sediment- matter that settles to the bottom of a liquid
oxymoron- a figure of speech in which apparently contradictory terms appear in conjunction, such as, "sediment floating on top".
Any play on words, whether intentional or not is amusing to me. I'm a dork like that. Your thread title had me worried. I almost didn't open it last night
Glad you got the yeast rafts to settle. Even when using the same yeast, sometimes they form and sometimes they don't.