Roadside Geology of Louisiana
by Darwin Spearing
Roadside Geology of Louisiana
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| I. Preface |
ix
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| II. Acknowledgments |
xiii
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| III. Geologic Overview |
1
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| A) Geologic Time |
1
|
| B) Geologic History of Louisiana |
5
|
| C) Structure Below |
17
|
| D) Salt Domes |
19
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| E) Oil and Gas |
25
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| F) Minerals |
30
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| G) Rivers in Motion |
31
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| H) Dynamic Deltas |
34
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| I) Mississippi Fan |
39
|
| J) How the Mississippi River Grew |
41
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| K) Wetlands Loss |
44
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| IV. Southeastern Louisiana Uneasy Rivers, Marshes and Deltas |
49
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| A) Atchafalaya Basin |
50
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| B) New Orleans |
57
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| C) Pontchartrain Causeway and Lake Pontchartrain |
60
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| D) Interstate 10: Baton Rouge-Lafayette |
64
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| E) Interstate 10: New Orleans-Baton Rouge |
67
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| F) Interstate 10: New Orleans-Slidell-Mississippi |
69
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| G) Interstate 55: Hammond (I-12)-Interstate 10-Lake Maurepas |
69
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| H) US 90: Lafayette-Morgan City |
70
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| I) US 90: Morgan City-Houma |
73
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| J) US 90: New Orleans-Des Allemands-Raceland-Houma |
75
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| K) Louisiana 1: Port Allen-Donaldsonville-Thibodaux-Raceland |
76
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| L) Louisiana 1: Raceland-Golden Meadow- Grand Isle |
78
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| M) Louisiana 14, Louisiana 329: Avery Island |
83
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| N) Louisiana 23: New Orleans-Venice-Tidewater |
85
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| O) Louisiana 83, Louisiana 319: Weeks Island-Cypremort State Park-Cypremort Point |
92
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| P) Louisiana 675: Jefferson Island |
94
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| V. Eastern Louisiana Red Hills Above Pontchartrain |
97
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| A) Interstate 12: Baton Rouge-Hammond-Slidell |
101
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| B) Interstate 55: Hammond-Kentwood Quarry-Mississippi |
103
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| C) Interstate 59: Mississippi-Slidell |
107
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| D) US 61: Baton Rouge-St. Francisville-Mississippi |
107
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| E) Louisiana 21, Louisiana 41: Mississippi- Bogalusa-Interstate 59 |
109
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| VI. Southwestern Louisiana Marsh to the Sea |
111
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| A) Interstate 10: Lafayette-Jennings-Lake Charles-Sulphur-Texas |
115
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| B) Louisiana 27: Sulphur-Hackberry-Holly Beach |
121
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| C) Louisiana 27/14: Lake Charles-Oak Grove |
124
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| D) Louisiana 82: Sabine Pass-Holly Beach-Cameron |
126
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| E) Louisiana 82, US167: Cameron-Pecan Island-Abbeville-Lafayette |
129
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| VII. Central Louisiana Great Rocks and Great Rivers |
133
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| A) Interstate 49: Alexandria-Opelousas-Lafayette |
135
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| B) Interstate 49: Alexandria-Natchitoches |
136
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| C) US 84: Tullos-Jena-Archie |
140
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| D) US 84: Vidalia-Ferriday-Archie |
141
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| E) US 84, Louisiana 6: Natchitoches-Winnfield Salt Dome-Winnfield |
142
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| F) US 84, Louisiana 34: Winnfield-Tullos |
147
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| G) US 165: Alexandria-Georgetown-Tullos |
147
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| H) US 165: Alexandria-Oakdale-Iowa (I-10) |
148
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| I) US 167: Alexandria-Winnfield |
149
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| J) US 171: Lake Charles-DeRidder-Leesville-Many |
150
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| K) Louisiana 378: Sam Houston Jones State Park |
155
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| L) Louisiana 1: Baton Rouge-Simmesport-Marksville-Alexandria |
157
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| M) Louisiana 6: Sabine River-Many-Natchitoches |
161
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| N) Louisiana 8/28: Alexandria-Leesville-Sabine River |
162
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| O) Louisiana 15: Ferriday-Three Rivers Area-Old River Control Structures-Lettsworth |
163
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| P) Louisiana 28: Alexandria-Walters-US 84 Junction |
168
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| Q) Louisiana 107: Alexandria-Moncla Gap-Marksville |
169
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| R) Louisiana 129: Features of the Floodplain |
172
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| VIII. Northern Louisiana Oldest Rocks, Highest Hills |
177
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| A) Interstate 20: Texas-Shreveport-Monroe-Vicksburg |
179
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| B) Interstate 49: Shreveport-Natchitoches |
183
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| C) US 65: Tallulah-Ferriday |
188
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| D) US 65: Tallulah-Lake Providence-Arkansas |
189
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| E) US 79: Minden-Homer-Haynesville-Arkansas |
191
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| F) US 165: Monroe-Bastrop-Arkansas |
192
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| G) US 165: Monroe-Columbia-Tullos |
193
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| H) US 167: Ruston-Dubach-Bernice-Arkansas |
194
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| I) US 167: Ruston-Jonesboro-Winnfield |
196
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| J) US 171: Shreveport-Mansfield-Many |
196
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| K) Louisiana 1: Shreveport-Oil City Arkansas |
197
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| L) Louisiana 3: Shreveport-Benton-Plain Dealing-Arkansas |
199
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| M) Louisiana 7: Dixie Inn-Cotton Valley-Springhill-Arkansas |
199
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| N) Louisiana 15: Monroe-Winnsboro-Sicily Island-Clayton |
200
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| O) Louisiana 17, Louisiana 134, Louisiana 577: Delhi-Poverty Point State Commemorative Area |
201
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| IX. Hurricanes Katrina and Rita, 2005 |
203
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| X. Glossary |
205
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| XI. Credits |
210
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| XII. References |
211
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| XIII. Maps and Information |
215
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| XIV. Index |
217
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| XV. About the Author |
225
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