Sediment mixing in the tropical Pacific and radiolarian stratigraphy

Sediment mixing in the tropical Pacific and radiolarian stratigraphy

[1] The reworking of older radiolarian microfossils into near-surface sediments of the tropical Pacific has long been the source of confusion for the development of radiolarian stratigraphy and of puzzlement over the mechanism(s) that could effect such pervasive reworking. Widespread dissolution “pits” in the sediments of the tropical Pacific are believed to be associated with hydrothermal circ...

Predictive modeling in sediment transport and stratigraphy

Fluvial and coastal environment (1) HydroTrend3.0: a climate-driven hydrological transport model that simulates discharge and sediment load leaving a river system: A.J. Kettner (Delft U. Technology) and J.P.M. Syvitski (INSTAAR) (2) Geolocation of man-made reservoirs across terrains of varying complexity using GIS. D.M. Mixon (INSTAAR), D.A. Kinner (Western Carolina U.), R.F. Stallard USGS), an...

CHILD: Variable Sediment Texture and Alluvial Stratigraphy

the seasonal variability of ozone mixing ratios and budgets in the tropical southern Pacific

tropical southern Pacific Authors: Jennifer C. Wei, V. R. Kotamarthi, D. J. Wuebbles Abstract. Significant seasonal variations in the concentrations of ozone, NOx, nonmethane hydrocarbons and other trace gases were observed in the southern tropical Pacific during the PEM-TROPICS-A (PT-A, Sep/Oct 1996) and PEM-TROPICS-B (PT-B, Mar/Apr 1999). Making these data sets more useful would require devel...

Sediment supply and climate change: implications for basin stratigraphy

The rate of sediment supply from erosional catchment to depositional basin depends primarily upon climate, relief, catchment slope and lithology. It varies in both time and space. Spatial changes in erosion rates due to variations in lithology are illustrated by contrasting rates of drainage divide migration away from faults of known ages. Time variations in relative sediment supply are extreme...