90°
120°
180°
150°
-150°
-120°
-90°
-60°
-30°
0°
30°
60°
90°
90°
60°
60°
30°
30°
0°
0°
-30°
-30°
-60°
-60°
-90°
120°
180°
150°
-150°
-120°
170
160
150
140
130
120
110
100
90
80
70
60
-60°
Age of the oceanic crust
Crustal age (millions of years)
180
-90°
50
40
30
20
10
0
Crustal age data are from the National Geophysical Data Center at the National Oceanic and Atmospheric Administration, and was downloaded from
http://www.ngdc.noaa.gov/mgg/ocean_age/ocean_age_2008.html.
The full citation is Müller, R.D., M. Sdrolias, C. Gaina, and W.R. Roest 2008.
Age, spreading rates and spreading symmetry of the world's ocean crust,
Geochem. Geophys. Geosyst., 9, Q04006, doi:10.1029/2007GC001743
Map layout and design by Anne E. Egger, 2011.
-30°
0°
30°
60°
90°
-90°