Longitudinal GPS data can enhance the precision of spatial exposure assessment, yet few spatial epidemiologic studies incorporate such data and even fewer do so in the context of health equity. We examined geographic extent and variation in GPS-based mobility across three visits in the Trying to Understand Relationships, Networks and Neighborhoods among Transgender Women of Color (TURNNT) Cohort Study, a 1-year prospective cohort of transgender women of color aged 18–55 from New York, NY. Participants wore a standalone GPS device for one week at each visit. We visualized 7,415,171 GPS data points at baseline, 5,903,177 at 6-months, and 3,322,066 at 12-months. Participants covered a large spatial extent across all waves but specific locations visited varied, highlighting the importance of repeated GPS data collection over time. Longitudinal GPS data shows promise in characterizing mobility and exposure patterns over time in a marginalized population, offering methodological insights for future spatial epidemiologic research.
This contribution presents a 1:10.000 scale geological map of the Val di Lei basin (Italian Central Alps), produced within the framework of the Italian National Geological Mapping Project (CARG). The area mainly exposes rocks of the Suretta nappe (Middle Penninic) and minor portions of the Avers nappe (Upper Penninic). The Suretta nappe comprises a polymetamorphic basement, Carboniferous–Permian metaplutonites, and a Permian–Mesozoic metasedimentary cover. The structural framework reflects a polyphase Alpine deformation superimposed on relict pre-Alpine features. New field data refine the lithostratigraphy and the structural architecture of the Suretta nappe, providing new constraints on its polycyclic metamorphic evolution. Eclogite- and amphibolite-facies assemblages, together with localized evidence of partial melting, attest to a pre-Alpine evolution of the basement. These observations contribute to assessing the extent of Alpine overprinting on older metamorphic assemblages and may provide new constraints on the pre-Alpine evolution of basement units in this sector of the Central Alps.
Martian landslide inventories remain concentrated near the equator, particularly in Valles Marineris. We present 411 previously uncatalogued landslides spanning 63 degrees S-34 degrees N, extending coverage of the southern mid-latitudes and increasing the existing global catalogue by approximately 13%. Most events (73.7%) occur between 20 degrees S and 50 degrees S, and 84.9% originate within Early and Middle Noachian highland units. Rock avalanches dominate (49.1%), followed by slumps (26.8%), rock avalanche/ejecta forms (12.2%), and slump/rock avalanche transitions (11.9%). The apparent mobility index (H/L) ranges from 0.03 to 0.31 (5th-95th percentiles) and generally decreases with landslide area, although this relationship varies by type. No significant inventory-wide relationship exists between mobility and latitude. Crater size-frequency distributions of selected deposits indicate predominantly Late Amazonian model surface ages, with older surfaces reaching 1.68 +/- 0.48 Ga. This inventory provides new spatial, morphological, and chronological constraints on mass wasting beyond the well-studied canyon systems.
This study presents a 1:8000 geomorphological and structural glaciological map of south-western Admiralty Bay, King George Island, based on a 1979 aerial survey. The map covers an area of 37.9 km2 and documents 16 462 structures and landforms. Large-scale landscape characteristics are determined by bedrock geology sculpted by overlying ice masses. The glaciers can be broadly separated into highly-crevassed tidewater glaciers, and less dynamic land-terminating glaciers. Proglacial areas contain ice-cored terrain abandoned by receding ice masses, with paraglacial and periglacial features superimposed on larger-scale landforms. Between 1979 and 2025, glacier cover decreased by 7.6 km2 or 25.5%, with the recession of tidewater glaciers exposing 5.8 km of new coastline and increasing marine surface area by 0.9 km2. This map provides a historical foundation for glaciological and landscape evolution studies, in addition to investigations that monitor changing terrestrial and marine ecosystems in a warming climate.
We present a new geological map of the Marinkas Quellen carbonatite-alkaline complex (Southwest Namibia), which forms part of the Cambrian Kuboos-Bremen Igneous Province. Our mapping reveals that the complex was assembled through several pulses of alkaline silicate and conjugate carbonatitic melts, which formed by liquid immiscibility from strongly alkaline, mantle-derived parental melts. Alkaline melts crystallized ijolites and syenites, while carbonatitic melts evolved by fractional crystallization from calcite-carbonatites, through dolomite-carbonatites, to ferro-carbonatites. The final emplacement was controlled by late-magmatic, fluid-mediated processes, which induced the recrystallization of part of the carbonatites, andredistributed alkali and light Rare Earth Elements (REE) through and around the intrusive complex. Fluid release and consequent over-pressurization during magma uprise enhanced hydraulic fracturing and brecciation in the country rock and within the complex itself, promoting further magma ascent. The Marinkas Quellen carbonatite-alkaline complex is an outstanding case study to investigate the physico-chemical processes of carbonatites genesis, evolution and emplacement.
