Tidally Laminated Sediments

In geology lamination is a small scale sequence of fine layers laminae.

Tidally laminated sediments.

Sediment delivery from the fly river tidally dominated delta to the nearshore marine environment and the impact of el nin o andrea s. Gon i 2 and john s. Crockett1 received 24 august 2006. Accepted 25 may 2007.

Published 31 january 2008. A horizontally laminated black mudstone followed by flaser or lenticularly bedded sandy mudstone and erosively overlain by cross bedded channel sandstone. Lamina that occurs in sedimentary rocks laminae are normally smaller and less pronounced than bedding lamination is often regarded as planar structures one centimetre or less in thickness whereas bedding layers are greater than one centimetre. Tk s rs sediments from the kap stewart formation in scoresby land are described and interpreted as tidally in d j fluenced detaic deposits.

A tidally averaged sediment transport model of san francisco bay was incorporated into a tidally averaged salinity box model previously developed and calibrated using salinity a conservative tracer uncles and peterson 1995. Although this result is reasonable when only the three sites are compared both values are lower than predicted by existing threshold models with a. However structures from several millimetres to many centimetres. Laminated glacimarine sediments form by a variety of processes including suspension settling from turbid overflow plumes turbidity current deposition and contour current activity.

Preston martin 1 miguel a. One representing the channel 5 meter depth and the other the shallows 0. Revised 3 march 2007. Two major types of sequences can by destinguished.

At d2 non cohesive sediment and b4 d1 cohesive sediment the critical shear stresses for seabed erosion or resuspension were estimated to be 0 11 and 0 07 0 09 n m 2 respectively.