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T. 105 N.
T. 105 N.
T. 106 N.
T. 106 N.
T. 107 N.
T. 107 N.
T. 108 N.
T. 108 N.
T. 109 N.
T. 109 N.
R. 25 W.
R. 25 W.
R. 26 W.
R. 26 W.
R. 27 W.
R. 27 W.
R. 28 W.
R. 28 W.
R. 29 W.
R. 29 W.
DANVILLEMAPLETONSTERLINGSHELBY
PLEASANT
MOUND
CERESCOVERNON CENTER LYRA BEAUFORD MEDO
MCPHERSONDECORIARAPIDANGARDEN CITYLINCOLN
BUTTERNUT VALLEY JUDSON SOUTH BEND MANKATO LERAY
JAMESTOWNLIME
CAMBRIA
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94° W.
94° W.
44° N.
44° N.
94°15' W.
94°15' W.
44°15' N.
FARIBAULT COUNTYFARIBAULT COUNTY
MARTIN COUNTY
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Minnesota
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GEOLOGIC ATLAS OF BLUE EARTH COUNTY, MINNESOTA
This map was compiled and generated in a geographic information system (GIS). Digital data products, including chemistry and geophysi-cal data, are available from the DNR Ecological and Water Resources Division at http://www.mndnr.gov/waters.This map was prepared from publicly available information only. Every reasonable effort has been made to ensure the accuracy of the factual data on which this map interpretation is based. However, the Depart-ment of Natural Resources does not warrant the accuracy, completeness, or any implied uses of these data. Users may wish to verify critical information; sources include both the references in the report and information on file in the offices of the Minnesota Geological Survey and the Minnesota Department of Natural Resources. Every effort has been made to ensure the interpretation shown conforms to sound geologic and cartographic principles. This map should not be used to establish legal title, boundaries, or locations of improvements.Base modified from Minnesota Geological Survey, Blue Earth County Geologic Atlas, Part A, 2012.Universal Transverse Mercator projection, zone 15N, North American Datum of 1983. North American Vertical Datum of 1988.GIS and cartography by James A. Berg, Shana Pascal, and Holly Johnson. Edited by Carrie Jennings and Ruth MacDonald.
STATE OF MINNESOTADEPARTMENT OF NATURAL RESOURCESECOLOGICAL AND WATER RESOURCES DIVISION
COUNTY ATLAS SERIESBLUE EARTH COUNTY
ATLAS C-26, PART B, PLATE 7 of 9Bedrock Groundwater Flow Directions
Prepared and Published with the Support of the MINNESOTA ENVIRONMENT AND NATURAL RESOURCES TRUST FUND and the CLEAN WATER, LAND AND LEGACY AMENDMENT
Uppermost Bedrock Groundwater Flow Directions and Bedrock Geology
By James A. Berg
2016
The DNR Information Center
Minnesota Department of Natural ResourcesEcological and Water Resources Division500 Lafayette RoadSt. Paul, MN 55155-4025For more information call 651-296-6157 or 888-646-6367http://www.mndnr.gov/waters
This information is available in alternative format on request.
The Minnesota DNR prohibits discrimination in its programs andservices based on race, color, creed, religion, national origin,sex, public assistance status, age, sexual orientation, or disability.Persons with disabilities may request reasonable modifications toaccess or participate in DNR programs and services by contactingthe DNR ADA Title II coordinator at [email protected] or651-259-5488. Discrimination inquiries should be sent to MinnesotaDNR, 500 Lafayette Road, St. Paul, MN 55155-4049; or Officeof Civil Rights, U.S. Department of the Interior, 1849 C St. NW,Washington, DC 20240.
© 2016, State of Minnesota, Department of Natural Resources and the Regents of the University of Minnesota.
LOCATION DIAGRAM
s2
su
st
sm
se
Sampled well and aquifer symbolsPrairie du Chien
Prairie du Chien–Jordan
Jordan
St. Lawrence
St. Lawrence and Upper Tunnel City
St. Lawrence, Upper Tunnel City, and Wonewoc
Upper Tunnel City
Upper Tunnel City and Wonewoc
Mt. Simon
Upper Tunnel City, Wonewoc, and Mt. Simon
Recent: water entered the ground since about 1953 (8 to 15 tritium units [TU]).
Mixed: water is a mixture of recent and vintage waters (greater than 1 TU to less than 8 TU).
Vintage: water entered the ground before 1953 (less than or equal to 1 TU).
Well was not sampled for tritium.
Tritium ageSymbol color indicates tritium age of water sampled.
Symbols and labelsIf shown, arsenic concentration equals or exceeds 5 parts per billion.
10.3
If shown, chloride concentration equals or exceeds 5 parts per million.
9.4
If shown, nitrate-nitrogen concentration equals or exceeds 1 part per million.
9.7
If shown, groundwater residence time in years, estimated by carbon-14 (14C) isotope analysis
29,000
Groundwater conditions
Groundwater moves from an overlying surficial aquifer to a buried aquifer
Groundwater moves from an overlying buried aquifer to an underlying buried aquifer
Groundwater discharge from a buried aquifer to surface water
Groundwater flows laterally
Groundwater flowpath is unknown (deep ground-water with recent or mixed tritium age)
Line of cross sectionStatic water level dataSurface-water sample
(Some conditions shown are interpreted and do not correspond to tritium data locations.)
St. Lawrence Formation*_sl
Eau Claire Formation*_e
Oo Oneota Dolomite (Prairie du Chien)*
Bedrock aquifers and aquitardsPlatteville-Glenwood formations¹
Tunnel City_tc
Wonewoc_w
Mt. Simon1The Glenwood Formation acts as an aquitard but the overlying Platteville Formation is a thin aquifer. Combined, these units are shown as an aquitard.*aquitard
_m
Shakopee (Prairie du Chien)
St. Peter
Jordan
Opg
Os
Osp
_j
1 0 1 2 3 4 5 MILES
1 0 1 2 4 5 6 7 83 9 KILOMETERS
SCALE 1:100 000
Groundwater flow directionUpper geologic units (St. Peter Sandstone, Prairie du Chien Group, and Jordan Sandstone)Lower geologic units (St. Lawrence Formation, Tunnel City Group, Wonewoc Sandstone, Eau Claire Formation, and Mt. Simon Sandstone)
Potentiometric surface contour(dashed where approximate)
Upper geologic units (St. Peter Sandstone, Prairie du Chien Group, and Jordan Sandstone)
Lower geologic unit (Tunnel City Group, Wonewoc Sandstone, Eau Claire Formation, and Mt. Simon Sandstone)
940
940
Fractured aquitard (St. Lawrence Formation and Eau Claire Formation)
940
