Fig. 3
![Fig. 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40623-015-0300-5/MediaObjects/40623_2015_300_Fig3_HTML.gif)
a, b Variations of the two ratios, χ ARM/χ and χ ARM/SIRM (in depth). c–f The FORC diagrams of the studied samples which obtained at 0.59, 6.97, 21.21, and 21.81 m core depth. The red lines mark the locations where the four samples were selected and the smoothing factors (SF) are given in the diagrams, respectively