ANN. Plymouth. Provincetown. Gloucester ... Sanctuary region offshore of Boston, Massachusetts: U.S. Geological Survey Scientific. Investigations Map 3341 ...
U.S. Department of the Interior U.S. Geological Survey
Scientific Investigations Map 3341
Prepared in cooperation with the
National Oceanic and Atmospheric Administration 70°12'
70°13'
70°11'
70°10'
70°08'
70°09'
Map G 70°06'
70°07'
70°04'
70°05'
70°02'
70°03'
AGEN STELLW
42°19'
42°19'
BANK NATIO NAL M ARINE SANCT UARY
42°18'
42°18'
S T E
42°17'
42°17'
N I N
EAST NINETY BANK
A
Y E T
W L L
NORTH NINETY BANK
G E
42°16'
42°16'
M
N
E R E T
B A N K
42°15'
42°15'
N B A K S
42°14'
42°14'
MIDDLE NINETY BANK
42°13'
42°13'
SOUTH NINETY BANK
70°13'
70°12'
70°11'
70°10'
70°08'
70°09'
Mercator projection
70°06'
70°07'
70°05'
1 1
This map is not intended for navigational purposes.
.5
0 .5
1
2
0
3
4 KILOMETERS
1
2 NAUTICAL MILES
CONTOUR INTERVAL 5 METERS ADDITIONAL 1-METER CONTOURS INCLUDED TO SHOW BOTTOM ROUGHNESS DATUM MEAN LOWER LOW WATER
rr Me
ED GE
F JE
16
17
18
80
14
100
11
SS
HU
TT
80
4
5
Boulder ridges ≥1 m in height—Equivalent to substrate C of Map D
6
HANNEL OINT C CE P RA
3
80
Provincetown 42°00'N
Plymouth
Boulder ridges 20 to 50—Equivalent to substrate G2 of Map D
B GEN
SE
BOSTON
8
S
A LLW TE
AC
7
ST E BALLW SI AG N EN
12
200
80
MA
10
1
41°45'N
Mud content >10 to 20—Equivalent to substrate D2 of Map D
80
42°30'N
42°15'N
15
ANK
100
IES B
13
Mud content >5 to 10—Equivalent to substrates F and G1 of Map D
GULF OF MAINE
80
CAPE ANN
Mud content ≤1—Equivalent to substrates A1, A2, and B of Map D Mud content >1 to 5—Equivalent to substrates D1 and E of Map D
L
TILL
Gloucester
S EY FR
0
100
DESCRIPTION OF MAP UNITS
[Mud content is given as mean weight percent. See table 5 for textural characteristics of individual substrates. See Mapping Methods for explanation of topographic contour intervals]
70°00'W 10
ack River
70°15'W
40
42°45'N
70°30'W 80
im
70°45'W
70°02'
70°03'
SCALE 1:25 000 ONE CENTIMETER ON THE MAP REPRESENTS 250 METERS ON THE SEA FLOOR
Geodetic Reference System 1980; North American Datum of 1983 Longitude of central meridian 70°19' W; latitude of true scale 41°39' N False easting 0 m; false northing 0 m
71°00'W
70°04'
Map G.—Distribution of Substrate Mud Content Seabed Maps Showing Topography, Ruggedness, Backscatter Intensity, Sediment Mobility, and the Distribution of Geologic Substrates in Quadrangle 6 of the Stellwagen Bank National Marine Sanctuary Region Offshore of Boston, Massachusetts
20 km CAPE COD
Location Map.—Shows quadrangle 6 (highlighted in yellow). Stellwagen Bank National Marine Sanctuary boundary is shown as a dashed line. Bathymetric contours are labeled in meters.
By
Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government Digital files available at http://pubs.usgs.gov/sim/3341/ Suggested citation: Valentine, P.C., and Gallea, L.B., 2015, Distribution of substrate mud content, map G of Seabed maps showing topography, ruggedness, backscatter intensity, sediment mobility, and the distribution of geologic substrates in quadrangle 6 of the Stellwagen Bank National Marine Sanctuary region offshore of Boston, Massachusetts: U.S. Geological Survey Scientific Investigations Map 3341, scale 1:25,000, http://dx.doi.org/10.3133/sim3341.
