Figure 38--Megacycles. Basic assumption: Lofer cyclothems have uniform period. Twenty cyclothems of Steinernes Meer section are shown as stratigraphic column at right. Toward left, they are spread out evenly along time dimension of diagram. Mean subsidence vector connects sea level at time 0 with base of stratigraphic column at time 20. Each cyclothem is plotted at proper stratigraphic height above this vector. Cyclothems plot in undulating line, in sets of six to eight, which may be taken as megacycles. This megacyclic pattern is attributed to variations in rate of subsidence, and suggested actual subsidence curve is drawn alongside mean subsidence vector.
Kansas Geological Survey
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Web version August 2003. Original publication date Dec. 1964.
URL=http://www.kgs.ku.edu/Publications/Bulletins/169/Fischer/fig38.html
