Nicely stacked rocks in Lake Powell near the town of Page in Arizona, USA. The normal colour of rocks changes nearer to the water. Referred to as the “bathtub ring,” the pale outline shows when the lake is below capacity. Calcium carbonate and other mineral compounds, many of them various salts in the water, attach themselves to the sandstone and leave behind this white mark. The top of the white mark is the high water mark.
Let me start by introducing myself. I'm Frank from the Netherlands, currently sixty-eight years old and retired for over a decade already. This gives me plenty of time to spend on one of the most fascinating hobbies I have, photography. It combines really well with travelling, another.. Read more…