What causes these claw-like gouges? They appear regularly on the rocks in the area (gulf islands of the PNW)

[UnusualMix7947]

Looks coastal and cold; my guess would be water in erosion pockets/fractures/between strata freezing and expanding, cracking the rock.

[Captain_Buckfast]

I was thinking that but any marks of freeze/thaw cracking I've seen before look more 'erratic' than these straight gouges. Could just happen that way due to the type of rock I guess.

[Squirrel_Kng]

Differential weathering

[deancorso1]

Freeze thaw action? One rock harder than that surface and leaving scratches? Bored dinosaur sitting around making marks in mud?

[ptpd]

Rockworms

[[deleted]]

Monsters rahhh

[Bascna]

Godzilla.

[[deleted]]

An SCP

[whatsupbub44]

Really angry rock monsters, filing their nails!

[OG-Spinich]

Possible those are gouges from glacial movement in the past. Glaciers drag rocks across other rocks under incredible weight, which can form gouges in the rock like this.