Alabama Landscapes
The Coastal Plain
Table 1. Mesozoic-Recent Rocks of the Eastern Gulf Coastal Plain
|
System |
Series |
Group/Formation |
Rock types (most common first) |
Physiographic District |
|
|
Tertiary |
Pliocene |
Citronelle Formation |
sand, clay, gravel |
SPH* |
|
|
Miocene |
Miocene Series |
sand, gravel clay |
|||
|
Oligocene |
Vicksburg Group |
sand clay limestone (Marianna LS) |
|
DP east |
|
|
Eocene |
Jackson Group |
clay sand limestone |
|
||
|
Claiborne Group |
sand clay silt Tallahatta claystone clay |
LH west
|
SRH east |
||
|
Paleocene |
Wilcox Group |
sand clay lignite |
SRH |
||
|
Midway Group |
marl sand limestone |
||||
|
Cretaceous |
|
Selma Group |
E-C** sand (Providence) C-W chalk (Prairie Bluff) sand, clay, sandstone (Ripley, Cusetta sand)
C-W chalk, marl, (Demopolis) E sand (Blufftown C-W chalk, marl, (Mooreville)
|
CH |
|
|
BP |
|||||
|
Eutaw Formation |
sand, clay, oyster beds, sandstone |
FLH |
|||
|
Tuscaloosa Group |
sand, gravel |
||||
*BP: Black Prairie, CH: Chunnenuggee Hills, DP: Dougherty Plain, FLH: Fall Line Hills, DPH: Southern Pine Hills, SRH: Southern Red Hills
** E-C: east-central, C-W: central-west