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The sedimentary objectives at Site 1140 were to determine sequence facies , to define the ages of seismic sequence boundaries , to estimate the duration of possible subaerial and shallow-marine environments , to obtain minimum estimates for basement age , and to determine the paleoceanographic history of this moderate latitude site . My dissertation research in the laboratory of Dr. Carmela Abraham , focuses on understanding molecular mechanisms of brain aging which we have demonstrated occur largely in the white matter of the brain , specifically in the insulation of nerve endings , a dynamic structure called myelin . In addition , an operational mission implies that more instruments will be built ( and possibly improved upon ) for future missions as spacecraft age and are replaced . Social security benefit cuts ( either directly or through further delays in retirement ages ) are one option . Sedimentary objectives at Site 1137 were to determine sequence facies , to define the ages of seismic sequence boundaries , to estimate the duration of possible subaerial and shallow marine environments , to obtain minimum estimates for basement age , and to determine the paleoceanographic history of this high-latitude site . Tree-ring reconstructions of forest age structure and fire history , however , can identify new elements in this story .