Is this mold?

[ScoobyDude]

Pictures of my kettle sour in the secondary with berries. I had dumped (frozen/thawed) berries into secondary straight from bag and racked on top. Hadnt had issues with this in the past. Wondering if this is even mold. It looks like hardened crystals of something.

Think its mold? And if it is, can i rack below it into a keg or would this be risky to drink?

 

[Calder]

I don't think it is anything I would be worried about. Sours pretty much protect themselves. Probably just some Lacto or wild yeast. When it turns green is the time to get worried.