Stone Tool Making Techniques: Transverse-parallel pressure thinning and resharpening

Transverse-parallel pressure flaking scars are oriented at an oblique angle to the edge perimeter, rather than straight-in.  Transverse-parallel pressure flakes were usually removed in a sequence, creating two or more parallel flake scars.  Often the parallel scars cover both faces of the tool.  

Elk River 1

Elk River Point

Danish dagger type V mwm

Type V Dagger

Arrowhead 8, UAE

Trihedral Arrowhead

Angostura point

Angostura Point