SEISMIC STRATIGRAPHY OF THE CENTRAL SCOTIAN RISE - A RECORD OF CONTINENTAL-MARGIN GLACIATION

3.5-kHz profiles from low channel levees on the Scotian Rise show tran sparent Holocene acoustic facies overlying stratified glacial facies, dated by Carbon-14 in cores. Corresponding acoustic facies in seismic records are correlated with glaciations by ''counting back'' from the present sea floor using sedimentation rates from Carbon-14 dating and biostratigraphy from wells as a guide. The regional thickness and char acter of the seismic units correlate with the duration and intensity o f glacial periods inferred from the global isotopic record. Changes in glacial supply to the continental margin are interpreted using this c hronology, which shows stage 12 as the first widespread erosional glac ial event.