PSU graduate student Natalie Culhane will present Understanding Mount Hood's Twin Lakes Fault, and Alyssa Smith returns with her Geology in a Nutshell News and Research.
Zoom link here.
Title: Understanding Mount Hood's Twin Lakes Fault
Description: Immediately south of Mount Hood, the Twin Lakes fault cuts off several drainage channels, forming a series of basins. This talk will summarize findings from lake sediment coring, surficial geologic mapping, geophysical surveys, and paleoseismic trenching I and my colleagues performed between two of these fault-dammed basins, Frog Lake and Lower Twin Lake, in one busy summer of 2024. Preliminary interpretations of these various data sources suggest multiple fault ruptures in recent geologic time, deeming the Twin Lakes fault an active tectonic feature that should be considered in local seismic hazard modeling.
Brief bio: Natalie Culhane is a second-year masters student at PSU working in the Active Tectonics lab under Dr. Ashley Streig. On her path to becoming a professional geologist, she has cored lake sediment from the Australian alpine, produced a USGS data release and publication on the runout lengths of earthquake-triggered landslides, and performed geohazard assessments at a local consulting firm. She currently interns part-time at DOGAMI, mapping landslides in the Sandy River corridor.