Key Outcrop, Boring, and Well-Log Descriptions for the
Surficial Geologic Map of the Alton 7.5' Quadrangle
New Cores Drilled for 1997 STATEMAP project
ALT-1 (#27036: C-14708 17-50')
Location: SW,SW,NE,Sec.25,T6N,R10W Alton 7.5'
Elevation: 562'surface; 505' bedrock
Property Owner:Henry Bush
Site Description: in orchard, 43 m north of Humbert Rd., 40 m east of garage
Date Drilled: 7/14/97/
Driller and Rig: Charles Dolan, Geoprobe
Geologists Present: David Grimley, Brett Denny
Described By: David Grimley
|
Formation |
Depth (ft.) |
Color |
Texture |
Other |
|
Peoria Silt |
0-4 |
10YR 5/5
|
sil to sicl |
leached , modern A, E, Bt horizons, mottles 10YR 7/2 |
|
" |
4-8 |
1Y 6/2-5/3 |
sil |
leached, CB horizon, mottles |
|
" |
8-9.5 |
10YR 5/3 to 6/2 |
sil |
leached, CB horizon, mottles |
|
Roxana Silt |
9.5-12 |
10YR 4.5/4 |
sil |
leached, slightly pink, some grey mottles |
|
" |
12-15 |
10YR 5/4-5/5 |
heavy sil |
leached; slightly mottled; few Mn spots |
|
" (Markham M.) |
15-17 |
10YR 5/3
|
sicl to heavy sil |
some sand (5%), has hints of colluvium; has 10YR 6/2 iron depletions and 10YR 6/6 stains |
|
Ft. Russell till |
17-20 |
2.5Y 6/2- 10YR 5/6 |
sicl-sic |
solum of Sangamon Geosol; some pebbles and sand, leached |
|
" |
20-23 |
10YR 6/2 - 6/6 |
sicl |
BC horizon of Sangamon; moderately to poorly drained |
|
sand |
23-25 |
2Y 5/4 |
loamy sand |
not well sorted; ice contact sediment, saturated, calcareous at 24' |
|
Ft. Russell |
25-27 |
2.5Y 5/4 |
loam dm. |
calcareous till to base of core; oxidized, C hor. |
|
" |
27-28 |
2.5Y 5.5/3 |
loam dm. |
CD horizon; somewhat oxidized |
|
" |
28-36 |
5Y 4.5/1 |
loam dm. |
D horizon; uniform greenish-grey |
|
" |
36-40 |
5Y 4.5/1 |
sil-loam dm. |
D horizon; uniform, occasional small wood fragments |
|
" |
40-52 |
5Y 4.5/1 |
sil dm. |
D horizon; some Pennsylvanian shales and siltstones; wood (spruce ?) up to one inch |
|
" |
52-57 |
|
|
no samples; refusal at 57' with 1.25 inch probe |
ALT-2 (#27037: C-14709 27-55')
Location: SE,NE,Sec.31,T6N,R9W Alton 7.5'
Elevation: 530' (5' below top of landscape); rock at 473'
Property Owner: Alpha Church
Site Description: on field east of pavilion 86 m north of Harris Rd., 62 m east of gravel road; near Harris and Seminary Roads.
Date Drilled: 7/15/97
Driller and Rig: Charles Dolan, Geoprobe
Geologists Present: David Grimley, Brett Denny
Described By: David Grimley
|
Formation |
Depth (ft.) |
Color |
Texture |
Other |
|
Peoria and Roxana Silts Sangamon Geosol |
0-20 |
|
|
no samples collected |
|
sand |
20-23 |
2.5Y 5.5/4 |
loamy sand |
soft, wet, leached |
|
Ft. Russell |
23-24 |
2.5Y 5/5 |
loam dm. |
C horizon, calc. |
|
sand |
24-25.5 |
2.5Y 5/4 |
loamy sand |
soft, wet, calc. |
|
Ft. Russell |
25.5-28 |
2.5Y 5.5/4 |
loam dm. |
C hor., uniform, calc., mostly dolomite |
|
" |
28-32 |
|
|
no sample |
|
" |
32-36 |
5Y 4.5/1.5 |
loam-sil dm. |
D hor., some wood fragments, unoxidized., calc., mostly dolomite |
|
" |
36-40 |
|
|
no sample |
|
" |
40-44 |
5Y 4/1 |
sil dm. |
D horizon |
|
silt |
44-45 |
5Y 4/1.5 |
silt |
D horizon |
|
Ft. Russell |
45-47 |
2.5Y 5/1.5 |
loam-sil dm. |
D horizon |
|
sand |
47-48 |
2.5Y 5.5/1 & 3/2 |
loamy sand |
D horizon; some calcite |
|
Ft. Russell |
48-52 |
2.5Y 4.5/1 |
loam dm. |
D horizon; some calcite and dolomite; dry, tough drilling |
|
Ft. Russell |
52-57 |
|
|
no sample |
ALT-3 (#27038: C-14710 25-50')
Location: SE, Sec.33,T6N,R10W Alton 7.5'
Elevation: 626'; rock at 570'
Property Owner: Rick McCormick, 4618 Levis Lane
Site Description: on SW corner of property near new construction
Date Drilled: 7/15-16/97
Driller and Rig: Charles Dolan, Geoprobe
Geologists Present: David Grimley, Brett Denny
Described By: David Grimley
|
Formation |
Depth (ft.) |
Color |
Texture |
Other |
|
Peoria Silt |
0-20 |
|
|
no sample, soft |
|
Roxana Silt |
-22 |
9YR 5/4 |
sil |
uniform, CB hor. |
|
" |
-24 |
10YR 5/4 |
sil |
Mn stains, CB hor. |
|
Teneriffe Silt |
-27 |
10YR6/3- 5/6 |
sic |
mottled, B and BC hor. of Sangamon Geosol |
|
Ft. Russell |
-28 |
10YR 5/4 - 5/6 |
loam dm. |
CB hor., pebbles, ghosts of gabbro grains, lithologic variety |
|
" |
-32 |
|
|
no sample |
|
" |
-36 |
2.5Y 5.5/4 |
loam dm. |
C hor., pebbly, sandy, calc. variety of erratic pebbles 6" silt zone at 33-33.5', soft |
|
" |
-38.5 |
2.5Y 6/4 |
" |
C hor., strongly calc. |
|
" |
-40 |
2.5Y 5/2 |
" |
DC hor., strongly calc.., pockets of Petersburg Silt, incorporated coarse silt |
|
" |
-42.5 |
2.5Y 5/4 |
loam dm. sandy loam, silt |
partially sorted sediment, fine sands, and loose diamicton |
|
sand, gravel |
-45 |
2.5Y 5/4 |
sand and gravel |
outwash; medium and coarse sand, fine gravel; calc. |
|
Ft. Russell |
-46 |
10YR 5/6 |
loam dm. |
oxidized underneath the sand layer |
|
" |
-52 |
5Y 4.5/1 |
loam dm. |
D hor., uniform, 4" sand break at 51 feet; till looks like that of ALT-1 and ALT-2 |
|
? |
-56 |
|
till or bedrock rubble; prob. hit bedrock no sample due to lost core barrel |
|
ALT-4 (#27039: C-14711 28-32')
Location: near center, Sec.28,T6N,R10W Alton 7.5'
Elevation: 590' , rock at 558'
Property Owner: Camp Warren Levis
Site Description: 31 m west of entrance road to the camp, 21 m north of cross road near the entrance
Date Drilled: 7/ 16 /97
Driller and Rig: Charles Dolan, Geoprobe
Geologists Present: David Grimley, Brett Denny
Described By: David Grimley
|
Formation |
Depth (ft.) |
Color |
Texture |
Other |
|
Peoria and Roxana Silts |
0-25 |
|
|
no sample, soft with 1.25" rod |
|
Sangamon Geosol |
-26 |
|
|
no sample, tougher with 1.25" rod |
|
till |
-27 |
|
|
no sample, much tougher with 1.25" rod |
|
Omphghent ? |
-30 |
5Y 6/3 |
sic dm. |
stained 10YR 5.5/6 on joints calc., mod.-strongly dolomitic |
|
" |
-32 |
2.5Y 6/4 |
sic dm. |
" |
|
|
|
|
|
limestone at 32'; refusal |
ALT-5 (#27040)
Location: SE, Sec.27,T6N,R10W Alton 7.5'
Elevation: 605'
Property Owner: Pete Williams, 3308 Amber Ct.
Site Description: on lawn 31 m south of driveway, 15 m west of road
Date Drilled: 7/ 18 /97
Driller and Rig: Charles Dolan, Geoprobe
Geologists Present: David Grimley, Brett Denny
Described By: David Grimley
|
Formation |
Depth (ft.) |
Other |
|
Peoria/Roxana |
0-26 |
no sample, soft push with 1.25" rod; loess |
|
Ft. Russell till |
26-40 |
no sample, tougher push with 1.25" rod at 26-28' (Sangamon?); very tough at 28-40'; bedrock not reached; could not proceed further in reasonable time |
ALT-6 (#27041: C-14712 25-28')
Location: NE,NW,NW,Sec.12,T6N,R10W Alton 7.5'
Elevation: 646'
Property Owner: Mr. and Mrs. Schaefer, 8502 Montclair Rd. (Route 67)
Site Description: near garden, 18 m north of gravel road, 97 m west of
route 67
Date Drilled: 7/18/97
Driller and Rig: Charles Dolan, Geoprobe
Geologists Present: David Grimley, Brett Denny
Described By: David Grimley
|
Formation |
Depth (ft.) |
Color |
Texture |
Other |
|
Peoria and Roxana Silts |
0-18 |
|
|
no sample, soft with 1.25 " rod pushed |
|
Sangamon? Ft. Russell ablation till |
18-23 |
|
|
no sample, tougher push with 1.25" rod |
|
Ft. Russell lodgment till |
23-24 |
|
|
no sample, very tough with 1.25" rod |
|
" |
24-28
MS avg. = 15 (n=8) |
5Y 5/1 (grey) |
pebbly loam dm. |
D horizon, uniform till, moderately soft, variety of lithologies in pebbles, including shale, dolomite, quartzite |
|
" |
28-32 |
|
|
no sample, very tough with 1.25" rod |
|
" |
32-36 |
|
|
no sample, very tough with 1.25" rod |
|
bedrock was not yet reached due to time considerations |
||||
Outcrops Examined for 1997 STATEMAP project
* = sample taken ; most but not all have been analyzed for grain size, mineralogy ,and magnetic susceptibility
1f
Location: center, Sec. 9, T6N,R10W Madison County
Elevation: 535' Site Description: road cut on east side of Davis LaneDate Examined: Feb., 1997
Geologist(s): David A. Grimley
*Fort Russell M., loam diamicton, till, brown, mostly leached, CB horizon of Sangamon Geosol
2f
Location: NE,SE,SE,Sec.21,T6N,R10W Madison County
Elevation: 535' Site Description: cut into hill behind house on west side of Pierce RoadDate Examined: Feb., 1997
Geologist(s): David A. Grimley
*Fort Russell M., loam diamicton, till, olive, calcareous, C horizon of Sangamon Geosol
3f
Location: SW,SW,NW,Sec.27,T6N,R10W Madison County
Elevation: 538' Site Description: cut on west side of Pierce RoadDate Examined: Feb., 1997
Geologist(s): David A. Grimley
*Fort Ru