What's this icon in my game?

[Lingam]

Hello,

I'm over 100 hours into this addicting game  and I sometimes see a new icon in the upper section, can anyone tell me what this is?

The icon looks like squiggly circles above the X in the help screen

Thank you

[LadyWYT]

It indicates which search mode your prospecting pick is set to, and only displays when held. Currently, you're set to the density search mode.

[Grummsh]

Yeah you get these prompts with tools that have different modes i think - like with scythe - either trim or cut mode.