https://ir.uiowa.edu/igs_ofm/1006/thumbnail.jp

Bettis, E Arthur, III

Bunker, Bill J

Giglierano, James D

Haiar, Kurt

Howes, Mary R

Ludvigson, Greg A

Roberts, Eric

Slaughter, Maureen K

Whitsett, T Michael

English

Iowa Research Online

Qds
Qps5
Qds
Qwa2
Qds
Qwa2
Qwa2
Qwa2
Qps5
Qps5
Qds
Qwa2
Qwa2
Qwa1
Qwa1
Qwa2
Qds
Qds
Qps5
Qps5
Qds
Qps5Qps5
Qdl
W
W
W Qds
Qnw
Qds
Qps2
Dpr
W
W
Qdl
QnwQps5 Qps5
Qps2
Qdb
Qds
Qds
Qdl
W Qwa1Qps2
Qnw
Qds
Qps5
Qnw Qwa2
W
QdsQps5
Qnw
Qnw
Qds
Qwa2
Qwa1
Qnw Qwa2
Qps5
Qnw
Qnw
Qds
Qps2 Qwa2
Qds
Qdl
Qds
Qps5Qnw
Qnw Qwa1
Qwa2
Qnw
Qwa1
QnwQdl
Dob
Qps5
Qwa2
Qds
QdsQps2
Qds
Qwa2
Qnw Qdl
Qds
Qwa1
Qds
Qwa2
Qnw
Qwa2
Qds
Dob
Qds
Qps6
Qps5Qps2
Qds
Qps2
Qnw
Qwa2
Qds
Qps6 Qwa2Qps6
Qps5
Qds
Qnw Qnw
Qds
Qnw
Qps5 Qnw
Qdl
Qps5
Qwa2
Qps5
Qps2
Qds
Qps5
Qnw Qps2
Qps5
Qps6
Qds
Qds
Qwa1
Qps6
Qdl
Qdl
Qwa2
Qwa1
Qps1
Qwa1 Qps5
Qps2Qds
Qwa2
Qds
Qds
Qps1
Qds
Qwa1 Qnw
Qwa1
Qps1
QnwQwa1
Qwa1 Qdl
Qds
Qps5
Qds
Qwa1
Qnw
Qwa1
Qwa2
Qnw
Qwa1
Qds
Qwa2
Qwa1Qps5Qds Qwa2Qps1 Qwa2Dob
Qps5
Qwa1
Qnw
Qps2
Qps5Qwa1
Qnw
Qds
Qps5
Qps5 Qwa1Qds
Qps5
Qdl
Qds
Qwa2
Qps5Qnw
Qds
Qdl
Qwa1Qwa2
Qps5
Qds
Qwa2
Qwa2
Qps5
Qps2
Qds
Qps6
DprQps5
Qds
Qnw
Qwa1
Qwa2
Qwa1
Qwa1
Qps5
Qwa1Qwa1 Qwa2
Qnw
Qnw
Qps5
Qwa1
Qps5
Qnw
Qps6Qnw
Qds
Qps5
Qds
Dob
Qnw Qwa1Qds
Qwa1
Qps5
Qnw
Qds
Qps6
Qdl
Qnw
Qnw
Qds
Qnw
Qps6 Qds
Qds
Qds
QdsDpr
Qnw Qnw
Qnw Dob Dpr
Qds
Qps5
Qps6
Qps2 Qnw Qdl
Qps6
Dob
Dob Qps5
Qwa2
Qds
Qnw
Qps1
Qwa1
Qds
QnwQps5Dpr
Qwa1
Qnw Qps2
Qwa1
Qds
Qps2
Qps5
Qps5
Qnw
Qds
Qds
Qps5
Qps6
Qps5
Qds
Qdl
Qwa1
Dpr
Qps2Dob
Qwa2
Dob
Qps6Qnw
Qps2
Dob
Qds
Dob
Qwa2
Qds
Qds
Qps6
Qds
Dob
Qps6
Qps1
Qwa1 Qps5Qps5Qps2
Qwa2
Qds
Qp
Dpr
Qds
Qnw
Qwa2
Qnw
Qps5Qdl
Qps2
Qps5
Qnw
Qds
Qwa2
Dob
Qps6
Qps6
QdlQps5
Qps2
Qds
Qps6
Qps6
Qds
Qps5
Qwa2 Qdb
Qps6
Qds
Qps5
Qwa1
Qds
Qnw Qps5
Qps5
Qds
Qwa1
Qdb
Qps5
Qds
Qps2
Qps2
W Qnw
QdsQdb
QdlQds
Qps5
Dob
Qnw
Qwa1
Qds
Qps6
Dpr
Qds
Qnw Qwa2
Qps5Qds
Qwa2
Qdl
Qps5
Qps5
Qds
Qds
Qps2
Qps4
Qps5
Dob
Qds
Qps5
Qps5
Qps1
Qps5
Qps2
Qds
Qnw
Qps1
Qds
Qnw Qds
Dob
Qps5
Qds
Qwa2
Dob
Qdl
Qds
Qds
Qdb QdlQds
Qps5Qps5
Qps1Qps2
Qps2
Qps1
Qps3 Qps1
Qps2 Qps2
Qds
Dob
Qps5 Qps5
DobQps2Qps2 QdsQdb Qps1
Qds
Qds
Qps2
Qps2
Qps2 QdsQps2
Qps1
Qds
Qps5
Qds
QdsQds Qps2
Qdb
QdlQps5
Qps1
Qps5
Qds
Qps1
Qps2
Qds
Qps5
Qwa2
DobQds
Qps1
Qds
Qwa2
Qwa1 Qds
Dpr
Qps5
Qps5
Qps5 QnwQwa2
Qps2 QnwQds
Dob
Qps5
Qps1 Qds Qds
Qps4
Qps6Qps5Qps5
Qps1
Qds
Qps5
Qps5
Qdl
Qps5
Qps2Qwa1 Qds
Qps5
Qps5
Qpt Qds
Qps2Qps4Qwa2
Qps2
QdsQps5
Qps5Qps5
Qwa2
Qwa2
Qps1
Qwa2
Qps5
Qps2
Qps2
Qps4
Qps2
Qps5
Qnw
Qwa2 Qps6
Qps5 Qps6
Qds
Qds Qds
Qwa2Qps5
Qds
Qps5
Qpt
QdsQps4
Qps5Qwa1QdsQps5
Qds
Qds
Qps4
Qwa1
Qps5 Qps4
Qdl
Qps3
QnwQps5
Qds
Qps1
Qnw
Qwa1W Qds
Qwa2
Qps5
Qds
Qps3
Qps5Qps4
Qps2
Qwa1
Qds
Qds
W
Qwa1
Qps5 Qwa1
Qps2
Qps5 Qps5 Qwa1
Qps4 Qds
Qwa2
Qwa1
Qps2
Qps5
Qps1
Qds
Qps2Qdl
Qps2Qps5
Qds
Qwa1
Qwa1
Qwa1
Qps2
Qps4
Qps2
Qds
Qps2
Qps5 Qds
Qps5
Qps2 Qps5
Qps2 Qps4
Qpt
Qds
Qwa2 Qps5
Qps1
QdsQps5 Qwa2
Qps5
QdsQps2
Qdl
Qps6
Qwa2
Qps2
Qwa1
W
Qps5 QdsQdsQds
Sg
Qnw
Ssg
Qps1
Qps5
Qps5
Qnw
Qds
Qds
Qwa1
Qps5 QnwQds
QdsQds
Qdl
Qps5 Qps2 Qds
Qnw
Qdl
Qps5
Qdl
Qps5
Qps5
Qps2
Qds
Qps6
SsgQps1 SgQps2
Qds
Qds
Qps5
Qps2
Qps5
Qds
Qdl
Qwa2
Qps5
SgQwa2
Qds
Qdl Qds
Dob
Qds
Sg
Qps5Qps5 Qps2
Qwa2
Qwa2
Qps2
Qds
Qps5
Qps5 QpQdb
Qps2
Qps5
Qps5 Qps5
Qps6Sg
Qnw Qdl
Qds
Qwa1
Qnw
Qps2
Qwa1
QpQds
QnwQps5
Qdb
Qps5
Qps2Qwa2
Qdl
Qps5
Qds
Qnw
Qwa2Qps2
QnwQps2 Qdl
Qps5
Qnw
Qdl
WQwa1 Qps2
Qwa2Qps5 SgQps5 Qdb
Qnw
W
Qds QnwQdl
Qps2
Qps5
Qps5
Qps5
Qnw
Qps2
Qnw
Qps5Qps5
Qdl
Sg
Qds
Qps5 Qwa1
Sg
Qps5 Qnw
Qnw
Qwa2 Qps6
Qds
Qwa1
Qps5
Qps5
Qwa1
Qdl
Qwa2
Qnw
Qps2
Qnw
QnwQnw
Qds
Sg
W
SgQps5 Qps5
Qps5Qps5
Sg
Qps6
Qps5
Qps5
Qnw
Qps1
Qwa1
Qps5Qps6Qnw
Qnw
Qnw Qwa1
Qwa1
Qps2
Qps5
W
Qnw
W
Qps5
Qwa1
Qwa1
QdsQps5
Qdb
Sg
Qps5
Qnw
Qdl
Qps5
Qds
Qps5
Qps5
Qps5 Qnw
Qnw
Qdl
Qds Qds
Qwa1
Qwa1
Qwa1
Qwa1
Qwa1
W
Qps5 Qwa1
Qps5
Qps2
Qps2
Qps5 Qds
QdsW
Qnw
Qwa1
Qps5
Qnw
Qds
Qnw
Qnw
Qps5
Qnw
Qps1
Qwa1
Qwa2
Qds
QdsQnwQps5
Qwa2
Qds
Qps2
Qwa1
Qps2 Qwa2Qps5
Qnw Qnw
Qnw
Qnw
Qwa2
Qdl
Qps3
Qps2
Qwa2
Qds
Qnw
Qds
Qwa1
Qps2
Qps5
QdsQps2 Qds
Qps5
Qnw
Qps5
Qps5 Qwa1
Qds
Qwa1
Qwa2
Qwa1
Qps5
Qdb
Qwa2
Qds
Qnw
Qps2 Qps2 Qps5 Qdl
Qps1
Qdl
Qwa2
Qwa2
Qds
Qdb
QnwQps2
Qps5
Qwa2
Qps1
Qwa1
Qwa2
Qds
Qps5
QdsQps5
Qwa2 Qwa1 Qwa2
Qwa2
Qwa2 Qds
Qps5
Qwa2Qps5
Qdl
Qwa2
Qwa2
Qds
Qwa2
Qwa2
Qps1 Qwa2
Qps5
Qdl
Qwa2
Qds
Qwa2Qps1 Qnw
Qwa2 Qps2
Qps5
Qwa2Qps5
Qps5
Qps1
Qps1
Qwa2
Qdl
Qwa2
Qwa2
Qwa2
Qps5
Qwa2
Qps5
Qps5
Qnw
Qnw
Qps1
Qps5 QnwQps5
Qps5
Qwa2
Qps5 Qwa2 Qps5
Qps2
Qps1
Qps5
Qwa2 Qds
Qds
Qds
QdsQps5
Qps2
Qps5
Qdb
Qwa1Qps5
Qds
Qps5
Qps5
Qds
Qwa2Qps5
QdbQps5
Qwa2
Qps5
Qds
Qdl
Qps5
Qnw
Qps5
Qds
Qnw Qds Qps2
Qps5
Qwa2
Qps5
Qps5 Qps5
Qps5
Qds
Qds
Qps5
Qnw
Qps5
Qps5
Qps5
QdsQwa2
Qwa1Qps5 Qps5
Qds
Qds
Qps5
Qwa2
Qds
Qds Qds
Qps5
Qwa1
Qds
Qps5
Qds
Qdb
Qds Qwa2
Qds
Qps5
Qds
Qps5
Qwa2
Qps5
Qwa1
Qps5
Qwa2
Qnw
Qds
Qwa2
Qnw
Qps5
Qds
Qdl
Qwa1
Qds
Qds
Qps5
Qdl Qds
Qwa2
W
Qdl
Qps5
Qds QdsQdl
QdlQnw
Qwa1
Qps5
Qwa2
Qds
Qds
Qwa1
Qds
Qds
Qnw
Qds Qps5 Qdl
Qdb
Qwa1
QnwQds
Qwa1
Qdl
Qps5
Qds Qds
Qps5
Qwa1
Qdl
Qdl
Qwa1
Qwa2
Qnw
Qds
Qds
Qds
Qwa1
Qwa2
Qnw
Qwa2
Qdb
Qps5 Qds
Qwa2
Qwa2
Qwa2
Qds
Qds
Qps5 Qds
Qnw
Qps5
Qwa1
Qwa2
Qds
Qps5
Qds
Qds
Qnw Qdl
Qds
Qds Qnw
Qwa2
Qds
Qps5
Qps5 Qds
Qnw
Qps5
Qwa2
Qds
Qds
Qds
Qwa2 QnwQwa1
Qnw
Qnw
Qdl
Qds
Qds
Qds
Qps5Qnw
Qwa2
Qnw
Qps5
Qds Qwa2
Qwa1 Qdl
Qps5
Qwa2
Qnw
Qnw
Qnw
Qwa1 Qwa1
Qwa1
Qwa2
Qps5 Qnw
QdsQds
Qds
Qnw
Qwa2Qnw
Qdl
Qps5
Qds
Qds
Qnw
Qwa2
Qds
Qwa1 Qds
QdsQwa2
Qwa2
Qds
Qwa2
Qwa1
Qds
Qds
Qnw
Qdl
Qnw
Qps6
Qnw
Qps6
Qpt
Qnw
Qds
Qwa2
Qds
Qds
Qds
Qds
Qdl
Qnw
232221201924
262728293025
353433323136
234561
7 8 9 1012 11
18 1713 16 15 14
19 2024 21 22 23
28 2730 2925 26
33 34323136 35
Qds
0 1 2 Miles
Scale
1:24000
N
A
B
C D
91  30’ 00"
42  15’ 00"o
o
91  37’ 30"
42  15’ 00"
o
o
42  07’ 30"
91  37’ 30"
o
o
42  07’ 30"
91  30’ 00"
o
o
SURFICIAL GEOLOGIC MATERIALS
     OF THE CENTRAL CITY QUADRANGLE
Qdl ALLUVIUM (DeForest Formation) -- Two to four meters of massive to moderately well stratified loam, silt loam,
clay loam, or loamy sand overlying more than three meters of poorly to moderately well sorted, massive to well
stratified, coarse to fine feldspathic pebbly sand and gravel of the Noah Creek Formation.  Seasonally high
water tables occur in this map unit.
LEGEND
Description of Map Units
Unit Description
Holocene
Qds ALLUVIUM (DeForest Formation) -- One to three meters of massive to weakly stratified, grayish brown to
brown loam, silt loam, clay loam, or loamy sand overlying less than three meters of poorly to moderately well
sorted, massive to moderately well stratified, coarse to fine feldspathic quartz sand, pebbly sand, and gravel.
Unit also includes colluvial deposits derived from adjacent map units.  Seasonally high water tables occur in
this map unit.
Qdb MUCK AND PEAT (DeForest Formation, Woden Member) -- One to six meters of black to brown muck, peat,
and other organic-rich deposits in fens.  Massive to well stratified at depth.  Overlies sand and gravel and/or
massive, fractured, loamy glacial till of the Wolf Creek or Alburnett formations.  High water tables occur in
this map unit.
W WATER
Late Wisconsinan
Qpt LOESS AND INTERCALATED EOLIAN SAND (Peoria Formation) -Two to seven meters of yellowish brown to
gray, massive, jointed, calcareous or noncalcareous, silt loam and intercalated fine to medium, well sorted,
feldspathic quartz sand.  Grades downward to poorly to moderately well sorted, moderately to well stratified,
coarse to fine feldspathic quartz sand, pebbly sand, loam, or silt loam alluvium, or in some places the eolian 
sediments bury a clayey Farmdale/Sangamon Soil developed in Pre-Wisconsinan alluvium. 
Qps1 LOESS AND INTERCALATED EOLIAN SAND (Peoria Formation) - Five to ten meters of yellowish brown to
gray, massive, jointed, noncalcareous grading downward to calcareous silt loam and intercalated fine to
medium, well sorted, feldspathic quartz sand.  Sand is most abundant in the lower part of the eolian package. 
Overlies massive, jointed, loamy glacial till of the Wolf Creek or Alburnett formations with or without intervening
clayey Farmdale/Sangamon Paleosol. 
Qps2 EOLIAN SAND (Peoria Formation - sand facies) -- Five to fifteen meters of yellowish brown to gray, moderately
to well stratified noncalcareous or calcareous, fine to medium, well sorted, feldspathic quartz sand.  May contain
interbeds of yellowish brown to gray, massive, silt loam loess.  Overlies eroded, massive, jointed, loamy glacial
till or fractured Devonian-age carbonate bedrock.
Qps3 LOESS SHALLOW TO GLACIAL TILL (Peoria Formation) -- Two to three meters of yellowish brown, massive,
noncalcareous silt loam and intercalated fine to medium, well sorted, feldspathic quartz sand.  Sand, if present,
occurs in lower part of unit.  Overlies 0.5 to 1.5 meters of pebbly loam erosion surface sediment which, in turn,
overlies eroded, massive, jointed, firm, loamy glacial till of the Wolf Creek or Alburnett formations.  Seasonally
high water tables may occur in this map unit.
Qps4 LOESS SHALLOW TO SAND AND GRAVEL (Peoria Formation) -- One to two meters of yellowish brown,
massive, noncalcareous silt loam.  Overlies pebbly sand and gravel erosion surface sediment that is one to four
meters thick, which, in turn, overlies eroded, massive, jointed, firm, loamy glacial till of the Wolf Creek or Alburnett
formations, or fractured Devonian-age carbonate bedrock.  Seasonally high water tables may occur in this map unit.
Qps5 EOLIAN SAND SHALLOW TO GLACIAL TILL (Peoria Formation - sand facies) -- Two to four meters of yellowish
brown, massive to well stratified, noncalcareous, fine to medium, well sorted feldspathic quartz sand.  Overlies
pebbly loam erosion surface sediment which, in turn, overlies eroded, massive, jointed, firm, loamy glacial till of
the Wolf Creek or Alburnett formations.
Qps6 EOLIAN SAND SHALLOW TO ROCK (Peoria Formation - sand facies) -- One to four meters of yellowish brown,
massive to well stratified, noncalcareous, fine to medium, well sorted feldspathic quartz sand.  May overlie one
to two meters of loamy erosion surface sediment and/or less than two meters of eroded, massive, jointed, firm
loamy glacial till of the Wolf Creek or Alburnett formations.  Fractured Devonian-age carbonate bedrock is less
than five meters below the land surface.
Qwa1 SAND AND GRAVEL SHALLOW TO TILL (Unnamed erosion surface sediment) -- One to three meters of
yellowish brown to gray, massive to weakly stratified, noncalcareous, medium to coarse, poorly sorted
feldspathic pebbly quartz sand with intercalated gravel and loam.  Overlies eroded, massive, jointed, firm, 
loamy glacial till of the Wolf Creek or Alburnett formations.  Deposits in this mapping unit are derived primarily
from erosion of glacial till in the adjacent drainage basin.  Seasonally high water tables may occur in this map
Qwa2 LOAMY AND SANDY SEDIMENT SHALLOW TO GLACIAL TILL (Unnamed erosion surface sediment) --
One to three meters of yellowish brown to gray, massive to weakly stratified, well to poorly sorted loamy, sandy
and silty erosion surface sediment.  Map unit includes some areas mantled with less than two meters of Peoria
Formation (loess and eolian sand).  Overlies eroded, massive, jointed, firm glacial till of the Wolf Creek and
Alburnett formations.  Seasonally high water tables may occur in this map unit.
Complexes
Qnw SAND AND GRAVEL (Noah Creek and Wolf Creek formations) -- More than three meters of yellowish brown
to gray, poorly to well sorted, massive to well stratified, coarse to fine feldspathic quartz sand, pebbly sand and
gravel.  In places mantled with one to three meters of fine to medium, well sorted feldspathic quartz sand
derived from wind reworking of the alluvium.  The unit encompasses deposits that accumulated in river and
stream valleys during the late Wisconsinan as well as exhumed Pre-Illinoian deposits of the Wolf Creek and
Devonian System
Dcv FRACTURED CARBONATE BEDROCK (Cedar Valley Group) -- Zero to forty meters of fossiliferous limestone
and dolostone used as a shallow bedrock aquifer.
Dpr FRACTURED CARBONATE BEDROCK (Pinicon Ridge Formation) -- Zero to twenty meters of unfossiliferous 
limestone, dolostone, and shale.  The basal shaley five meters are a confining unit that retards groundwater
infiltration.  The upper part of the unit is prone to karst development.
Anthropogenic Units
Qp QUARRIES AND PITS -- Limestone quarries and sand and gravel pits.  Extent as of 1990 shown.
Dob FRACTURED CARBONATE BEDROCK (Otis and Bertram Formations, undifferentiated) -- Zero to forty
meters of unfossiliferous to poorly fossiliferous dolostone and limestone.
Geological Survey Bureau
Open File Map Series 96-2
Prepared by
E. Arthur Bettis III
Greg A. Ludvigson
James D. Giglierano
Mary R. Howes
Bill J. Bunker
Maureen K. Slaughter
T. Michael Whitsett
Energy and Geological Survey Division
Geological Survey Bureau
September 1996
Supported by the U.S. Geological Survey, Department of Interior,
under assistance Award No. 1434-95-A-01362, and Bluestem Solid Waste Agency, City of
Cedar Rapids City Engineer, Linn County Regional Planning, Linn County Engineering, Wendling
Quarries Inc., Shive-Hattery Engineers and Architects Inc., and Howard R. Green Company.
Iowa Department of Natural Resources
Larry J. Wilson, Director
ACKNOWLEDGMENTS
Recognized for direct contributions to the map’s production:  D.L. Koch, R.R. Anderson,
B.J. Witzke, D.J. Quade, R.R. Rowden of the IDNR Geological Survey Bureau, R.D.
Mandel of Topeka, Kansas, Iowa City office of the U.S. Geological Survey - Water 
Resources Division, Department of Geology at Cornell College, Iowa Department of 
Transportation, U.S. Department of Agriculture - Natural Resources Conservation Service,
Linn County Engineering, Bluestem Solid Waste Agency, Linn County Planning and
Zoning, and landowners who granted access for field studies.  Special thanks is extended
to Rebecca Palmer, Director of Linn County Planning and Zoning, for coordination with
Silurian System
Sg FRACTURED CARBONATE BEDROCK (Gower Formation) -- Zero to thirty meters of laminated, unfossiliferous
dolostone.
Ssg FRACTURED CARBONATE BEDROCK (Scotch Grove Formation) -- Zero to fifty meters of fossiliferous, variably
porous and cherty dolostone used as a bedrock aquifer.
0 1 2 Kilometers
Eric Roberts
Kurt Haiar
government agencies and private businesses in Linn County.
unit.
Alburnett formations in upland positions.


Surficial geologic materials of the Central City Quadrangle

https://ir.uiowa.edu/cgi/viewcontent.cgi?article=1006&amp;context=igs_ofm

Surficial geologic materials of the Central City Quadrangle

Abstract

Similar works

Full text

Available Versions

Iowa Research Online