APPENDIX 6

 

Stratigraphic Column and Core Descriptions

Site A

 

Depth (ft)                   Description

 

0.0 to 3.6                    Modern soil – no recovery.

 

3.6 to 4.0                    Sand, 2.5Y5/3 (light olive brown), fine-grained.

 

4.0 to 5.0                    Sand, 2.5Y3/2 (very dark grayish brown), fine-grained.

 

5.0 to 7.8                    No recovery, probably sand.

 

7.8 to 8.6                    Sand, 10YR3/2 (very dark grayish brown), fine-grained, shades of gray and black may be varves.

 

8.6 to 8.9                    Sand, 2.5Y5/2 (grayish brown), medium-grain, shades of gray and black may be varves.

 

8.9 to 9.2                    Sand, 2.5Y4/2 (dark grayish brown), fine-grained. shades of gray and black may be varves.

 

9.2 to 10.0                  Sand, 5GY5/1 (greenish gray) clayey, stiff.  Coarse sand at 9.5 ft.  Greenish cast = reduced?

 

10.0 to 11.2               Till, late Wisconsin (Morgan Mbr.?), 5Y5/1 (gray not compact, more oxidized color)

 

11.2 to 14.8               Till, late Wisconsin (Morgan Mbr.?), 5Y4/2 (olive gray), unoxidized, wood chips present.

 

14.8 to 15.0               Till, late Wisconsin (Morgan Mbr.?), 5Y4/2 (olive gray), unoxidized, hard, consolidated.

 

15.0 to 20.0               Till, late Wisconsin (Alden Mbr.?), 5Y4/1 (dark gray), unoxidized, very hard, sand seams present at 17.40 to 17.45 and 18.20 to 18.25 ft.

 

20.0 to 25.0               Till, late Wisconsin (Alden Mbr.?), 5Y4/1(dark gray), unoxidized, very hard, shale chips present.

 

25.0 to 30.0               Till, late Wisconsin (Alden Mbr.?), 5Y4/1(dark gray), unoxidized, very hard.

 

Bottom of borehole @ 30.9 ft.

Preliminary description by Keri Drenner and Bill Simpkins, 6/30/00

Site B

 

Depth (ft)                   Description

 

0.0 to 3.0                    Modern soil – no recovery.

 

3.0 to 4.0                    No recovery, probably sand and coarse gravel.

 

4.0 to 4.7                    soil material, non calcareous

 

4.7 to 5.0                    Sand, 10YR5/3 (brown), clean sand and coarse gravel, few cobbles.  Calcareous

 

5.0 to 10.0                  Till, late Wisconsin (Morgan Mbr.?) 10YR 4/1 (dark gray), calc. unoxidized, upper 1 ft densely fractured, slightly oxidized at 6 ft.

 

10.0 to 15.0               Till, late Wisconsin (Morgan Mbr.?) 10YR4/1 (dark gray), calc., unoxidized, dense, silt layer @ 14.4-14.7’ and some occasional sand layers

 

15.0 to 15.7               No recovery.  Probably sand.

 

15.7 to 20.0               Till, late Wisconsin (Alden Mbr.?), 5Y4/1 (dark gray), unoxidized, sand layer @ 15.8-15.9’.

 

20.0 to 20.5               No recovery.  Probably sand.

 

20.5 to 25.0               Till, late Wisconsin (Alden Mbr.?), 5Y4/1 (dark gray), unoxidized, calc.  Gravel @ 20.5 to21.0 ft; sand @ 22.5 to 22.6 ft; large clast @ 23.3 ft, sand @ 24.2 to 24.5 ft.

 

25.0 to 30.0               Till, late Wisconsin (Alden Mbr.?), 5Y4/1 (dark gray), unoxidized, calc.,  weathered limestone clasts @ 26.1 to 26.5 ft.

 

Bottom of borehole @ 30.4 ft.

 

Preliminary description by Keri Drenner and Bill Simpkins, 6/28/00


Site C

 

Depth (ft)                   Description

 

0.0 to 3.3                    Modern soil – no recovery.

 

3.3 to 5.0                    Fill, clayey, 2.5Y3/2 (very dark grayish brown), cobbles @ 5 ft.

 

5.0 to 10.0                  No recovery. Balls of clay on auger. Cobbles @ ~7 ft.

 

10.0 to 13.2               No recovery.  Very soupy, poorly sorted sand @ 10 ft.  Sandy clay.

 

13.2 to 15.0               Sand, 10YR5/1 (gray), coarse, very well sorted.

 

15.0 to 18.5               No recovery.  Poorly and well sorted loose sand alternating on auger.

 

18.5 to 20.0               Sand, 2.5Y3/0 (very dark gray), fine-grained, well-sorted, more

resistant unit.

 

20.0 to 23.7               No recovery.  Well sorted and silty sand alternating on auger. 

 

23.7 to 25.0               Sand, 5Y4/1 (dark gray), well sorted, fine-grained.

 

25.0 to 27.0               Silt (Peoria loess?), 5Y3/1 (very dark gray), organic streaks, wood

chips.

 

27.0 to 30.75             Till, (Sheldon Cr. Mbr.?), unoxidized, dense.

 

Bottom of borehole @ 30.75 ft.

 

Preliminary description by Keri Drenner and Bill Simpkins, 6/28/00


Site D

 

Depth (ft)                   Description

 

0.0 to 3.5                    Modern soil – no recovery.

 

3.0 to 4.3                    No recovery.  Probably sand.

 

4.3 to 5.0                    Sand, 5Y4/1 (dark gray), coarse, poorly sorted, wet.

 

5.0 to 5.35                  No recovery.  Probably sand.

 

5.35 to 10.0               Till, late Wisconsin (Morgan Mbr.?) 5Y4/1 (dark gray), unoxidized, sand seam @ 8.7- to 8.9 ft.

 

10.0 to 10.15             No recovery.  Probably sand.

 

10.15 to 15.0             Till, late Wisconsin (Morgan Mbr.?), 5Y4/1 (dark gray), unoxidized.

 

15.0 to 16.8               No recovery.  Probably sand.

 

16.8 to 20.0               Till, late Wisconsin (Morgan Mbr.?), unoxidized, some sand seams.

 

20.0 to 25.0               No recovery.  Gray sand on auger the entire interval.

 

25.0 to 28.0               Till, late Wisconsin (Morgan Mbr.?), unoxidized.

 

Bottom of borehole @ 28 ft.

 

Preliminary description by Keri Drenner and Bill Simpkins, 6/27/00


Site E

 

Depth (ft)                   Description

 

0.0 to 3.0                    Modern soil – no recovery.

 

3.0 to 3.5                    No recovery.  Probably sand.

 

3.5 to 5.0                    Sand, 2.5Y6/3 (light yellowish brown), fine to medium-grained,

clayey sand @ 4.8 to 5.0 ft.

 

5.0 to 12.9                  No recovery.  Poorly-sorted gray sand on auger.

 

12.9 to 15.0               Gravel with till, very poorly sorted, possible debris flow sediment.

 

15.0 to 18.7               No recovery.  Gray sand, with cobbles @ ~16 to 17 ft.

 

18.7 to 20.0               Sand, 2.5Y5/2 (grayish brown), well-sorted, coarse-grained.  Cleanest sand to date, heaved and locked up core barrel.

 

20.0 to 20.4               No recovery.  Sand, gray, coarse-grained, less well sorted.

 

24.5 to 25.0               Sand, gray, coarse grained.

 

25.0 to 30.1               No recovery.  Sand with till at 26 to 27 ft.

 

Bottom of borehole @ 30.1 ft.

 

Preliminary description by Keri Drenner and Bill Simpkins, 6/27/00


Site F

 

Depth (ft)                   Description

 

0.0 to 3.0                    Modern soil – no recovery.

 

3.0 to 3.8                    No recovery.  Fill sand.

 

3.8 to 3.9                    Black fill sand? calcareous

 

3.9 to 5.0                    Sand (fill?), 5Y4/1 (dark gray) to 5Y2.5/1 (black).

 

5.0 to 9.7                    No recovery.  Mostly sand, some clay from 7 to 10 ft. calc.

 

9.7 to 10.0                  Sand, well sorted, clean.

 

10.0 to 13.2               Sand, fine-grained, runny @ 12.6 to 13.2 ft, calcareous.

 

13.2 to15.0                Till, late Wisconsin (Morgan Mbr.?), 5Y4/1 (dark gray), calc. 

 

15.0 to 18.45             No recovery.  Probably sand.

 

18.45 to 20.0             Till, late Wisconsin (Alden Mbr.?), 5Y4/1 (dark gray), calc., very compact  @ 19.8 to 20 ft.

 

20.0 to 22.0               No recovery.  Probably sand.  Seems to fine upward.

 

22.0 to 25.0               Sand, 10YR5/1 (gray), fine to medium-grained.

 

25.0 to 30.0               Stiff sand and till-like sediment, 5Y5/1 (gray).  Calcareous. Potential debris flow.

 

Bottom of borehole @ 30 ft.

 

Preliminary description by Keri Drenner and Bill Simpkins, 6/29/00


Site G

 

Depth (ft)                   Description

 

0.0 to 3.0                    Gravelly sand, rocky near top.

 

3.0 to 4.6                    No recovery.  Sand.

 

4.6 to 5.0                    Sand.

 

5.0 to 6.9                    No recovery.

 

6.9 to 7.5                    Peat. Compressed and slightly consolidated.

 

7.5 to 10.0                  Sandy clay, 5Y2.5/1 (black).  Gravel layer at bottom.

 

10.0 to 14.0               No recovery.  Poorly sorted sand (2.5Y4/1 black color).

 

14.0 to 15.0               Sand, 5Y2.5/1 (black).

 

15.0 to 20.0               No recovery.  Sand, light gray, runny on augers.

 

20.0 to 25.0               No recovery.  Sand, gray, runny on augers.

 

25.0 to 27.5               Till, late Wisconsin (Morgan Mbr.?), 5Y3/1 (very dark gray), some pebbles.

 

27.5 to 29.75             Shelby tube

 

Bottom of borehole @ 29.75 ft.

 

Description by Keri Drenner and Bill Simpkins, 6/26/00


Site H

 

Depth (ft)                   Description

 

0.0 to 3.0                    Modern soil – no recovery.

 

3.0 to 4.5                    Modern soil.  Sandy loam.

 

4.5 to 5.0                    Sand, very well sorted, 10YR5/3 (brown). Beach sand.

 

5.0 to 8.2                    No recovery.  Sand, gray, coarse.

 

8.2 to 10.0                  Sand, 5Y4/1 (dark gray), coarse-grained with larger cobbles.

 

10.0 to 15.0               No recovery. Sand, gray, medium-grained.

 

15.0 to 17.9               No recovery.  Same as above.

 

17.9 to 20.0               Sand, 5Y5/1 (gray), medium-grained, no gravel

 

20.0 to 30.35             No recovery.  Gray sand, fine to medium grained.  Formation heaved and locked augers at 25 ft.

 

Bottom of borehole @ 30.35 ft.

 

Preliminary description by Keri Drenner and Bill Simpkins, 7/10/00


Site I

 

Depth (ft)                   Description

 

0.0 to 3.0                    Modern soil – no recovery.

 

3.0 to 4.5                    No recovery: Cobble zone ~ 3.5 ft.

 

4.5 to 5.0                    Organic horizon and fine sand and cobbles, 2.5Y2/0 (black).

 

5.0 to 9.5                    No recovery.  Soupy, organic sand on augers.

 

9.5 to 10.0                  Sand, 5Y4/1 (dark gray), medium-grained, well-sorted.

 

10.0 to 11.7               No recovery.  Gray, soupy sand on auger.

 

11.7 to 13.6               Silt (lake sediment), fine organic matter, shells at 13.9 ft.

 

13.6 to 14.4               Silty clay (lake sediment), 5Y5/2 (olive gray).

 

14.4 to 15.0               Sandy silt (lake sediment), 5Y4/1 (dark gray).

 

15.0 to 18.3               Silty sand, gravelly, (lake sediment).

 

18.3 to 18.8               No recovery: Poorly rounded gravel and silty sand.

 

18.8 to 19.3               Sand, organic horizon, wood, roots?

 

19.3 to 20.0               Silty sand, stiff, heaving conditions. 

 

20.0 to 22.5               No recovery.  Probably sand.

 

22.5 to 25.0               Sand, 5Y4/1 (dark gray), fine-grained, well-sorted.

 

25.0 to 27.0               No recovery.  Sand, but pulled till from auger.

 

27 to 30.3                   Silty sand, stiff with some clean sand at bottom.  Possible till at very bottom 0.5 ft.

 

Bottom of borehole @ 30.3 ft.

 

Preliminary description by Keri Drenner and Bill Simpkins, 7/11/00


Site J

 

Depth (ft)                   Description

 

0.0 to 2.9                    Modern soil – no recovery.

 

2.9 to 3.2                    Soil material, non-calcareous

 

3.2 to 4.6                    Sand, 2.5Y5/2 (grayish brown), fine-grained, well sorted, calc.

 

4.6 to 5.0                    Clayey sand, poorly sorted.

 

5.0 to 7.5                    No recovery.  Probably sand.

 

7.5 to 8.6                    Grayish sand, medium-grained, poorly sorted with clay.

 

8.6 to 8.9                    Clayey sand, 5GY4/1 (dark greenish gray), stiff

 

8.9 to 9.9                    Clayey sand, 2.5Y4/3 (olive brown), oxidized, mixed with silt (possible loess)?

 

9.9 to 10.0                  Silt (loess), calcareous, 2.5Y5/2.

 

10.0 to 11.3               No recovery.  Probably sand.

 

11.3 to 13.1               Silty sand, oxidized.

 

13.1 to 14.2               Mix of oxidized/unoxidized silty sand.

 

14.2 to 14.9               Clayey sand, oxidized, stiff, calcareous, 2.5Y5/2

 

14.9 to 15.0               Laminated silt, ½ oxidized, ½ unoxidized.

 

15.0 to 16.7               No recovery.  Probably sand.

 

16.7 to 17.4               Sand, 2.5Y4/2 (dark grayish brown), fine-grained.

 

17.4 to 18.1               Silt , some sand (loess?), 5Y4/1 (dark gray).

 

18.1 to 19.6               Silt, same as above, no sand, 5Y4/1, calcareous.

 

19.6 to 19.9               Sand, fine-grained, poorly sorted.

 

19.9 to 20.0               Silt.

 

20.0 to 21.7               No recovery.  Probably sand.

 

21.7 to 22.6               Sand, fine-grained, runny.

 

22.6 to 23.1               Silt/fine sand mixture.

 

23.1 to 24.0               Silt, 2.5Y4/2 (dark grayish brown), some fine sand.

 

24.0 to 25.0               Silt, 2.5Y3/2 (very dark grayish brown), calcareous.

 

25.0 to 25.6               Till, 5Y5/3 (olive) to 5Y4/1 (dark gray), very hard, very dense.

 

25.6 to 31.2               Till, 5Y4/1 (dark gray), very hard, very dense, calcareous, resembles Pre-Illinoian till.  Could be Sheldon Creek till.  Rig would not push Shelby tube into it.

 

Bottom of borehole @ 31.2 ft.

 

Preliminary description by Keri Drenner and Bill Simpkins, 6/29/00


Site K

 

Depth (ft)                   Description

 

0.0 to 1.0                    Modern soil – no recovery.

 

1.0 to 2.0                    A horizon, 5Y2.5/1 (black), organic (histosol).

 

2.0 to 2.9                    A to B horizon, 5Y2.5/1 (black), less organic.

 

2.9 to 3.8                    Silty organic horizon, 2.5Y5/3 (light olive brown) to 5Y2.5/1 (black).

 

3.8 to 4.7                    Clay, 2.5Y6/2 (light brownish gray), gravelly (colluvium?).

 

4.7 to 5.0                    Till, late Wisconsin (Morgan Mbr.?), oxidized, 2.5Y5/4 (light olive brown).

 

5.0 to 8.9                    No recovery.  Probably sand.

 

8.9 to 10.0                  Till, late Wisconsin (Morgan Mbr.?), oxidized. 2.5Y5/4 (light olive brown).

 

10.0 to 13.3               No recovery.  Probably sand.

 

13.3 to 15.0               Till, late Wisconsin (Morgan Mbr?), unoxidized.

 

15.0 to 29.9               Till late Wisconsin (Alden Mbr?), 5Y4/1 (dark gray), unoxidized, very hard.

 

Bottom of borehole @ 29.9 ft.

 

Preliminary description by Keri Drenner and Bill Simpkins, 7/10/00