|
ERA |
PERIOD |
E
P
O
C
H |
A
G
E |
T
I
M
E |
STAGE/GROUP |
STRATIGRAPHIC
UNIT (INDUSTRY) |
KEY
FORAMS |
|
C
E
N
O
Z
O
I
C
|
Q
U
A
T
E
R
N
A
R
Y |
H
O
L
O
C
E
N
E |
H
O
L
O
C
E
N
E |
P
R
E
S
E
N
T
T
O
12K
YBP |
HOLOCENE |
ALLUVIUM |
NA |
|
P
L
E
I
S
T
O
C
E
N
E |
C
A
L
A
B
R
I
A
N |
12K
YBP
TO
2.8
MM
YBP |
WISCONSONIAN
ILLINOIAN
KANSAN
NEBRASKAN |
(GLACIAL
DEPOSITS)
GULFPORT/LOESS
BILOXI/PRAIRIE
PRE-LOESS |
Sangamon
Cris S
Lenticulina
1 |
|
T
E
R
T
I
A
R
Y |
N
E
O
G
E
N
E |
P
L
I
O
C
E
N
E |
|
2.8
MM
YBP
TO
5.3
MM
YBP |
CITRONELLE |
CITRONELLE |
Buliminella
1
Tex X |
|
M
I
O
C
E
N
E |
|
5.3
MM
YBP
TO
25
MM
YBP |
FLEMING |
LATE
|
Rob E
Big A
Cris K
Disc 12
Tex L |
|
MIDDLE |
Big 2
Tex W
Big Hum
Cris I
Cib Op
Amph B
Rob L
Camerina 1 |
|
EARLY |
Cris A
Marg A
Siphonina D
Planulina P
Lenticulina H
Cris R |
|
P
A
L
E
O
G
E
N
E |
O
L
I
G
O
C
E
N
E |
|
25
MM
YBP
TO
38
MM
YBP |
CATAHOULA |
ANAHUAC
|
Rob A
Disc G
Het
Cib Jeff
Bol Perc
Marg I
Marg Vag
Marg Howei
Text 14
Camerina A
Miogyp A
Cib Hazz |
|
FRIO |
Marg Tex
Bol Mex
Nonion Struma
Nodosaria B
Text S
Anomalina B |
|
VICKSBURG |
VICKSBURG |
Text Warreni
Text Miss
Cib Pip |
|
E
O
C
E
N
E |
|
38
MM
YBP
TO
55
MM
YBP |
JACKSON |
YAZOO
MOODYS BRANCH |
Marg C
Text H
Text D
Camerina MB |
|
CLAIBORNE |
YEGUA/COCKFIELD
COOK MOUNTAIN
SPARTA
CANE RIVER
TALLAHATTA |
D Yeguaensis
E Yeguaensis
C Exima
Operc S
Anomalina B
Text S
Cyclammina C
Disc A
Bifarina B |
|
WILCOX |
CARRIZO
SABINETOWN
PENDLETON
MARTHAVILLE |
Disc Wash
C Midwayensis |
|
P
A
L
E
O
C
E
N
E |
|
55
MM
YBP
TO
65
MM
YBP |
|
MIDWAY |
LOGANSPORT
PORTERS CREEK |
Vag Rob
Vag Long
Vag Midwayana
Poly Cushmani
Vag G
Rob Pseudo |
|
2nd Greatest Mass Extinction on Record |
|
M
E
S
O
Z
O
I
C
|
C
R
E
T
A
C
E
O
U
S |
U
P
P
E
R |
|
S
E
N
O
N
I
A
N |
65
MM
YBP
TO
89
MM
YBP |
MAASTRICHTIAN
CAMPANIAN
SANTONIAN
CONIACIAN
TURONIAN
CENOMANIAN |
SELMA/NAVARRO
EUTAW/OZAN
EAGLEFORD
UPPER TUSC
MARINE SHALE
LOWER TUSC |
|
|
L
O
W
E
R |
|
N
E
O
C
O
M
A
N
I
A
N |
89
MM
YBP
TO
144
MM
YBP |
ALBIAN
APTIAN
BARREMIAN
HAUTERIVIAN
VALANGINIAN
BERRIASIAN |
WASH-FRED
PALUXY
MOORINGSPORT
FERRY LAKE
RODESSA
JAMES LIME
SLIGO
HOSSTON |
|
|
J
U
R
A
S
S
I
C |
U
P
P
E
R |
|
L
I
A
S |
144
MM
YBP
TO
154
MM
YBP |
TITHONIAN
KIMMERIDGIAN
OXFORDIAN |
COTTON VALLEY
HAYNESVILLE
BUCKNER
SMACKOVER
NORPHLET |
|
|
M
I
D
D
L
E |
|
D
O
G
G
E
R |
154
MM
YBP
TO
180
MM
YBP |
CALLOVIAN
BATHONIAN
BAJOCIAN
AALENIAN |
LOUANN |
|
|
L
O
W
E
R |
|
M
A
L
M |
180
MM
YBP
TO
208
MM
YBP |
TOARCIAN
PLIENSBACHIAN
SINEMURIAN
HETTANGIAN |
WERNER |
|
|
T
R
I
A
S
S
I
C |
|
|
|
208
MM
YBP
TO
245
MM
YBP |
RHAETIAN
NORIAN
CARNIAN
LADINIAN
ANISIAN
OLENEKIAN
INDUAN |
EAGLE MILLS |
|
|
Greatest Mass Extinction on Record |
|
P
A
L
E
O
Z
O
I
C
|
P
E
R
M
I
A
N |
|
|
|
245
MM
YBP
TO
290
MM
YBP |
TATARIAN
KAZANIAN
KUNGURIAN
ARTINSKIAN
SAKMARIAN
ASSELIAN |
(ABSENT OR NOT
IDENTIFIED TO
DATE IN MAFLA
AREA EXCEPT
POSSIBLY
CERTAIN
METAMORPHIC
ROCKS IN THE
CORE OF THE
WIGGINS
ANTICLINE) |
|
|
P
E
N
N
S
Y
L
V
A
N
I
A
N |
C
A
R
B
O
N
I
F
E
R
O
U
S |
|
|
290
MM
YBP
TO
325
MM
YBP |
GZELIAN
KASIMOVIAN
MOSCOVIAN
BASKIRIAN |
POTTSVILLE |
|
|
M
I
S
S
I
S
S
I
P
P
I
A
N |
|
|
325
MM
YBP
TO
360
MM
YBP |
SEPUKHOVIAN
VISEAN
TOURNAISIAN |
MILLERELLA
CARTER
SANDERS
BANGOR
EVANS
LEWIS
IOWA/TUSCUMBIA
FT. PAYNE |
|
|
D
E
V
O
N
I
A
N |
|
|
|
360
MM
YBP
TO
410
MM
YBP |
FAMMENIAN
FRASNIAN
GIVETIAN
EIFELIAN
EMSIAN
PRAGHIAN
LOCKHOVIAN |
CHATTANOOGA
SHALE
DEVONIAN
LIMESTONE
DEVONIAN
CHERT |
|
|
S
I
L
U
R
I
A
N |
|
|
|
410
MM
YBP
TO
440
MM
YBP |
PRIDOLIAN
LUDLOVIAN
|
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