First Time IPA

I'm brewing an extract IPA. I had some krausen coming through the hydrolock for the first 48 hrs, but it has trailed off and mellowed out.

Today, I opened the primary to add some Cascades for dry hopping. I noticed that there is a pretty large amount of solid crap floating right on top. It wasn't just foam, it had some serious mass to it. When I dumped the hops in (whole flower) I just let them lay on top of that stuff. Is this abnormal? Fermentation seemed to be going well thus far.

Any help is appreciated

I think your beer will be ok. The dry hops should sink into the beer once the krausen falls away completely.

I usually give the beer a full 2 or 3 weeks in the primary before racking to a secondary, then add dry hops in the secondary. I'll let the hops sit in the beer for a week or so then bottle.