When geological contacts cross valleys or hilltops, the contacts are bent. The direction and amount of bending depends on the slope of the valley and the dip of the contact. This is one of six models that demonstrate the “Rule of V's”.
The “dual_extruder printer files” folder contain marker bed and body files that can be merged in the printing software and get assigned different colors.
It is of course also possible to print the pieces individually and glue them together as well! The second folder, named “single-extruder printer files”, contains each of the three pieces that can be printed separately.
The author marked this model as their own original creation.