Publications, Abstracts & Presentations

Oolitic ironstones, such as those within the Lower Silurian Red Mountain Formation of Alabama, are highly debated sedimentary deposits with key astrobiological relevance due to their morphological and mineralogical similarity to deposits found on Mars. To address uncertainty regarding biosignature preservation [...] Continue. 

Iron-rich sedimentary systems (> 15 wt.% Fe) are primary targets for astrobiological exploration due to their reported mineralogical and morphological similarities to deposits found on Mars. However, the ability of these systems to retain biological evidence through geological time remains a subject of debate, as pervasive recrystallization often obscures or destroys primary organic associations. [...] Continue. 

Oolitic ironstones, such as those within the Lower Silurian Red Mountain Formation of Alabama, are highly debated sedimentary deposits with key astrobiological relevance due to their morphological and mineralogical similarity to deposits found on Mars. To address uncertainty regarding biosignature preservation [...] Continue. 

Despite the extensive distribution of oolitic hematite deposits, the origin and conditions of their formation are still under considerable debate. Currently, it is postulated that these enigmatic deposits are mineralogically composed of hematite, chamosite, or iron oxyhydroxides. Likewise, [...] Continue. 

The Mississippian Fort Payne Chert in northeastern Alabama contains megaquartz-lined geodes previously interpreted to have formed from low-temperature surface fluids or during shallow burial diagenesis at ~40 °C. Burial history models and regional paleomagnetic data, however [...] Continue. 

Oolitic hematite, a distinctive marine sedimentary rock composed of chemically precipitated hematite (a-Fe2O3) spheres, presents significant interest due to its complex mineralogy and formation processes. This study builds on a preliminary investigation by our group[1] which investigated hand samples from the Lower Silurian Red Mountain Formation that revealed [...] Continue.  

Despite the importance of nanoparticle (NP) hematite in materials science, geological applications, and astrobiology, the Raman spectrum acquired from this material is poorly understood. While the study of the Raman spectroscopy of bulk single-crystals has recently been well documented very few studies have centered on understanding the size-dependent changes [...] Continue. 

Oolitic hematite is a sedimentary rock featuring spheres of chemically precipitated hematite. Preliminary findings from Raman spectroscopic investigations into oolitic hematite from the Lower Silurian Red Mountain Formation has unveiled a diverse mineral composition alongside the presence of disordered sp2 carbonaceous material. Thermal analysis suggests  [...] Continue.