We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Micro-erosion meter measurements of travertine deposition rates: a case study from Louie Creek, northwest Queensland, Australia
- Authors
Gillieson, David; Drysdale, Russell
- Abstract
Although originally designed to measure surface denudation, the micro-erosion meter (MEM) can be adapted easily to measure deposition rates of chemical sediments such as travertines and speleothems. At Louie Creek, northwest Queensland, Australia, travertine deposition ratesmeasured using the MEM average 4715 mm a-1. However, thisfigure masks considerable rate variability. Both purely hydraulic and hydraulically related variables appear to be the major mechanisms controlling deposition rates. The most rapid rates occur within relatively high-energy hydraulic regimes (impact and flow zones), whilst deposition rates in pools separating individual travertine barrages (standing water zones) are relatively slow. Dsposition rate variations within spray and impact zones are related directly to discharge. The highest rates in flow zones correlate with the incorporation into the travertine of in situ and allochthonous biogenic material, such as caddis fly larvae, green algal mats and phytoclasts, which proliferate or are entrapped easily under such hydraulic conditions. Considerablespatial variability in deposition rates also prevails. The highest rates for a given set of hydraulic conditions occur at two sites, the Upper Everglades and the Lower Everglades. The MEM also measures net erosion of travertines. At Louie Creek, most of the travertine erosion occurs in the wet season and is confined primarily to standing water zones.
- Subjects
GEOMORPHOLOGY; HYDRAULICS; EROSION; INSTRUMENTATION technicians
- Publication
Earth Surface Processes & Landforms, 1997, Vol 22, Issue 11, p1037
- ISSN
0197-9337
- Publication type
Article