This new collaborative REU Site hosted by California State University San Bernardino and the University of Cincinnati aims to recruit junior-level university students and sophomore-level community college students into geosciences educational and career tracks through year-long, cohort-based, authentic geologic research experiences that also include professional development training. The research activities center on resolving the movement history of the southern San Andreas fault (SAF) system, providing a unique opportunity to both further scientific understanding of this significant and hazardous fault and increase awareness of the societal importance of geoscience research and careers. Although much is known about the recent history (past 10,000 years) and the origin of the SAF system ~18-20 million years ago, less is known about its evolution during the intervening time. The goal of this REU is to help fill this knowledge gap by applying a combination of field-based and lab-based techniques in two-week field and lab components. This unconventional schedule will facilitate participation by students for whom a traditional summer research experience is not feasible. The project plan as well as student recruitment activities will broaden awareness of geoscience research and careers and their significance for society, while strengthening connections between 2-yr and 4-yr geoscience programs in southern California and the Ohio-Kentucky-Indiana tristate area. The research will a