Now I will tell you what the colors are this is from the panflict
Green: Colloidal sulphur/ ferrous salts
Orange: Antimony
Purple: Manganese oxide
White: Silica
Yellow-primrose: Sulphur
Red-Brown: Iron oxide
Black: Sulphur and carbon
The huge amounts of colors in the rocks are all natural due to different mineral elements.b
For you're information sulphur is the stuff that made us dislike geyser a bit sulphur has the smell of what they say "Rotten Eggs" all of this steam smells awful
Now this is what my father told me beneath my feet about 100 m down it bubbling lava and all of this bubbles up to the surface
Now real explanation Beneath the grown is a system of streams which are heated by magma left over from earlier eruptions.
The water is so so so boiling hot over 300 C that it takes away minerals from the rocks throughout which it takes them to the surface as rotten egg steam.
Now here are some pictures