Forgive me. I didn't mean to sound confrontational. To me, the building blocks of matter are more like an exquisite puzzle. Actually, now that I think about the question you were answering, "clump" is a good description to use. I have never heard of dark matter behaving like anything other than a fluid that is non interactive with charges or photons. If I were to hazard a guess at what dark matter might be, my answer would be that, probably before the leptogenesis and baryogenesis epochs of the big bang, there might have been a massive energy dump into extremely small non interacting particles, similar to neutrinos, but a lot smaller.