dos. PROXY Records
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.
Succession stratigraphy out-of inactive continental margins also have track of local sea-level over the past 50 Ma plus expanded timescales [ Vail ainsi que al., 1977 ; Haq mais aussi al., 1987 ; Miller et al., 2005a ; Kominz ainsi que al., 2008 ]. Depositional sequences bounded of the unconformities (attacks of nondeposition and/or counters of erosion) let you know alterations in local sea level. [1998 , 2005a] , Kominz ainsi que al. , and Browning ainsi que al. ).
By accurately relationships sequences and you will inferring for the past liquids breadth during depositional phases away from lithofacies and you will biofacies models, a quantitative imagine from sea-level as a result of date is going to be composed (to possess the full conversation get a hold of Miller ainsi que al
Vail ainsi que al. set-up a method for inferring in the world sea-level from the correlating sequences out-of multiple depositional basins. Continue reading “2.step one. Series Stratigraphy: A sea Top Proxy”