Microstratigraphic Analysis of Fossil Distribution in the Lower Hornerstown and Upper Navesink Formations at the Edelman Fossil Park, NJ

Maastrichtian–Danian sediments of the Navesink and Hornerstown formations at the Jean and Ric Edelman Fossil Park of Rowan University in Mantua Township, New Jersey, have long intrigued paleontologists. Within the basal Hornerstown Formation occurs the Main Fossiliferous Layer (MFL), a regionally well-known and diverse bonebed. The lithostratigraphic and chronostratigraphic position of this fossil layer have been debated for more than 50 years, fueling debate over its origin. Herein, we present the results of a microstratigraphic analysis of the fossil composition and distribution of the MFL undertaken to rectify these discrepancies. Through methodical top-down excavation, we recorded the three-dimensional position of every fossil encountered. Three-dimensional visualization and analyses of these data in ArcGIS Pro yielded an unprecedented view of this bonebed. Most reported discrepancies about the stratigraphic placement and thickness of the MFL can be explained by the presence of two distinct fossil assemblages within this interval that are occasionally combined into a single bonebed. The stratigraphically-lower assemblage, herein termed an “oyster layer”, is geometrically-tabular and exhibits low taxonomic diversity, high abundance of the oyster Pycnodonte, and moderate taxonomic richness. The stratigraphically-higher assemblage, the MFL, occurs approximately 9 cm higher in section and exhibits high values of taxonomic diversity, fossil abundance, and taxonomic richness. Sedimentological homogeneity throughout this interval suggests that these faunal contrasts arise from the two assemblages having formed via independent taphonomic pathways. Specifically, prevalence of Pycnodonte in the oyster layer implies formation by a selective mortality event, whereas the diversity of the MFL appears to reflect a more universal agent of mortality. Spatial variations in the stratigraphic distribution of fossils within the MFL in our excavation area indicate this assemblage does not form a simple, tabular layer as previously thought and may, in part, record original bathymetry. Importantly, our definition of the MFL and detailed characterization of its stratigraphic placement are essential for future studies on the taphonomic origin and chronostratigraphy of this bonebed. Universal use of this definition would allow researchers to confidently elucidate the exact lithostratigraphic positions of precise chronostratigraphic indicators within the MFL and accurately estimate the degree of time averaging of its fossils.

The role of extracurricular activities and lectures in mitigating medical student burnout

Context Strong evidence throughout the literature highlights burnout as a significant and increasing problem among medical students, impacting students’ ability to effectively care for and empathize with patients. Objectives To examine how involvement in extracurricular activities and attendance at burnout lectures can impact burnout among medical students. Methods An anonymous digital survey including the Maslach Burnout Inventory (MBI) was sent to all students (n=765) at Rowan University School of Osteopathic Medicine. The survey included questions regarding the number of burnout/wellness lectures respondents had attended, the number of clubs in which the respondents participated, the number of hours spent in these clubs, and any leadership positions held by the respondents. Results Of the 765 students enrolled, 597 completed the survey. Results indicated that women participated in significantly more clubs than men (t[456]=−4.30; p<0.001). Men had higher scores on the depersonalization subscale of the MBI than women (t[463)=2.98; p<0.01]. There were no gender differences in emotional exhaustion or personal accomplishment. Linear regression analyses including gender and club participation as predictors of each of the burnout subscales indicated a significant interaction between gender and number of clubs (β=0.34; p<0.05), in that more club participation was associated with higher depersonalization scores for women, but lower depersonalization scores for men. The number of wellness/burnout prevention lectures attended was not predictive of scores on any of the burnout subscales. Conclusions Our results indicate the importance of understanding what drives burnout on the individual level and adapting interventions to suit the needs of individual students, rather than the student body as a whole.

Transforming a clerkship with telemedicine

The coronavirus disease 2019 (COVID-19) pandemic had an overwhelming impact on both clinical practices and learning environments. On March 17th, 2020, the American Association of Colleges of Osteopathic Medicine and Commission on Osteopathic College Accreditation issued a statement recommending a “pause” in medical student participation in-person at clinical sites. In response, the Family Medicine Department at the Rowan University School of Osteopathic Medicine recognized the need to evolve the traditional curriculum and quickly transitioned to an online format, incorporating telemedicine into the clerkship. This new model enabled 44 third-year medical students to obtain high-quality, offsite, virtual education and learn new skills.