Surficial Geology of Rome Quadrangle - Illinois State Geological Survey
SURFICIAL GEOLOGY OF ROME QUADRANGLE PEORIA AND MARSHALL COUNTIES, ILLINOIS
Institute of Natural Resource Sustainability William W. Shilts, Executive Director ILLINOIS STATE GEOLOGICAL SURVEY E. Donald McKay III, Director
R. 9 E.
R. 8 E.
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North American Datum of 1983 (NAD 83) Projection: Transverse Mercator 10,000-foot ticks: Illinois State Plane Coordinate system, west zone (Transverse Mercator) 1,000-meter ticks: Universal Transverse Mercator grid system, zone 16 Recommended citation: Stumpf, A.J., 2010, Surficial geology of Rome Quadrangle, Peoria and Marshall Counties, Illinois: Illinois State Geological Survey, Illinois Geologic Quadrangle Map, IGQ RomeSG, 2 sheets, 1:24,000.
SCALE 1:24,000 1
0
1/ 2
1000
0 1
1000
3000
2000
1 MILE 4000
5000
0
.5
6000
7000 FEET
1 KILOMETER
BASE MAP CONTOUR INTERVAL 20 FEET SUPPLEMENTARY CONTOUR INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM OF 1929
© 2010 University of Illinois Board of Trustees. All rights reserved. For permission information, contact the Illinois State Geological Survey.
6
5
7
8
ADJOINING QUADRANGLES 1 Castleton 2 La Prairie Center 3 Lacon 4 Edelstein 5 Chillicothe 6 Dunlap 7 Spring Bay 8 Germantown Hills
TRUE NORT H
4
3
MAG NETI C NORT H
2
25925 e " 34380 " e e 34429 " " e 34157k 0 " k 24518 53 " " 24630e " 24519 c(fp) e 6 24731 e " " 24008 e 22102 " 22103 S e e " 34596 23400 e " " e " 34550 e " 01059 e " e " e " 21805 24623 22388 5e 24079 24010 e " 34430 e "e " " e 24504 500 24009 " e 01596 23397 " e 34195 k " " 23402 e " 34161 k
APPROXIMATE MEAN DECLINATION, 2010
R. 9 E.
Geology based on field work by Andrew J. Stumpf, C. Pius Weibel, Ardith K. Hansel, and Lisa R. Smith, 2002–2005.
Tiskilwa Formation
Sand and gravel; sand is fine- to coarse-grained; light yellowish brown to grayish brown; calcareous; contains some cobbles and scattered boulders; water saturated; locally contains intraclasts of diamicton in the upper part; calcite cemented in places; typical thickness 5 to 50 feet
Ashmore Tongue, Henry Formation
>5 feet of Peoria Silt over Batestown
p/l-b
Subglacial and ice-marginal sediments (till) deposited directly from Tiskilwa glacial ice; exposed where Peoria Silt and Batestown diamicton have been eroded; found throughout the uplands; on steep slopes may be overlain by slopewash (colluvium); absent in the Illinois River valley and tributary valleys, where removed by postglacial erosion; the lower part, the Delavan Member, is differentiated by color or presence of oxidation; unconformably overlies Ashmore Tongue, Roxana Silt, and older deposits; present as a discontinous veneer on bedrock (areas too small to be mapped)
t >5 feet of Peoria Silt over Tiskilwa
p/t Delavan Member (cross section only)
t-d
Proglacial fluvial (outwash) sediments deposited by meltwater from advancing Wisconsin Episode glaciers; overlies Pearl Formation, Glasford diamicton, or bedrock; present as sheets and channels fills beneath the Tiskilwa Formation; widespread in subsurface, but difficult to differentiate from the Mackinaw facies or older deposits
(cross section only)
h-a
Proglacial eolian (winddeposited) silt (loess) containing a cool-climate paleosol (Farmdale Geosol) deposited on a former land surface that was well to poorly drained; conformably overlies Pearl Formation or Glasford diamicton; distinctive mapping unit, but only locally preserved in the subsurface
Robein Member, Roxana Silt (cross section only)
r-r
Diamicton; massive; pebbly loam to silty clay loam; light yellowish brown (oxidized) to dark grayish brown (unoxidized); calcareous; firm to hard; contains some cobbles, boulders, and discontinuous beds of gravel, sand, or silt; contains many coal clasts and occasional wood fragments; upper part weathered in profile of Sangamon Geosol; typical thickness 5 to 20 feet
Glasford Formation (till) undivided
Sand and gravel; sand is fine- to coarse-grained; light yellowish brown to grayish brown; contains some cobbles; calcite cemented in some places; typical thickness 5 to 20 feet
Pearl Formation (outwash) undivided
Fine-grained sand, silt, and clay; stratified; silt loam to clay; light pinkish gray to brown; firm to stiff; typical thickness 5 to 20 feet
Glasford Formation (lacustrine) undivided
The Illinois State Geological Survey and the University of Illinois make no guarantee, expressed or implied, regarding the correctness of the interpretations presented in this document and accept no liability for the consequences of decisions made by others on the basis of the information presented here. The geologic interpretations are based on data that may vary with respect to accuracy of geographic location, the type and quantity of data available at each location, and the scientific and technical qualifications of the data sources. Maps or cross sections in this document are not meant to be enlarged.
g
Light-duty road, hard or improved surface
Secondary highway, hard surface
Unimproved road
State Route
Proglacial fluvial sediments deposited in former river channels or on uplands by meltwater from Illinois Episode glaciers; underlies Glasford diamicton; unconformably overlies bedrock
(cross section only)
pl
Proglacial lacustrine sediments deposited in lakes ponded in some tributary valleys beyond Illinois Episode glaciers; locally preserved in the subsurface
(cross section only)
g(l)
PRE-QUATERNARY Unit
Description Rock; shale, clay, sandstone, limestone, and coal; includes a variably thick weathered profile on the bedrock surface
Near-surface bedrock Carbondale Formation &c
Interpretation Bedrock or where rock is within 10 feet of land surface; includes strata of marine, estuarine, deltaic, fluvial, and swamp deposits; forms a very undulating surface that has been shaped by multiple cycles of fluvial and glacial erosion
Data Type $ T
Outcrop
$ T
Outcrop in field notes (ISGS archives)
" e
Stratigraphic boring
" e
Water boring
" e
Engineering boring
" e
Coal boring
" e
Other boring, includes oil and gas
ROAD CLASSIFICATION Primary highway, hard surface
Subglacial and ice-marginal sediments (till) deposited sediment directly from Illinois Episode glacial ice; mapped throughout the area, but only isolated remnants are preserved, having been largely removed by subsequent fluvial and glacial erosion; where present, it unconformably overlies older deposits or bedrock
(cross section only)
Digital cartography by Jennifer E. Carrell, Zahra Golshani, and Jane E.J. Domier, Illinois State Geological Survey.
2° 1
T. 10 N.
" 22886 e
25145
2 " 22355 22356 k " "01365 k e 23333 " " 23332 k k
23696
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550
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t
S
29
T. 11 N.
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700
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32
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0 54
21954
24657
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31
22442 e " 22440
)
S
Diamicton; massive; pebbly loam; light reddish brown to very dark gray; calcareous; firm to hard; jointed; contains some cobbles, scattered boulders, and discontinuous beds of stratified sand, silt, or clay; the lower part of the unit usually is not red in color, but dark gray, and may contain dispersed wood fragments and gastropod shells; typical thickness 10 to 120 feet
Subglacial and ice-marginal sediments (till) deposited directly from Batestown glacial ice; in some areas overlain by a veneer (
Institute of Natural Resource Sustainability William W. Shilts, Executive Director ILLINOIS STATE GEOLOGICAL SURVEY E. Donald McKay III, Director
R. 9 E.
R. 8 E.
c(fp)
70 0
p/t
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0
600
68
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h(m)
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25834
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2 $ T
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10 700
0 60
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T $
" G k " 34778 26045 e " k " k 01769e 34501 " 23464
T347 $
34268 34520 34613 700 34567 34239 34566 25838e " k " 700 34696 " 23472 " " k k e "e e " 34237 " 24032 e " "e " 22427 k 34695k " 22700 k " e 34689 T360 $ $ " "e "22079 e 22080 e T359
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T362 $ t
0
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T $
" e
" e
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0
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54
54
" 01496 e
23330
" 24500 " e "e e " e
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510
)
26055 e "
1
" 23982 e
24279
520
" e 24744
23331
0
520
)
" 22550 k 326
600
" 00551 e
North American Datum of 1983 (NAD 83) Projection: Transverse Mercator 10,000-foot ticks: Illinois State Plane Coordinate system, west zone (Transverse Mercator) 1,000-meter ticks: Universal Transverse Mercator grid system, zone 16 Recommended citation: Stumpf, A.J., 2010, Surficial geology of Rome Quadrangle, Peoria and Marshall Counties, Illinois: Illinois State Geological Survey, Illinois Geologic Quadrangle Map, IGQ RomeSG, 2 sheets, 1:24,000.
SCALE 1:24,000 1
0
1/ 2
1000
0 1
1000
3000
2000
1 MILE 4000
5000
0
.5
6000
7000 FEET
1 KILOMETER
BASE MAP CONTOUR INTERVAL 20 FEET SUPPLEMENTARY CONTOUR INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM OF 1929
© 2010 University of Illinois Board of Trustees. All rights reserved. For permission information, contact the Illinois State Geological Survey.
6
5
7
8
ADJOINING QUADRANGLES 1 Castleton 2 La Prairie Center 3 Lacon 4 Edelstein 5 Chillicothe 6 Dunlap 7 Spring Bay 8 Germantown Hills
TRUE NORT H
4
3
MAG NETI C NORT H
2
25925 e " 34380 " e e 34429 " " e 34157k 0 " k 24518 53 " " 24630e " 24519 c(fp) e 6 24731 e " " 24008 e 22102 " 22103 S e e " 34596 23400 e " " e " 34550 e " 01059 e " e " e " 21805 24623 22388 5e 24079 24010 e " 34430 e "e " " e 24504 500 24009 " e 01596 23397 " e 34195 k " " 23402 e " 34161 k
APPROXIMATE MEAN DECLINATION, 2010
R. 9 E.
Geology based on field work by Andrew J. Stumpf, C. Pius Weibel, Ardith K. Hansel, and Lisa R. Smith, 2002–2005.
Tiskilwa Formation
Sand and gravel; sand is fine- to coarse-grained; light yellowish brown to grayish brown; calcareous; contains some cobbles and scattered boulders; water saturated; locally contains intraclasts of diamicton in the upper part; calcite cemented in places; typical thickness 5 to 50 feet
Ashmore Tongue, Henry Formation
>5 feet of Peoria Silt over Batestown
p/l-b
Subglacial and ice-marginal sediments (till) deposited directly from Tiskilwa glacial ice; exposed where Peoria Silt and Batestown diamicton have been eroded; found throughout the uplands; on steep slopes may be overlain by slopewash (colluvium); absent in the Illinois River valley and tributary valleys, where removed by postglacial erosion; the lower part, the Delavan Member, is differentiated by color or presence of oxidation; unconformably overlies Ashmore Tongue, Roxana Silt, and older deposits; present as a discontinous veneer on bedrock (areas too small to be mapped)
t >5 feet of Peoria Silt over Tiskilwa
p/t Delavan Member (cross section only)
t-d
Proglacial fluvial (outwash) sediments deposited by meltwater from advancing Wisconsin Episode glaciers; overlies Pearl Formation, Glasford diamicton, or bedrock; present as sheets and channels fills beneath the Tiskilwa Formation; widespread in subsurface, but difficult to differentiate from the Mackinaw facies or older deposits
(cross section only)
h-a
Proglacial eolian (winddeposited) silt (loess) containing a cool-climate paleosol (Farmdale Geosol) deposited on a former land surface that was well to poorly drained; conformably overlies Pearl Formation or Glasford diamicton; distinctive mapping unit, but only locally preserved in the subsurface
Robein Member, Roxana Silt (cross section only)
r-r
Diamicton; massive; pebbly loam to silty clay loam; light yellowish brown (oxidized) to dark grayish brown (unoxidized); calcareous; firm to hard; contains some cobbles, boulders, and discontinuous beds of gravel, sand, or silt; contains many coal clasts and occasional wood fragments; upper part weathered in profile of Sangamon Geosol; typical thickness 5 to 20 feet
Glasford Formation (till) undivided
Sand and gravel; sand is fine- to coarse-grained; light yellowish brown to grayish brown; contains some cobbles; calcite cemented in some places; typical thickness 5 to 20 feet
Pearl Formation (outwash) undivided
Fine-grained sand, silt, and clay; stratified; silt loam to clay; light pinkish gray to brown; firm to stiff; typical thickness 5 to 20 feet
Glasford Formation (lacustrine) undivided
The Illinois State Geological Survey and the University of Illinois make no guarantee, expressed or implied, regarding the correctness of the interpretations presented in this document and accept no liability for the consequences of decisions made by others on the basis of the information presented here. The geologic interpretations are based on data that may vary with respect to accuracy of geographic location, the type and quantity of data available at each location, and the scientific and technical qualifications of the data sources. Maps or cross sections in this document are not meant to be enlarged.
g
Light-duty road, hard or improved surface
Secondary highway, hard surface
Unimproved road
State Route
Proglacial fluvial sediments deposited in former river channels or on uplands by meltwater from Illinois Episode glaciers; underlies Glasford diamicton; unconformably overlies bedrock
(cross section only)
pl
Proglacial lacustrine sediments deposited in lakes ponded in some tributary valleys beyond Illinois Episode glaciers; locally preserved in the subsurface
(cross section only)
g(l)
PRE-QUATERNARY Unit
Description Rock; shale, clay, sandstone, limestone, and coal; includes a variably thick weathered profile on the bedrock surface
Near-surface bedrock Carbondale Formation &c
Interpretation Bedrock or where rock is within 10 feet of land surface; includes strata of marine, estuarine, deltaic, fluvial, and swamp deposits; forms a very undulating surface that has been shaped by multiple cycles of fluvial and glacial erosion
Data Type $ T
Outcrop
$ T
Outcrop in field notes (ISGS archives)
" e
Stratigraphic boring
" e
Water boring
" e
Engineering boring
" e
Coal boring
" e
Other boring, includes oil and gas
ROAD CLASSIFICATION Primary highway, hard surface
Subglacial and ice-marginal sediments (till) deposited sediment directly from Illinois Episode glacial ice; mapped throughout the area, but only isolated remnants are preserved, having been largely removed by subsequent fluvial and glacial erosion; where present, it unconformably overlies older deposits or bedrock
(cross section only)
Digital cartography by Jennifer E. Carrell, Zahra Golshani, and Jane E.J. Domier, Illinois State Geological Survey.
2° 1
T. 10 N.
" 22886 e
25145
2 " 22355 22356 k " "01365 k e 23333 " " 23332 k k
23696
" 22453 "e 22883 e S
550
)
t
S
29
T. 11 N.
" e 500
" 22357 e
)
700
"23334 e " 01586 23695 e " e " e
" 23335 k
T 327 $
" e 23618
" 22599 k
)
3
h(m)
32
A
" e 24042 h(p)
0 54
21954
24657
25115 e "
31
22442 e " 22440
)
S
Diamicton; massive; pebbly loam; light reddish brown to very dark gray; calcareous; firm to hard; jointed; contains some cobbles, scattered boulders, and discontinuous beds of stratified sand, silt, or clay; the lower part of the unit usually is not red in color, but dark gray, and may contain dispersed wood fragments and gastropod shells; typical thickness 10 to 120 feet
Subglacial and ice-marginal sediments (till) deposited directly from Batestown glacial ice; in some areas overlain by a veneer (
