Gypsum insulation??? 😧
What you're looking at is a gypsum formation grown out in a circle, naturally, like cotton candy or even better, insulation. The only places I have seen this was here, in Mammoth in the Paradise section of New Discovery and in the Crystal Passage in Fitton cave in Arkansas. It's always mindblowing to see formations in far away locations that resemble something back home.
Shot on the Samsung Galaxy S9+.
No flash, manual balance. Low blue external light for effect. ISO: 320. Exposure: 1/25 sec.