We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Paralic sedimentation on an epicontinental ramp shelf during a full cycle of relative sea-level fluctuation; the Helvetiafjellet Formation in Nordenskiöld land, Spitsbergen.
- Authors
Midtkandal, Ivar; Nystuen, Johan Petter; Nagy, Jenö
- Abstract
A depositional model for the development of the Helvetiafjellet Formation in Nordenskiöld Land, Spitsbergen is presented. The formation was deposited into a segment of the large epicontinental Boreal basin that rimmed northern Pangaea during the Early Cretaceous. A wide range of depositional subenvironments are recorded within the succession; including fluvial braidplain, shallow marine bay, delta, coastal plain and fluvial channel. The depositional model approaches a layer-cake style for this part of the basin, caused by the rapid rates of progradation and retrogradation made possible by the gentle depositional gradient. An initial period of fluvial deposition arose in response to an early rise in relative sea-level. Following a regional flooding, the progradational to aggradational architecture in the area reflects a balanced rate of increase in accommodation vs. rate of sedimentation (A/S) ratio. This resulted in a heterolithic stacking of sandstone and mudstone. Autogenic variables are thought to have dominated the lateral facies variations recorded in the upper and middle parts of the succession.
- Subjects
OCEAN; ABSOLUTE sea level change; RELATIVE sea level change; MARINE geodesy; COASTAL changes
- Publication
Norwegian Journal of Geology / Norsk Geologisk Forening, 2007, Vol 87, Issue 3, p343
- ISSN
0029-196X
- Publication type
Article