
geiger or soft resin
It's left behind after a Tunnel Nuker explodes.
Scanning this is requirement for the Resin Handling research. This research also requires to put 25 Soft Resin block into the Laboratory in order to research it. Apart from this research, there is no other use for this block other than to create Construction Paste from this.
Important: On this block the Worm Bosses can spawn, it is highly recommended to remove it if it is near your base.