The band is completely natural, it's just a different mineral that got sedimented/layered when the rock was formed. The different color is probably just the natural chemical reaction of that mineral to the elements.
These type of round rocks are just called "bulbous" here, and their shape is usually explained as having to do with sediments of carbonate layering over the organic remains of ancient marine life.
It's also said that there is a Bedouin legend that relates how these are skulls of evil people that were punished by Allah, and serve as a reminder to be good to travelers in the desert.
This one is even more wrinkled
But oh the memories it brings back from my first trip to Europe in 1972.
I am positive that 100 pesetas were less than 1 dollar, but I do remember buying my first bottle of wine for 9 pesetas...
We are having the best spring weather in years. Today was like summer (62F, sunny). We are doing the same walks/hikes over and over again but at least they are beautiful. Today was a short 4.5 mile walk from home. Last week we climbed that hill in the distance. Hope to do that again but it makes for a much longer hike. The hill is not high (nothing is around here).
I've been exploring the local woodland. I am lucky as I have large areas of semi natural woodland within a few minutes walk of my house. Even though these are probably in the centre of Scunthorpe, you could be miles in the countryside.
Today's walk took me to Central Park in Scunthorpe a large area of grassland with mature specimen trees, shrubs and a few flower beds. It is popular with dog walkers, joggers, families asnd oldies like myself who enjoy a walk in teh sunshine. It is never so busy as to cause problems with social distancing.
Last May I accompanied Erica Jarman on a 10 trip in Il Casentino, a remote area of eastern Tusany. This was a castle tower in a little hamlet we stayed in where maybe 10 people lived. I am missing Italy terribly as it is my second home; missing my community there and so proud of the way they are managing the pandemic for the whole of us. Let's get this thread back on track and do some more posting. It's a lovely idea for these times when travel is suspended. I wish everyone good health and travel images!