailed to AGM by G.Flowers on 4-28-97.  the coordinates in fields 7 & 12 were calculated by AGM from a faxed copy of figure 1 of Sarkar's thesis (see file"SSCONVERT.DOC" for full details)


ORIG_LOC:
calculated by AGM from a faxed copy of figure 1 of Sarkar's thesis (see file"SSCONVERT.DOC" for full details)


LOC_CMMNTS:
no specific information available on location


LOC_CMMNTS:
"...the entraces of....", estimated from NOAA chart


LOC_CMMNTS:
"...at the mouth of...", estimated from NOAA chart


LOC_CMMNTS:
"...at the outfalls of ...", estimated from NOAA chart


LOC_CMMNTS:
"...at the outfalls of ...", estimated from NOAA chart; canal assumed to be Metarie Outfall Canal


LOC_CMMNTS:
"0.00 mi from shore"; on sketch map; ["mi" must be nautical mi to agree with sketch map]; estimated from NOAA chart


LOC_CMMNTS:
"0.25 mi. from shore"; on sketch map; ["mi" must be nautical mi to agree with sketch map]; estimated from NOAA chart


LOC_CMMNTS:
"0.50 mi. from shore"; on sketch map; ["mi" must be nautical mi to agree with sketch map]; estimated from NOAA chart


LOC_CMMNTS:
"0.75 mi. from shore"; on sketch map; ["mi" must be nautical mi to agree with sketch map]; estimated from NOAA chart


LOC_CMMNTS:
"1.00 mi. from shore"; on sketch map; ["mi" must be nautical mi to agree with sketch map]; estimated from NOAA chart


LOC_CMMNTS:
"1.25 mi. from shore"; on sketch map; ["mi" must be nautical mi to agree with sketch map]; estimated from NOAA chart


LOC_CMMNTS:
"4.75 mi. from shore"; on sketch map; ["mi" must be nautical mi to agree with sketch map]; estimated from NOAA chart


LOC_CMMNTS:
"7.00 mi. from shore"; on sketch map; ["mi" must be nautical mi to agree with sketch map]; estimated from NOAA chart


LOC_CMMNTS:
"8.00 mi. from shore"; on sketch map; ["mi" must be nautical mi to agree with sketch map]; estimated from NOAA chart


LOC_CMMNTS:
"9.00 mi. from shore"; on sketch map; ["mi" must be nautical mi to agree with sketch map]; estimated from NOAA chart


LOC_CMMNTS:
sketch map: locations transferred to 7.5' topo and then calculated by program RULE2LL (see Sarkar, 1995 & SSCONVERT.DOC)

DESCRIPTN:
0 - 14 inches: Brown-gray, silt and clay, recently dead Rangia. Sieve: top-silt, some organic particales, mica flakes, many aglumated forams (Ammobaculites) sponge spicules.


DESCRIPTN:
0 - 15 inches: Brown-gray, silt and clay, breaks apart along laminations of organic material, Rangia shell. Sieve: mostly organics, some silt, mica flakes, spicules, no forams found.


DESCRIPTN:
0 - 14 inches: Brown-gray, silt and clay, breaks apart along laminations of organic material, Rangia shell. Sieve: mostly organics, some silt, mica flakes, spicules, no forams found.


DESCRIPTN:
0 - 9 inches: Uniform dark gray, churned, fresh twig embedded. Chert gravel found at same location. Sieve: organic material, silt, some sand, spicules, mica, spore.


DESCRIPTN:
0 - 7 inches: Gray-brown silt. Sieve: floculated fine silt, some sand, very little organic material.


DESCRIPTN:
7 - 18 inches: Recently dead Rangia, top part pure clay, lower part with laminations and silt layers. Sieve: fine silt, organics, spicules.


DESCRIPTN:
0 - 12 inches: Laminated silt layers at top, then Rangia shell on top of dark gray clay.


DESCRIPTN:
0 - 5.5 inches: Sandy. 5.5 - 8 inches: organic material layer over clay.


DESCRIPTN:
0 - 3 inches: Brown-gray silt and sand. Sieve: sand, organics, some floculated silt, forams, mica.


DESCRIPTN:
3 - 15 inches: Rangia shells at top, then gray-brown with laminations and organic layers. Sieve: sand, heavy minerals are associated with laminations.


DESCRIPTN:
0 - 14 inches: Brown, silty with organic matter. 14 - 20 inches: Laminated, silty, with shell fragments interbedded.


DESCRIPTN:
0 - 12 inches: Many shells, clay and organic material at the top, laminated at the bottom.


DESCRIPTN:
0 - 16 inches: Brown-gray silt, some laminations, shell fragment. Sieve: sand, organic material, Discorbis, Ammobaculites, spicules.


DESCRIPTN:
0 - 12 inches: Brown-gray silt, some laminations, shell fragment. Sieve: fine sand, some organics, mica, spicules, possible Ammobaculites on top and bottom.


DESCRIPTN:
0 - 7 inches: Brown-gray layered, silty, lower inch has shell fragments. 7 - 17 inches: dark gray clay.


DESCRIPTN:
0 - 4 inches: Black, sticky mud with lumps of silt and sand. 4 - 10? Inches: laminated silt with fragments on top.


DESCRIPTN:
0 - 12 inches: Black mud with lumps of silt and sand. 12 - 21 inches: Laminated silt with fragments on top.


DESCRIPTN:
0 - 7 inches: Laminated, friable, brown-gray silt. Sieve: mostly fine sand, a few organics, many Ammobaculites and Discorbis, a few spicules.


DESCRIPTN:
7 - 16 inches: Rangia shells at top of almost pure gray clay. Sieve: organic material, Ammobaculites and Discorbis, spicules, some sand and mica.


DESCRIPTN:
0 - 15 inches: Uniform brown-gray, friable silt, Rangia shells near top. Sieve: floculated silt, organics, spicules, mica, some sand, no obvious forams.


DESCRIPTN:
0 - 4 inches: Cohesive brown-gray clay with Rangia shells at top. Sieve: floculated silt, sand, organics, Ammobaculites and Discorbis spicules.


DESCRIPTN:
0 - 16 inches: Cohesive brown-gray clay at top, less cohesive near bottom, no laminations. Sieve (at top): floculated silt, sand, some organic material, forams, spicules, mica. Sieve (at bottom): organic material, silt, spicules.


DESCRIPTN:
0 - 2 inches: Churned brown-gray sediment. 2 - 6 inches: Rangia shells on dark gray cohesive clay. Sieve: some silt and sand, very few organics, some spicules, Ammobaculites, pyrite, mica. 6 - 15 inches: Brittle lighter gray clay.


DESCRIPTN:
0 - 3 inches: Friable gray sediment. Sieve: fine sand, forams, mica, spicules, not much organic material.


DESCRIPTN:
3 - 20 inches: Rangia shells, then brown to dark cohesive clay.


DESCRIPTN:
0 - 3.5 inches: Sand. Sieve: clean sand, many forams. 3.5 - 6.5 inches: Churned looking silt, gray-brown, laminated, Sieve: floculated silt, forams, few sand grains, a spicule, no organics. 6.5 - 14 inches: Brown to d. brown clay with some laminations.


DESCRIPTN:
0 - 3 inches: Noncohesive sand and silt, live Rangia at top. Sieve: fins sand, many Ammobaculites. 3 - 16 inches: Brown clay with laminations of silt and sand. Sieve: floculated silt, few sand grains.


DESCRIPTN:
0 - 6 inches: Noncohesive silt and sand. Sieve: fine sand, many Ammobaculites. 6 - 20 in.: Brown cohesive clay w/ piece of charcoal embedded 6" down. Laminations and thin organic layers. Sieve (clay): floculated silt, organic material, spicules, forams.


DESCRIPTN:
0 - 10 inches: Noncohesive brown-gray silt. Sieve (near top): fine sand, chunks of black irganic material, spicules, forams. Sieve (near bottom): same, more organics. (Below this was probably clay that slipped out of the core barrel).


DESCRIPTN:
0 - 12 inches: Noncohesive brown-gray silt. Sieve (near top): fine sand, chunks of black organic material. Sieve (near middle): fine sand, organic material in chunks, forams, spicules.


DESCRIPTN:
0 - 12 inches: Gray-brown, noncohesive silt with dark laminations and thin organic layers. Sieve (near top): silt, spicules, forams, some organic material. Sieve (near bottom): fine sand, forams.


DESCRIPTN:
0 - 6 inches: Gray-brown laminated, cohesive, churned silt and clay. Sieve: organic material, floculated silt, spicules. 6 - 14 inches: Gray laminated, noncohesive sand and silt. Sieve: fine clean sand, many Ammobaculites, spicules. 14-23": d. brown clay


DESCRIPTN:
0 - 7 inches: Gray-brown, laminated, cohesive, churned silt and clay. 7 - 11 inches: Rangia, gray, noncohesive silt and sand. 11 - 19 inches: Dark brown clay with some layers of gray silt. Sieve: floculated silt, sand, some organic material, spicules.


DESCRIPTN:
0 - 6 inches: Gray-brown, laminated, cohesive, churned silt and clay. 6 - 11 inches: Rangia, gray, noncohesive silt and sand. Sieve: organic material, floculated silt, sand, spicules. 11 - 19 inches: Dark brown clay with some layers of gray silt.


DESCRIPTN:
0 - 8 inches: Gray-brown laminated silt, sand and clay. Sieve: floculated silt, organic material, spicules, Discorbis.


DESCRIPTN:
8 - 24 inches: Rangia shell on top, dark brown clay with some laminations. Sieve: organic material, spicules.


DESCRIPTN:
0 - 7 inches: Brown-gray, cohesive silt and sand. Sieve: floculated silt, spicules.


DESCRIPTN:
7 - 17 inches: Noncohesive gray silt and sand. Sieve: fine sand, silt, fairly clean, possible Ammobaculites.


DESCRIPTN:
0 - 6 inches: Grayish silt with Rangia. Sieve: floculated silt, organic material, spicules, forams. 6 - 18 inches: Dark brown silt and clay. Sieve:  floculated silt, organic material, spicules, forams.


DESCRIPTN:
0 - 12 inches: Drak brown cohesive clay. Sieve: organic material, some fine sand. Discorbis, spicules.


DESCRIPTN:
0 - 8 inches: Gray noncohesive laminated silt.


DESCRIPTN:
0 - 8 inches: Gray noncohesive churned silt.


DESCRIPTN:
8 - 11 inches: Cohesive dark brown clay.


DESCRIPTN:
0 - 8 inches: Rangia shell at top, laminated gray silt.


COMPS_SCHM:
"Three samples were taken at each location and homogenized by mixing using plastic utensils."

GEN_CMMNTS:
CaCO3 values suspect - same dozen #s keep showing up


GEN_CMMNTS:
CaCO3 values suspect - same dozen #s keep showing up; Grain sizes are in error (each one is 41.52) see fields 658 - 660 in "Grain Size Data" table


GEN_CMMNTS:
CaCO3 values suspect - same dozen #s keep showing up; See comment in field 89 (COMMENT1) in "Inorganic" table


GEN_CMMNTS:
CaCO3 values suspect - same dozen #s keep showing up; Grain sizes are in error (total over 100%)


GEN_CMMNTS:
(see Vibracores section of J. Flocks, this publication, for more methods info; http://coast-enviro.er.usgs.gov/PontGeochem/html/JF_vbcor.htm)

DESCRIPTN:
Very soft dark grayish brown liquid clay mud, with high degree of bioturbation; silty fine sand filled burrows; massive unit; shall fragments throughout unit (Rangia .5-3 cm)


GEN_CMMNTS:
Possible admixture of dredged material in upper horizons because of softness and massive texture; boundary to Pleistocen 449 cm.

DESCRIPTN:
"B2" Soft medium-gray clay with sil and fine sand-filled burrows; massive bedding with occasional silt lenses and scattered Rangia. In situ shells > 1 cm; 2 cm sand-filled burrows (Unit B).


GEN_CMMNTS:
Probable lateral; (see Vibracores section of J. Flocks, this publication, for more methods info; http://coast-enviro.er.usgs.gov/PontGeochem/html/JF_vbcor.htm)

DESCRIPTN:
V. soft dark gray silty clay-mud, bioturbated; liq.


GEN_CMMNTS:
Lateral from dredging; (see Vibracores section of J. Flocks, this publication, for more methods info; http://coast-enviro.er.usgs.gov/PontGeochem/html/JF_vbcor.htm)

DESCRIPTN:
Clay, silty, soft dark gray mud, liquified unit, burrows throughout; some <1 cm Rangia fragments; rafted organics


GEN_CMMNTS:
Possible lateral?; (see Vibracores section of J. Flocks, this publication, for more methods info; http://coast-enviro.er.usgs.gov/PontGeochem/html/JF_vbcor.htm)

DESCRIPTN:
Shell, sandy, massive shell fragments & subangular, quartz sand; with poorly sorted mud, light gray; oyster frammgnerts and sharp contact


DESCRIPTN:
Unit B.Shelly m. grained sand, subangular poorly sortred, with Rangia shells; large sand-filled burrow. Faint parallel laminations


DESCRIPTN:
Unit C. Stiff olive gray silty clay with sand and silt-filled burrows. Oxidized organic matter increase with depth along with stiffness and decreased burrowing (Pleistocene).


GEN_CMMNTS:
Possible dredge; (see Vibracores section of J. Flocks, this publication, for more methods info; http://coast-enviro.er.usgs.gov/PontGeochem/html/JF_vbcor.htm)

DESCRIPTN:
Clay, very soft, dark grayish; highly bioturbated; silty sand fillings of burrows; massive & deformed


DESCRIPTN:
Clay7, soft gray with silty sand filled burrows; massive with in situ Rangia shells at 102 cm


GEN_CMMNTS:
Probably lateral from dredging; (see Vibracores section of J. Flocks, this publication, for more methods info; http://coast-enviro.er.usgs.gov/PontGeochem/html/JF_vbcor.htm)

DESCRIPTN:
Very soft silty  clay with sand-filled burrows, liquefied unit (mud); sharp basal contact below


DESCRIPTN:
[Unit "B"]Fine-med grained sand, subangular, poorly sorted qtz; Rangia shell 1-3 cm; faint horizonontal laminations at top of unit but defomred at base by burrowing and Rangia; sharp basal contact;


DESCRIPTN:
Soft gray clay with silty sand filled burrows; interbedded laight and dark clay bands, laminations; sand-filled burrowsw near top of unit decrease with depth; siderite noduloe at 165 cm.


GEN_CMMNTS:
Dredged; (see Vibracores section of J. Flocks, this publication, for more methods info; http://coast-enviro.er.usgs.gov/PontGeochem/html/JF_vbcor.htm)

DESCRIPTN:
Very  soft liquefied dark grayish brown clay mud; massive bedding; silty, sand-filled burrowes; sharp basal contact, some bioturbation; Rangia near base of unit


DESCRIPTN:
Soft silty, fine sand with interbedded clay and clay clasts; high degree of deformation; shell sand lag 41 cm sharp basal contact; sands are sub-angular, poorly sorted qtz and shell frags. Faint laminations


DESCRIPTN:
Soft medium gray clay with interbedded silty with occasional fine sand ; Light and dark clay bands; horizontal laminations


DESCRIPTN:
Very soft liquified dark graish brown clay mud; massive bedding with signs of horiz. Laminations at 45 cm burrows with Rangia at base oif layer (1-3 cm); rafted organics throughout5; sharp basal contact


DESCRIPTN:
Unit B: soft silty clay with silty sand lenese and sand beds (1-5 cm); gray in olor with dark rafted organics at top of uinit; grain size increases with depth; subangular, poorly sorted .


GEN_CMMNTS:
lateral; (see Vibracores section of J. Flocks, this publication, for more methods info; http://coast-enviro.er.usgs.gov/PontGeochem/html/JF_vbcor.htm)

DESCRIPTN:
Mud, clayey, v. soft liquified dark grayish brown; massive medding and sharp bassal contact; sea shell frags at base, burrowing organisms


DESCRIPTN:
Sand, silty, gray; with soft silty clay, gray, rafted organics, clay clasts and filled burrows


DESCRIPTN:
Clay, soft silty, gray, with silty sand, as above


DESCRIPTN:
Clay, soft, gray,  continues to total depth of 5.46 m. with occ shell, mottled organic layers;


DESCRIPTN:
Very soft, liquid grayish brown clay-mud; massive bedding; small shell fragments; burrowing near sharp basal contact; rafted organics


DESCRIPTN:
Soft silty clay, med. Gray, very deformed by burrowing and dewatering, rafted organics; clay clast near top of massive unit; shaprly inclined basal contact.


GEN_CMMNTS:
Probable dredge; (see Vibracores section of J. Flocks, this publication, for more methods info; http://coast-enviro.er.usgs.gov/PontGeochem/html/JF_vbcor.htm)

DESCRIPTN:
V.silty, liquid clay, dark grayish brn, with scattered rangia; some silty sand-filled burrows toward base of unit;


DESCRIPTN:
V. soft dark grayish-brown clay-mud, massive bedding, with sc. Shells & fragments; burrowing present; sharp basal contacts; increasing gfrain size with depth.


GEN_CMMNTS:
Lateral; (see Vibracores section of J. Flocks, this publication, for more methods info; http://coast-enviro.er.usgs.gov/PontGeochem/html/JF_vbcor.htm)

DESCRIPTN:
V. soft dark grayish-brown clay-mud, massive bedding, with sc. Shells & fragments; burrowing present; sharp basal contacts; increasing gfrain size with depth; unit A.


DESCRIPTN:
Fine subangular sorted quartz sand; Rangia shells at top with rafted organics; silty sand-filled burrows


DESCRIPTN:
Fine subangular sorted quartz sand; Rangia shells layer at 40-51 cm ; burrowing from .72-1.52


DESCRIPTN:
Fine subangular sorted quartz sand; With shell lag at top


DESCRIPTN:
Very fine silty sand with laminated lag of (>2 cm) Rangia shell at top. Decrease in shell content with depth. Sharpo basal contact from silty fine sand to organic-rich clay; generally massive unit with occasional rafted organics.


DESCRIPTN:
Medium-soft brown-gfray clay; generally horizontal laminations with fine silt. Deformation by dewatering and burrowing; organic-rich layer at 70-104 cm. Very small rafted organics throughout, but no sign of shell except single small Rangia at 134 cm; sign


DESCRIPTN:
Clayey mud, highly liquid, massive becoming stiffer with depth; dredged


GEN_CMMNTS:
Lateral dredging; (see Vibracores section of J. Flocks, this publication, for more methods info; http://coast-enviro.er.usgs.gov/PontGeochem/html/JF_vbcor.htm)

DESCRIPTN:
Clay, very soft dark brown, with scattered sand & shell fragments, generally massive


GEN_CMMNTS:
may be direct dredged; (see Vibracores section of J. Flocks, this publication, for more methods info; http://coast-enviro.er.usgs.gov/PontGeochem/html/JF_vbcor.htm)


DESCRIPTN:
Clay with with interbedded shelly fine sand beds, rafted organic fragments, becoming tiffer with depth; burrowing increases;


DESCRIPTN:
Unit "C" ; v. stiff olive gray clay with oxidized spots; heavily bioturbat with rooting near contacts


DESCRIPTN:
Very soft mud, dark grayish brown with silty fine sand-filled burrow3s; Small Rangia shells (2 cm) throughout unit. Shell lag with fine  at 40-54 cm; massive unit with occ. Sand waves


GEN_CMMNTS:
Unit A, dredged; (see Vibracores section of J. Flocks, this publication, for more methods info; http://coast-enviro.er.usgs.gov/PontGeochem/html/JF_vbcor.htm)

DESCRIPTN:
Very soft silty mud with occasional fine sandy lenses, light brown, laminated by small sand lenses <1 cm especially around 75 cm; very small shel frags only found in sand layers. Sand-filleed burrow at 16 and 30 cm.; occasional burrowing; transitional bas


DESCRIPTN:
Soft light brown gray clay with Rangia shell fragments and lags; becomes stilty and sandy with depth; two sh ell lags at 119,  and 134 cm; heavy burrowing; no sshell found 217-455 cm;


LOC_CMMNTS:
estimated lat/long/sand% from Dunbar's map -- LH and FM 5/9/98


ORIG_DB_NM:
EMAP-Estuaries Province Level Database, Louisianian Province 1991-1994

COM_ON_REF:
EMAP data in this database consists of samples with latitude between 29 and 30.5 N and longitude between 88.5 and 93 W extracted from LA province data.

COMPS_SCHM:
sample is a homogenate composed of the surficial 2 cm from several grabs (see methods field in grain size table for additional comments)

CMNTS_OTHR:
Toxicity Test Data, Water Quality Vertical Profile, Benthic Data, Fish/Invertebrate Data


COM_ON_REF:
EMAP data in this database was extracted from EPA'


GEN_CMMNTS:
REP-91,  No sediment sample was taken in the field at this station (QA_CODE = CH-N)


SMPLNG_DEV:
0.1 m^2 box corer, subsampled using a 4.25 inch polycarbonate core liner

GEN_CMMNTS:
(see Box and Piston Cores section of J. Flocks, this publication, for more methods info; http://coast-enviro.er.usgs.gov/PontGeochem/html/JF_box.htm)


# General Organics

PHC_Q:
ppm wet weight; title of table is "CONCENTRATIONS OF TOTAL HYDROCARBONS IN SEDIMENT SAMPLES"

PCB_Q:
originally reported as 4 ng/g wet weight


PCB_Q:
originally reported as 7 ng/g wet weight


PCB_Q:
originally reported as 5 ng/g wet weight


PCB_Q:
originally reported as 120 ng/g wet weight


PCB_Q:
originally reported as 1 ng/g wet weight


PCB_Q:
originally reported as 0.1 ng/g wet weight


PCB_Q:
originally reported as 0.6 ng/g wet weight


PCB_Q:
originally reported as 0.05 ng/g wet weight


PCB_Q:
originally reported as 0.4 ng/g wet weight


PCB_Q:
originally reported as 1.3 ng/g wet weight


PCB_Q:
originally reported as 2.9 ng/g wet weight


# Inorganic

AG_Q:
leach; DV >10 but occurs in proximity to New Orleans canals where other elevated contaminants have been observed


AG_Q:
Leach; DV >10 but occurs in proximity to New Orleans canals where other elevated contaminants have been observed


AG_Q:
W; Leach; DV .04, Ag unreasonably low for high Zn value


ANAL_TECH:
Organic carbon measured by Leco automatic analyser with carbonate pre-leach


NO3_Q:
<DL; originally reported as <0.15 mg/kg as N


NO3_Q:
<DL; originally reported as <0.17 mg/kg as N


NO3_Q:
<DL; originally reported as <0.14 mg/kg as N


NO3_Q:
<DL; originally reported as <0.16 mg/kg as N


NO3_Q:
<DL; originally reported as <0.18 mg/kg as N


NO3_Q:
<DL; originally reported as <0.23 mg/kg as N


NO3_Q:
<DL; originally reported as <0.22 mg/kg as N


AG_Q:
LW, W; DV >> 10; (low zinc) no apparent source of anomalous Ag


COMMENT1:
metals numbers are identical with CO9 - data entry error?


COMMENT1:
metals numbers are identical with MR9 - data entry error?


TI_Q:
Leach; orig units %; mean (n=2); near DL


TI_Q:
Leach; orig units %; orig units %; near DL


# Specific Org-A

A1016_Q:
<DL; orig reported as <500 ug/kg; 1016 & 1242 reported separately, but same values and DL's

SIMAZINE_Q:
<DL; orig reported as <1000 ug/kg dry solids


# Specific Org-B

BENZNE_Q:
wet weight; results are of composite samples


BENZNE_Q:
ND; wet weight; results are of composite samples


# Grain Size Data

COMMENTS_O:
Data derived from fig.21 of referenced source.  Figure consists of line graphs for each station showing % by weight of 12 classes of phi units.  Figure was gridded and values were estimated for each class at each station.

COMMENTS_2:
Values for this reference do not always total 100%.  Average total for all sites is 103%; range is 90-116%.  Classes: sand (-1)-0 to 4-5; silt: 4-5 to 8-9; clay: 8-9 to >10.


COMMENTS_O:
upper 3 inches of core samples analyzed using: Folk, Robert L., 1968. Petrology of sedimentary rocks. University of Tex. 182 p.


COMMENTS_O:
sand, silt, and clay all the same (41.52)


METHOD_CO:
SAND_PCT was interpreted (estimated) by F. Manheim from lithologic descriptions written by P. Connor


METHOD_FI:
2 types of samples analyzed: A subsample of the composited homogenate (top 2-3 cm of sediment taken from collective grabs) was analyzed for grain distribution. Also small core samples taken from each of 3 grabs were used for determination of % silt/clay.

METHOD_CO:
SAND_PCT = 100 - FINES_SIL.  The percent sand calculation is: %sand = sand wt/(sand wt + silt-clay wt) * 100


METHOD_FI:
small core samples taken from each of 3 grabs were used for determination of % silt/clay. (Grain size distribution dropped as parameter).


METHOD_FI:
A subsample of the composited homogenate (top 2-3 cm of sediment taken from collective grabs) was used to determine % silt/clay. (Grain size distribution not analyzed. No small cores collected).


