And as the sandstone weathers, new grains break free.

Some of those grains may then cement naturally into sandstone.

This sandstone wall that I'm proposing essentially does three things.

It takes a pile of loose sand and it creates sandstone out of it.

My response is a sandstone wall made from bacteria and solidified sand, stretching across the desert.

So, we have a way of turning sand into sandstone, and then creating these habitable spaces inside of the desert dunes.

And here is actually the spinal column and the whole torso encased in a sandstone block, because she was buried by a river.

It was then, after such hard work and many frustrating years that we found Selam, and you see the face here covered by sandstone.

And this was built by depositing artificial sandstone layer upon layer in layers of about five millimeters to 10 mm in thickness slowly growing this structure.

Arrangements have been established for aquifers, such as the Nubian Sandstone Aquifer System, the Carpathians in Eastern Europe, the Danube River, the Sava River Basin in the Balkans and the Lake Victoria Basin.

Here is a close up of the fossil, after five years of cleaning, preparation and description, which was very long, and I had to expose the bones from the sandstone block I just showed you in the previous slide.

Grateful for UNIDO's assistance in the past, the authorities eagerly awaited guidance on such matters as science and technology policy and its operationalization in the country's industrialization, the framework for development of the Industrialization Master Plan, and tanneries and sandstone cutting projects.