I'm a geochemist. In the past ten years I've fixed mass spectrometers, blasted sapphires with a laser beam, explored for uranium in a nature reserve, and measured growth patterns in fish ears, and helped design the next generation of the world's most advanced ion probe. My main interest is in-situ mass spectrometry, but I have a soft spot in my heart for thermodynamics, drillers, and cosmochemistry.
Browsing through past Wo(G)E entries, it occurred to me that the most ubiquitous geomorphologic feature in the entire solar system had not yet been displayed. So here you go. The lat and lon are insufficient to win this contest; I want the name of the feature as well.