This file contains a listing of the USGS 7.5 minute quadrangle codes for surveys
H, K and N.  All quadrangles listed are located within the state of Wisconsin.
Survey J, which is fill-in data from the files of NGDC, has no codes.

-------------------------------------------------------------------------------------

USGS 7.5' topographic quadrangle codes for survey H (Total of 1330 stations).

Aiken, O.W., Keller, G.R., and Hinze, W.J., 1983, Geological significance of
surface gravity measurements in the vicinity of the Illinois deep drill holes:
Journal of Geophysical Research, v. 88, no. B9, p. 7307-7314.

Note:  The "xx" refers to the two digit station number within each quadrangle.


 1xx - Albany
 2xx - Apple River
 4xx - Argyle
 5xx - Attica
 6xx - Barneveld
 7xx - Belleville
 8xx - Belmont
 9xx - Beloit
11xx - Blanchardville
12xx - Blue Mounds
13xx - Brodhead East
14xx - Brodhead West
15xx - Browntown
16xx - Calamine
17xx - Cooksville
18xx - Cottage Grove
19xx - Cross Plains
20xx - Cuba City
21xx - Daleyville
22xx - Darlington
23xx - Deerfield
25xx - Dodgeville
26xx - Edgerton
27xx - Evansville
28xx - Footville
29xx - Hollandale
30xx - Janesville West
31xx - Jonesdale
32xx - Juda
33xx - Linden
34xx - Madison East
35xx - Madison West
38xx - Middleton
39xx - Mifflin
40xx - Mineral Point
41xx - Monroe
42xx - Monroe NW
43xx - Montfort
44xx - Monticello
45xx - Mount Vernon
46xx - Highland East
47xx - Newark
48xx - New Diggings
49xx - New Glarus
50xx - Oregon
51xx - Orfordville
52xx - Platteville
53xx - Rewey
54xx - Rockdale
55xx - Rutland
56xx - Shullsburg
57xx - South Wayne
59xx - Pleasant Ridge/Clyde
60xx - Stoughton
62xx - Verona
63xx - Waldwick
65xx - Wiota
66xx - Yellowstone Lake


-------------------------------------------------------------------------------------

USGS 7.5' topographic quadrangle codes for survey K (Total of 433 stations).

Brukardt, S.A., 1983, Gravity survey of Waukesha County, Wisconsin: Milwaukee, WI,
University of Wisconsin-Milwaukee, unpublished Masters Thesis, 131 p.

Note:  The "xx" following the letter refers to the two digit station number within
each quadrangle.

Axx - Ixonia
Bxx - Mukwonago
Cxx - Waukesha
Dxx - Muskego
Exx - Eagle
Fxx - Waterford
Gxx - Genesee
Hxx - Hartland
Lxx - Palmyra
Mxx - Merton
Nxx - North Cape
Oxx - Oconomowoc East
Pxx - Little Prairie
Rxx - Menomonee Falls
Sxx - Stonebank
Txx - East Troy
Uxx - Sussex
Vxx - Hales Corners
Wxx - Oconomowoc West
Xxx - Wauwatosa

-------------------------------------------------------------------------------------

USGS 7.5' topographic quadrangle codes for survey N (Total of 117 stations).
Unpublished gravity data collected by the USGS September, 1996 in northwestern
Wisconsin.

BLL - Black Lake
BRW - Birchwood
BUK - Bucks Lake
CLV - Cloverton
DRL - Dairyland
EDG - Edgewater
EMS - Empire Swamp
MIK - Mikana
MOO - Moose Junction
NOB - Nobleton
NOR - Norton
RLN - Rice Lake North
SCV - Scovils Lake
WEY - Weyerhauser
WHE - Wheeler