What is the ratio of Zr/Ti in mud flat sediments?

I would like to know the Zr/Ti ratio present in mud flat sediments. Is there any world average or a range? I'm reading (from "Dellwig, O., Hinrichs, J., Hild, A., Brumsack, H.-J. (2000). Changing...

10 October 2013 3,021 3 View