Two-toned beer?

I’ve got a Brett beer that has a dark-rum colored rim round the top with a cloudy, amber body. The ring is about 3/4 inch thick and fairly distinct. Has anyone seen this before? What is it? Here’s a picture:

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That’s just the yeast slowly dropping out of suspension.

Yup.  Give it a few days, it’ll all drop out and look like the beer on the top.

Whew. That’s a relief. My other beers tend to clarify quicker than this, but I’ve been told that Brett is a slower acting yeast. Thanks.