Figure F8. Average sedimentation rates in the tropical Pacific for the late Eocene time slice (m/m.y., 34–40 Ma) (after Moore et al., 2004). Sites are rotated to their estimated paleoposition at 37 Ma using a fixed-hotspot model for Pacific plate motion. Because the sediments primarily consist of tests of plankton, the sedimentation rates are a semiquantitative measure of paleoproductivity. Note that a well-organized zone of productivity exists at ~10°N in the late Eocene. Modern productivity in the region is lower and more poorly organized, as is shown in Figure F7, . Blue squares = ages estimated by carbonate microfossils, green inverted triangles = ages estimated by carbonate and siliceous microfossils, red triangles = ages estimated by siliceous microfossils, brown circles = sparse microfossils or clay. The red dashed line marks the approximate center of the equatorial divergence, or geographic equator.

Figure F8. Average sedimentation rates in the tropical Pacific for the late Eocene time slice (m/m.y., 34–40 Ma) (after Moore et al., 2004). Sites are rotated to their estimated paleoposition at 37 Ma using a fixed-hotspot model for Pacific plate motion. Because the sediments primarily consist of tests of plankton, the sedimentation rates are a semiquantitative measure of paleoproductivity. Note that a well-organized zone of productivity exists at ~10°N in the late Eocene. Modern productivity in the region is lower and more poorly organized, as is shown in Figure F7. Blue squares = ages estimated by carbonate microfossils, green inverted triangles = ages estimated by carbonate and siliceous microfossils, red triangles = ages estimated by siliceous microfossils, brown circles = sparse microfossils or clay. The red dashed line marks the approximate center of the equatorial divergence, or geographic equator.