11.27.14: Ugh...weird blackness and new layers???

So I took these pictures on Thanksgiving Day, but good times were had, so I ended up uploading them now.

Some layers were finally visibly established--most notably the top mud layer that is black.
Also, one of my columns looks drastically different. I can't really explain it, but here's a photo:

Apparently, my water column decided to migrate to the middle of the column...haha.

If you looks really closely as the top of the mud, there's a layer of dark, blackish mud. What kind of bacteria is this? Hmm...I located a source that provides the following as a possible explanation:

"The sulphur-reducing bacteria (Fig. B) such as Desulfovibrio can utilise these fermentation products by anaerobic respiration, using either sulphate or other partly oxidised forms of sulphur (e.g. thiosulphate) as the terminal electron acceptor, generating large amounts of H₂S by this process. [In our ownaerobic respiration we use O₂ and reduce it to H₂O]. The H₂S will react with any iron in the sediment, producing black ferrous sulphide. This is why lake sediments (and our household drains) are frequently black. However, some of the H₂S diffuses upwards into the water column, where it is utilised by other organisms"

Source: <http://archive.bio.ed.ac.uk/jdeacon/microbes/winograd.htm>

Here's column #2:

The black layer is much more noticeable here, but my water column is still on top off the mud instead of wedged in the middle of it, such as in column #1.

I'm glad to see much more is happening apart from gas buildup and rising mud! I wonder what I'll see next.