2.step 1. Succession Stratigraphy: A-sea Peak Proxy
dos. PROXY Suggestions
Long-duration (10 7 years) records of sea level, ice volume, and temperature over the past 50 Ma are limited to ocean sediment deposits. Although other proxy records exist (e.g., from isotope analysis of fossil tooth enamel [ Zanazzi et al., 2007 ] or sediment records from an incised river valley [ Peters et al., 2010 ]), these are of a too short duration to be included in this review. Long-term (10 7 years) records are presently limited to sequence stratigraphy records of sea level [ Miller et al., 2005a ], Mg/Ca proxy records of DST [ Lear et al., 2000 ; Billups and Schrag, 2003 ], and records of oxygen isotopes (? 18 O), which are a mixed climate signal [ Zachos et al., 2001 ]. Other proxies, such as the tetraether index (TEX86) and the alkenone unsaturation index (U k? 37), have been used to create intermediate-duration (10 6 years) SST records.
Series stratigraphy away from couch potato continental margins provide tabs on local sea level over the past 50 Ma and also longer timescales [ Vail mais aussi al., 1977 ; Haq mais aussi al., 1987 ; Miller ainsi que al., 2005a ; Kominz mais aussi al., 2008 ].