Morphologic
Architecture of a Coarse-Grained Turbidite: An Outcrop Study of the
Chaderton, Nysha A. N.1, Lesli
Wood2 (1) The
The Scotland Formation is a turbidite
succession composed of coarse-grained sandstones and shales. The only exposures
of this formation are located in the northeast part of the
Outcrop characterization of the Scotland
Formation integrates photomosaic architectural panels and measured sections
that investigate architecture of the formation, facies distributions, vertical
successions, gamma response, and patterns of the unit.
Some sand bodies observed in outcrop are
laterally continuous for over 100 m, and others show erosional bases and
channelized character. Six facies have been identified in outcrop: silty
shales; laminated, centimeter-scale sandstones interbedded with silts and shales;
cross-stratified sandstones; massive, medium- to coarse-grained sandstones;
very coarse grained sands with gravel or pebbles; and rare conglomerates. These
facies, combined with architectural elements such as channels, levees, slumps,
and depositional lobes, produce highly variable geometries within the system
and are indicative of a slope-apron to midfan depositional setting
An integrated study of the measured
sections and well logs forms the basis of a new geologic model of the
subsurface reservoir units within the Woodbourne oilfield.
AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California