Blue swirls

I am in the comfort zone with both macro and mono which this image is. That is what 4 years of blipping can do to your photography.

I wonder if you can guess what is making the swirls. After a guess see tags.It was an idea I had when my cemetery trip was rained off. I am comfortable around those too and thought I would get a good mono there.
Anyway I had a lot of fun with this today and I have a sneaking suspicion it may come in handy for tomorrows TT. I turned this into cyanotype with Lightroom but did little else.

Thanks Ellaphant for the idea. Enjoy your first time hosting. We will be gentle on you. I did my first hosting earlier this year but on TT and thoroughly enjoyed it and learnt so much.