Plot sutures on a profile


I am trying to plot some sutures (black ‘triangles’, i.e RPZ, TAN, NKS …) in a profile. How could I archive this using GMT?

I have been trying to use:

gmt plot -Sf1/0.20+l+t+o1 -Gblack -W2p,black is the coordinates where I want to place the suture on the yprofile. For example:
200 8

Someone know how to plot sutures in a profile?
Thanks in advance!

-Sf Fault is a line, so you’d need a starting and ending point (the > is to separate segments):

0 0
0 1
10 0
10 1

You might want to use -Sf-1+… to have exactly 1 triangle.