Keeping Pace: Continental (Nonmarine) Sequence Stratigraphy in a High Accommodation-Sediment Supply Regime, Hornelen Basin (Devonian), Norway
Donna S. Anderson, 2002. "Keeping Pace: Continental (Nonmarine) Sequence Stratigraphy in a High Accommodation-Sediment Supply Regime, Hornelen Basin (Devonian), Norway", Sequence Stratigraphic Models for Exploration and Production: Evolving Methodology, Emerging Models and Application Histories, John M. Armentrout, Norman C. Rosen
Download citation file:
Cyclic alluvial fan, braid plain, and lake deposits in a study area in the north-central Hornelen basin of west-central Norway yield insights into the formation of sequence boundaries and condensed surfaces in a high accommodation-sediment supply setting. Examination of facies architecture at two critical stratigraphic positions (times) within three large-scale cycles (sequences), the time of maximum basinward progradation of the orthogonally sourced alluvial fan and braid plain facies tracts and the time of maximum flooding across the basin, shows little erosion and sediment starvation, respectively. Hence, two key stratigraphic surfaces, sequence boundaries and condensed sections, do not form. In addition, the systems-tract configuration, while readily recognizable, becomes modified by the lack of regional erosion during sequence-boundary formation: a volumetrically displaced lowstand systems tract does not form. In this basin, high sediment supply keeps pace with high tectonic subsidence, creating an aggradational yet cyclic stratigraphic architecture.