4000
4000
3600
3200
2800
2500
2500
2500
2300
2050
1800
1600
1600
1400
1200
1000
1000
850
635
541
541
541
541
541
529
521
521
514
509
509
504.5
500.5
497
497
494
489.5
485.4
485.4
485.4
477.7
470
470
467.3
458.4
458.4
453
445.2
443.4
443.4
443.4
440.8
438.5
433.4
433.4
430.5
427.4
427.4
425.6
423
423
419.2
419.2
419.2
410.8
407.6
393.3
393.3
387.7
382.7
382.7
372.2
358.9
358.9
358.9
346.7
330.9
323.2
323.2
315.2
307
303.7
298.9
298.9
298.9
295.5
290.1
279.3
272.3
272.3
268.8
265.1
259.9
259.9
254.2
252.2
252.2
252.2
252.2
251.2
247.2
247.2
242
237
237
228
208.5
201.3
201.3
201.3
199.3
190.8
182.7
174.1
174.1
170.3
168.3
166.1
163.5
163.5
157.3
152.1
145
145
145
139.8
132.9
129.4
125
113
100.5
100.5
93.9
89.8
86.3
83.6
72.1
66
66
66
66
61.6
59.2
56
56
47.8
41.3
38
33.9
33.9
28.1
23.03
23.03
23.03
20.44
15.97
13.82
11.62
7.246
5.333
5.333
3.6
2.588
2.588
2.588
1.806
0.781
0.126
0.0117
0.0117
0
Geologic Time
Archean
Eoarchean
Paleoarchean
Mesoarchean
Neoarchean
Proterozoic
Paleoproterozoic
Siderian
Rhyacian
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Stage 5
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Stage 10
Ordovician
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Zanclean
Piacenzian
Quaternary
Pleistocene
Gelasian
Calabrian
Middle Pleistocene
Late Pleistocene
Holocene
Holocene
A
E
P
M
N
P
P
S
R
O
S
M
C
E
S
N
T
C
E
P
Pz
Cm
T
F
S
S
S
S
S
S
D
G
F
P
J
S
O
E
T
F
M
D
D
L
S
K
H
S
L
R
A
T
W
S
H
L
G
L
P
P
D
E
L
P
E
M
E
G
L
F
F
C
M
T
V
S
P
B
M
K
G
P
C
A
S
A
K
G
R
W
C
L
W
C
Mz
Tr
E
I
O
M
A
L
L
C
N
R
J
E
H
S
P
T
M
A
B
B
C
L
O
K
T
K
E
B
V
H
B
A
A
L
C
T
C
S
C
M
Cz
Pg
P
D
S
T
E
Y
L
B
P
O
R
C
Ng
M
A
B
L
S
T
M
P
Z
P
Q
P
G
C
M
L
H
H