Georgia
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The origin of the Gulf of Mexico is not well understood. It appears that it developed during the Early to Mid Mesozoic as Modern North America separated from the supercontinent of Pangea. Structurally it seems to be a deep basin that has partially formed by depression of the same Permian and Triassic beds exposed in at the Western edge of the great plains in Texas, Oklahoma, Kansas, and New Mexico. Its Southern portion is a deep sea bottom formed as South America moved away to the South and later mostly closed off by material moved in from the West by plate tectonics. At it's deepest point, the Gulf of Mexico is more than four kilometers deep.
Although Jurassic beds are found subsurface in the Western Gulf, they are rarely, if ever, exposed. On the surface Lower Cretaceous through modern sediments ring the Gulf with the older sediments found inland and more recent sediments laid down in belts as one approaches the coast. Cretaceous sediments are found up the Mississippi valley as far North as Southern Illinois. Much more extensive deposits associated with a mid-Cretaceous sea that ran from the Gulf to the Arctic are found further West and are covered in the discussion of the Mid-Continent Sea Terrane.
I have included Georgia in both the GULF and ATLANTIC Margin Terranes. Gerogia includes sequences using both GULF and ATLANTIC terminology. On the West, Texas includes large areas of Cretaceous rock that merges cleanly into GULF formations on the East. But further to the West, the Cretaceous rocks become more similar to those of the MID-CONTINENT Terrane.
| Age | Formation |
|---|---|
| Pleistocene | See Recent |
| Miocene | Altamaha-Miccosukee |
| Miocene | Chatahoochee |
| Oligocene | Suwanee |
| Oligocene | Irwinton_barnwell-Glendon |
| Oligocene | Irwinton_barnwell-Marianna |
| Eocene | Irwinton_barnwell-Ocala Limestone-Cooper-Sandersville |
| Eocene | Irwinton_barnwell-Ocala Limestone-Twiggs Clay |
| Eocene | Irwinton_barnwell-Ocala Limestone-Tivola |
| Eocene | Irwinton_barnwell Sand-Ocala Limestone-Clinchfield |
| Eocene | Lisbon-McBean-Claiborne |
| Eocene | Tallahatta |
| Eocene | Tuscahoma |
| Eocene | Hatchitigbee |
| Eocene | Nanfalia |
| Paleocene | Huber |
| Paleocene | Porters Creek Clay |
| Paleocene | Clayton |
| Cretaceous,Upper | Providence |
| Cretaceous,Upper | Ripley |
| Cretaceous,Upper | Cusseta sand |
| Cretaceous,Upper | Bluffton |
| Cretaceous,Upper | Eutaw |
| Cretaceous,Upper | Tuscaloosa |
| Age | Formation |
|---|---|
| Pleistocene | See Recent |
| Pliocene | Citronelle |
| Miocene | Catahoula |
| Miocene | Paynes Hammock |
| Oligocene | Chickasawhay |
| Oligocene | Byram |
| Oligocene | Marianna |
| Oligocene | Red Bluff-Bumpnose |
| Eocene | Yazoo |
| Eocene | Moodys Branch |
| Eocene | Gosport |
| Eocene | Lisbon |
| Eocene | Tallahatta |
| Eocene | Hatchitigbee |
| Eocene | Tuscahoma |
| Eocene | Nanfalia |
| Paleocene | Naheola |
| Paleocene | Porters Creek Clay |
| Paleocene | Clayton |
| Cretaceous,Upper | Prairie Bluff Chalk |
| Cretaceous,Upper | Providence |
| Cretaceous,Upper | Ripley |
| Cretaceous,Upper | Demopolis-Cusseta Sand |
| Cretaceous,Upper | Mooreville |
| Cretaceous,Upper | Bluffton |
| Cretaceous,Upper | Eutaw |
| Cretaceous,Upper | Tuscaloosa |
| Age | Formation |
|---|---|
| Pleistocene | See Recent |
| Pleistocene | Prairie |
| Pleistocene | Montgomery |
| Pleistocene | Bentley |
| Pliocene | Citronelle |
| Miocene | Pascagoula |
| Miocene | Hattiesburg |
| Miocene | Catahoula |
| Miocene | Paynes Hammock |
| Oligocene | Chickasawhay |
| Oligocene | Byram |
| Oligocene | Mint Spring |
| Oligocene | Forest Hill Sand-Red Bluff Clay |
| Eocene | Yazoo |
| Eocene | Moodys Branch |
| Eocene | Cook Mt(Cockfield) |
| Eocene | Cook Mt(Gordon Creek Shale) |
| Eocene | Cook Mt(Potterchitto) |
| Eocene | Cook Mt(Archusa marl) |
| Eocene | Claiborne(Kosciusko) |
| Eocene | Claiborne(Zilpha Clay) |
| Eocene | Claiborne(Winona Sand) |
| Eocene | Claiborne(Tallahatta) |
| Eocene | Wilcox(Hatchitigbee) |
| Eocene | Wilcox(Tuscahoma) |
| Eocene | Wilcox(Nanfalia |) |
| Paleocene | Betheden-Naheola |
| Paleocene | Mathews Landing |
| Paleocene | Porters Creek Clay |
| Paleocene | Clayton |
| Cretaceous,Upper | Owl Creek Marl-Prairie Bluff Chalk |
| Cretaceous,Upper | Selma-Ripley |
| Cretaceous,Upper | Selma-Demopolis |
| Cretaceous,Upper | Coffee Sand-Mooreville |
| Cretaceous,Upper | McShan-Eutaw |
| Cretaceous,Upper | Tuscaloosa |
| Age | Formation |
|---|---|
| Pleistocene | See Recent |
| Eocene | Jackson |
| Eocene | Claiborne |
| Eocene | Wilcox |
| Paleocene | Midway(Porters Creek Shale) |
| Paleocene | Midway(Clayton) |
| Cretaceous,Upper | Navarro(Arkadelphia Marl) |
| Cretaceous,Upper | Navarro(Nacatoch Sand) |
| Cretaceous,Upper | Navarro(Saratoga Chalk) |
| Cretaceous,Upper | Taylor(Marlbrook Marl) |
| Cretaceous,Upper | Taylor(Annona Chalk) |
| Cretaceous,Upper | Taylor(Ozan) |
| Cretaceous,Upper | Taylor(Brownstown Marl) |
| Cretaceous,Upper | Austin(Tokio Sand-Eagle Ford) |
| Cretaceous,Upper | Woodbine |
| Cretaceous,Lower | Washita(Grayson) |
| Cretaceous,Lower | Washita(Mainstreet) |
| Cretaceous,Lower | Washita(Pawpaw Shale) |
| Cretaceous,Lower | Washita(Weno) |
| Cretaceous,Lower | Washita(Denton) |
| Cretaceous,Lower | Washita(Fort Worth) |
| Cretaceous,Lower | Washita(Duck Creek) |
| Cretaceous,Lower | Washita(Kiamichi) |
| Cretaceous,Lower | Fredricksburg(Goodland) |
| Cretaceous,Lower | Fredricksburg(Paluxy) |
| Cretaceous,Lower | Trinity(Mooringsport Anhydrite) |
| Cretaceous,Lower | Trinity(Ferry Lake Anhydrite) |
| Cretaceous,Lower | Trinity(Rodessa) |
| Cretaceous,Lower | Trinity(Pine Island Shale) |
| Cretaceous,Lower | Trinity(Sligo) |
| Cretaceous,Lower | Coahuila(Hosston) |
| Jurassic | Cotton Valley |
| Jurassic | Bohner |
| Jurassic | Smackover |
| Jurassic-Triassic | Eagle Mills Sandstone |
| Age | Formation |
|---|---|
| Pleistocene | See Recent |
| Eocene | Jackson |
| Eocene | Claiborne |
| Eocene | Wilcox |
| Paleocene | Midway(Porters Creek Clay) |
| Paleocene | Midway(Clayton) |
| Cretaceous,Upper | Navarro(Owl Creek Marl) |
| Cretaceous,Upper | Navarro(McNairy Sand) |
| Cretaceous,Upper | Navarro(Coon Creek) |
| Cretaceous,Upper | Navarro(Demopolis) |
| Cretaceous,Upper | Navarro(Sardis Sand) |
| Cretaceous,Upper | Taylor(Coffee Sand) |
| Cretaceous,Upper | Austin(Eutaw) |
| Cretaceous,Upper | Woodbine(Tuscaloosa) |
| Age | Formation |
|---|---|
| Pleistocene | See Recent |
| Pleistocene | Prairie |
| Pleistocene | Montgomery |
| Pleistocene | Bentley |
| Pliocene? | Williana |
| Miocene | Fleming |
| Miocene | Catahoula |
| Oligocene | Nash Creek Clay-Rosenfeld |
| Oligocene | Sandel Sand |
| Oligocene | Mosely Hill-Byram |
| Oligocene | Glendon |
| Oligocene | Mint Spring |
| Oligocene | Forest Hill Sand |
| Eocene | Danville Landing |
| Eocene | Yazoo |
| Eocene | Moodys Branch |
| Eocene | Claiborne(Cockfield) |
| Eocene | Claiborne(Cook Mountain) |
| Eocene | Claiborne(Sparta Sand) |
| Eocene | Claiborne(Cane River) |
| Eocene | Wilcox(Carrizo Sand) |
| Eocene | Wilcox(Sabinetown) |
| Paleocene | Wilcox(Pendleton) |
| Paleocene | Wilcox(Marthaville) |
| Paleocene | Wilcox(Hall Summit) |
| Paleocene | Wilcox(Logansport) |
| Paleocene | Wilcox(Naborton) |
| Paleocene | Midway(Porters Creek) |
| Paleocene | Midway(Clayton) |
| Age | Formation |
|---|---|
| Pleistocene | See Recent |
| Pleistocene | Deweyville |
| Pleistocene | Beaumont |
| Pleistocene | Lissie - Montgomery |
| Pleistocene | Lissie - Bentley |
| Pleistocene | Willis |
| Pliocene | Citronelle |
| Pliocene | Goliad? |
| Miocene | Lagarto |
| Miocene | Fleming |
| Miocene | Oakville |
| Miocene? | Anahuac |
| Miocene? | Catahoula |
| Miocene? | Frio |
| Oligocene | Whitsett |
| Oligocene? | McElroy(Manning) |
| Oligocene? | McElroy(Wellborn) |
| Eocene? | Caddell-Moodys Branch |
| Eocene | Claiborne(Yegua-Cockfield) |
| Eocene | Claiborne(Laredo-Cook Mountain) |
| Eocene | Claiborne(Laredo-Stone City) |
| Eocene | Claiborne(Laredo-Sparta Sand) |
| Eocene | Claiborne(Mount Selman-Weches) |
| Eocene | Claiborne(Mount Selman-Queens City Sand) |
| Eocene | Claiborne(Mount Selman-Reklaw) |
| Eocene | Wilcox(Carrizo Sand) |
| Eocene | Wilcox(Calvert Bluff-Sabinetown) |
| Eocene | Wilcox(Simsboro Sand-Rockdale) |
| Eocene? | Wilcox(Pendleton) |
| Paleocene | Midway-Wilcox)(Hooper-Seguin) |
| Paleocene | Midway(Wills Point) |
| Paleocene | Midway(Kincaid) |
| Cretaceous,Upper | Navarro(Escondido Shale,-Kemp) |
| Cretaceous,Upper | Navarro(Corsicana) |
| Cretaceous,Upper | Navarro(Olmos-Nacatockt-Bergstrom) |
| Cretaceous,Upper | Taylor(San Miguel-Marlbrook) |
| Cretaceous,Upper | Taylor(Anacocho-Annona-Pecan Gap) |
| Cretaceous,Upper | Taylor(Annona-Wolfe City) |
| Cretaceous,Upper | Taylor(Upson-Ozan) |
| Cretaceous,Upper | Taylor?(Pflugerville ) |
| Cretaceous,Upper | Austin(Gober) |
| Cretaceous,Upper | Austin(Brownstown) |
| Cretaceous,Upper | Austin(Tokio-Blossom) |
| Cretaceous,Upper | Austin(Tokio-Bonham) |
| Cretaceous,Upper | Eagle Ford(Boquelias-South Bosque) |
| Cretaceous,Upper | Eagle Ford(Lake Waco) |
| Cretaceous,Upper | Woodbine(Pepper Shale) |
| Cretaceous,Lower | Washita(Buda) |
| Cretaceous,Lower | Washita(Grayson-Del Rio Clay) |
| Cretaceous,Lower | Washita(Mainstreet) |
| Cretaceous,Lower | Washita(Pawpaw) |
| Cretaceous,Lower | Washita(Weno-Georgetown) |
| Cretaceous,Lower | Washita(Denton) |
| Cretaceous,Lower | Washita(Fort Worth) |
| Cretaceous,Lower | Washita(Duck Creek) |
| Cretaceous,Lower | Washita(Kiamichi) |
| Cretaceous,Lower | Fredricksburg(Salmon Peak) |
| Cretaceous,Lower | Fredricksburg(Salmon Peak-McKnight-Devils River-Goodland-Edwards) |
| Cretaceous,Lower | Fredricksburg(West Hurces-Comanche Peak) |
| Cretaceous,Lower | Fredricksburg(Walnut) |
| Cretaceous,Lower | Trinity(Paluxy-Glen Rose) |
| Cretaceous,Lower | Trinity(Hensel) |
| Jurassic | Schuler |
| Jurassic | Cotton Valley Shale |
| Jurassic | Bohner |
| Jurassic | Haynesville-Bossier Shale |
| Jurassic | Buckner Anhydrite |
| Jurassic | Smackover Limestone |
| Jurassic | Norphlet Mudstone |
| Jurassic | Louann Salt |
| Jurassic | Werner Anhydrite |
| Jurassic-Triassic | Eagle Mills Sandstone |
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https://en.wikipedia.org/wiki/Gulf_of_Mexico
http://mrdata.usgs.gov/geology/state/fips-unit.php?state=MS
[http://web.archive.org/web/20091231184415/http://fossilsoftexas.webs.com/]