Biology Reference
In-Depth Information
Figure 3.3
Drilling pipe on the Glomar Challenger used in the DSDP (Deep Sea Drilling Proj-
ect). From Hsü 1992. © 1992 Princeton University Press, Princeton, NJ. Used with permis-
sion from the publisher.
sea ice (Stickely et al. 2009; 47.5 Ma) or temporary alpine glaciers, and
others primarily with determining whether the glaciations were bipolar and
synchronous. Some uncertainty continues, so two temperature scales are
given on the curves, one for ice-free and one for glacial conditions. With
new data becoming available on continental ice volume, it is possible now
