Scott: Thank you for your very constructive suggestion. The problem with the terrain I’m studying is that the hades of the intersecting faults are unclear from surface evidence although relative uplift sides can usually be distinguished. I think there is a mixture of normal, reverse and strike-slip faults present although most appear to be rectilinear from their eroded but fairly low relief surface traces. They seem to result from a complex isostatic rebound.
Malcolm.
> On 21 Jan 2016, at 09:22, Scott Bennett <[log in to unmask]> wrote:
>
> Hi Malcolm--
>
> A generic term you may consider useful to describe your originally planar surface (e.g. peneplain) is "strain marker" or "planar strain marker". This term is widely used to describe a once-continuous feature, which has subsequently been deformed, and can be used to restore and quantify deformation (e.g. %-extension). And, as others have suggested, you should be comfortable reporting the inclination of this "strain marker" relative to modern-day horizontal, as it varies from one "fault block" to another, with the term "dip". As such, you may end up saying something such as, "....the dip of the peneplain strain marker increases from west to east, across several fault blocks....".
>
> Cheers,
> Scott
>
> ----------------------------------
> Scott Bennett
>
> Research Geologist
> U.S. Geological Survey
> Seattle Field Office
>
> Affiliate Assistant Professor
> University of Washington
>
> [log in to unmask]
> www.scottekbennett.com
> profile.usgs.gov/sekbennett
> ----------------------------------
|