Brennan Williams-Mieding successfully defended his master research, titled “The origin of welding in the mafic Trail Bride Reservoir Ignimbrite – an analog for Martian Volcanism”
The Trailbridge Ignimbrite Project investigates a rare type of volcanic deposit formed by an explosive eruption of basaltic magma in Oregon about 5.5 million years ago. Unlike most mafic eruptions, which produce lava flows, this eruption generated a hot ash flow that became intensely welded as it cooled, creating a rock deposit with textures more commonly associated with larger silicic eruptions.
By studying the deposit’s rock textures, mineralogy, and volcanic history, the project aims to better understand how explosive mafic eruptions occur and what conditions allow these unusual deposits to form. The research also has implications beyond Earth, helping scientists identify similar volcanic deposits on Mars using rover imagery and spectral data.