Architectural
Variation in Confined Channels: Examples from Outcrop and 3D Seismic Data
Thompson, Philip1, Benjamin
Kneller1, Mason Dykstra2 (1) University of Aberdeen,
Aberdeen, United Kingdom (2) University of California, Santa Barbara, CA
We present an integrated approach to the
study of confined submarine channels using high-resolution 3D seismic data and
outcrop data. Outcrop studies from the San Fernando Channel Levee System, Baja
California have shown a systematic trend in submarine channel evolution which
is observed at a range of scales from individual channel bodies (m's) through
to channel body sequences (100's m). The range of channel architectures
observed is related to the degree of confinement within the system. The lowest
sections of individual channel bodies and channel body sequences are typically
erosionally confined and are dominated by amalgamated channel deposits due to
the repeated re-incision of the channel base. The upper parts typically show
thinner, more laterally extensive, segregated channel deposits that are less
erosive and only amalgamate locally. Seismic data from the Foz do
AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California