In a new paper, Jordan Jensen and Alexis Ault introduce a new forensic tool designed to enhance our understanding of how unconformities form. Iron oxide minerals are found in rocks around the world.

The process starts with rust, or ferric oxide ... lose their clarity and become a more opaque green. [Chase]’s crystal-growing efforts have shown up here before, when he turned humble table ...

It has been regarded by some as quite doubtful whether any cheap and practicable method for the prevention of iron rust, that will permanently secure this object can be devised, yet it would seem ...