I'm working on a map in GMT and am having trouble finding lon/lat data for the minor plate boundaries (specifically the adriatic). Is there a database I can refer to?
I did a little poking around and came across a few projects that might be interesting.
Seeing as you're interested more in minor plate dynamics, there's another project called GPlates that is an multi-OS open source visualizer for plate boundary dynamic reconstructions. While I haven't looked at the potential outputs available, I imagine you would be able to export data from this platform into a more traditional GIS data format (.shp, .gml) that could be read in GMT.