The generally warm and ice-free conditions of the Eocene epoch rapidly declined to the cold and glaciated state of the Oligocene epoch. Geochemical evidence from deep-sea sediments resolves in detail the climatic events surrounding this transition.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/tale-two-climates
[2] http://admin.indiaenvironmentportal.org.in/category/author/katharina-billups
[3] http://admin.indiaenvironmentportal.org.in/category/journal/nature-geoscience
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/oceans-and-seas
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sedimentation
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-science
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/antarctica