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Louisiana Geology

Fisk, H.N., 1944, Geological investigation of the alluvial valley of the lower Mississippi River: U.S. Department of the Army, Mississippi River Commission, 78p.

These are high resolution scans of the maps in this volume. The files are in PDF format and are up to 30 megs. While some of the conclusions of the report are outdated, the maps are beautiful and illustrate the dynamic history of the Mississippi River. The most striking are the 15 sheets that make up Plate 22, the meander maps of the Mississippi from Cape Girardeau to Donaldsonville.

Plate #

Plate Title

Location in Book

1

Physiographic map of Central Gulf Coastal Plain

4

2

Development of alluvial surface (2 sheets) 1, 2

In pocket

3

Mississippi River entrenched valley system (2 sheets) 1, 2

In pocket

4

Transvalley cross section (Harrisonburg, La. To Natchez, Miss.)

16

5

Transvalley cross section (Bastrop, La. To Yazoo City, Miss.) 3 sheets 1, 2, 3

16

6

Transvalley cross section (Pine Bluff, Ark. To Memphis, Tenn.) 3 sheets 1, 2, 3

16

7

Transvalley cross section (Poplar Bluff, Mo. To Wickliffe, Ky.) 2 sheets 1, 2

16

8

Transvalley cross sections of tributary valleys (2 sheets) 1, 2

16

9

Transvalley cross sections of alluvial valley and principal tributaries

16

10

Geological Map of the floor of the entrenched valley system (2 sheets) 1, 2

In pocket

11

Bedrock profiles along major entrenched valleys

16

12

Contour map showing top of graveliferous deposits in the alluvial valley (2 sheets) 1, 2

In pocket

13

Distribution of floodplain sediments

20

14

Clay plugs within the Mississippi River meander belt

20

15

Stream courses in alluvial valley (4 sheets) 1, 2, 3, 4

In pocket

16

Braided topography in the Western Lowland

22

17

Major faults and structural depressions I the deltaic plain

34

18

Valley slope profiles

38

19

Valley slopes during various stages of development of alluvial plain

40

20

Diversion of Ohio River from Cache Lowland

40

21

Mississippi River Sources at head of alluvial valley

40

22

Ancient courses within the Mississippi River meander belt (15 sheets)
1, 2, 3, 4, 5, 6. 7, 8, 9. 10. 11. 12. 13. 14. 15

In pocket

23

Profiles of selected Mississippi River courses within the meander belt

42

24

Bank Caving near Mayersville, Miss.

50

25

Distribution of alluvium and older bedrock along the Mississippi River channel

52

26

Cross sections of Quaternary deposits

64

27

West-east cross sections of Central Gulf Coastal Plain along lat. 35°N and 36°N

64

28

West-east cross sections of Central Gulf Coastal Plain along lat. 33°N and 34°N

64

29

West-east cross section of Central Gulf Coastal Plain along lat. 32°N

64

30

West-east cross section of Central Gulf Coastal Plain along lat. 31°N

64

31

West-east cross section of Central Gulf Coastal Plain along lat. 30°N

64

32

West-east cross section of Central Gulf Coastal Plain from Cameron, La. to Breton Sound

64

33

North-south cross section of Central Gulf Coastal Plain from Cairo to the Gulf of Mexico

64

 

 

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