caption: The image shows a page from a book with a drawing of a brick wall and a diagram of the structure of the wall. At the bottom of the page, there is some text which reads "Geology". The diagram is composed of several blocks of stone, each with its own unique shape and texture. The blocks are arranged in a pattern, with some of them overlapping each other, and the text is written in a bold font. The colors used in the drawing are mostly shades of grey and brown, giving the image a rustic feel.