Figure 5. These cores, split open on a deck, were extracted from a coastal marsh in central coastal Oregon. The cores nicely show the alternation of buried soils (black and brown units) and tidal mud (gray to brownish gray units). The top of each buried soil represents a time of abrupt relative sea level rise (coseismic subsidence) during an earthquake on the Cascadia subduction zone. See text for further discussion.
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Dec13 09
