J. F. Roux
Roux thought that the act of artistic creation resides in the decisions that the artist makes about what to leave out from the represented world, so that a painting is the product of the artist’s considered choices about what forms and colours to emphasise. There are some early paintings at Langebaan of fishing boats and later, from a trip with Margot to Sicily, of dwellings. Roux was also commissioned on occasion to paint pictures of farm houses. But on the whole, his landscapes represent nature in all its timelessness, stripped of any trace of human intervention.
Redox
In geology, redox is important to both the formation of minerals and the mobilization of minerals, and is also important in some depositional environments. In general, the redox state of most rocks can be seen in the color of the rock. The rock forms in oxidizing conditions, giving it a red color. It is then "bleached" to a green—or sometimes white—form when a reducing fluid passes through the rock. The reduced fluid can also carry uranium-bearing minerals. Famous examples of redox conditions affecting geological processes include uranium deposits and Moqui marbles.