1 Now I'd like to just show you that not only is it intense, but it 



2 is quite frequent in terms of resuspension activity. Here is a summary 



3 diagram that shows a number of things. The first is an x ray of the 



4 sediment trap sample itself, showing variability in texture. 



5 The darker layers represent sand lenses, actually, that were 



6 collected as a result of a rather intense current event where 



7 resuspension of the coarser sediments has taken place. 



8 This particular sediment trap had, in addition, an instrument 



9 inserted that discharged a layer of teflon e^^ery 10 days during the 



10 deployment. The layer of teflon is shown by this reddish-brown layer in 



11 the figure just above the x ray. 



12 Actually, if you see the original x ray, you can see the teflon 



13 layers. If you split the core, they are beautiful white bands just like 



14 bars on a 10-day interval. The advantage of using this extra wrinkle in 



15 a sediment trap, is that you can measure the volume, the mass, and the 



16 texture of sediment between the 10-day intervals; correlate that, 



17 perhaps, with currents. 



18 You get a feeling for the variability in mass collected throughout 



19 the deployment period on a 10-day interval. This histogram at the top 



20 of the slide, indicates just what that variability is. Here we're 



21 showing the percent of the total weight collected over each 10-day 



22 interval as identified by the layers of teflon. 



23 The hachured levels in this particular diagram are designed to 



24 show where we have sandy sediments. You can see that there is a factor 



25 of almost 10 in the flux of sediment in every 10-day period. This 



26 correlates fairly well, but not perfectly, with the current stress 



27 measured by the combination of currents and waves at the bottom. 



28 You can see that there's a major peak here, about the 25th of 



29 November. It corresponds to a sand layer and to a flux, which is 



30 maximum throughout that period. There is also a smaller storm before 



31 the 16th of October, which is shown here, and another event at the end 



32 of the deployment period where we find an increased flux. 



33 It's not always perfect. For example, in this particular event on 



34 the 15th of November does not seem to show itself in the sediment trap. 



63 



