{
  "dataset_name": "US Geological Features",
  "source": "USGS, compiled for SCARS project (dev/map)",
  "last_updated": "2026-02-10",
  "files": {
    "cretaceous_arc.geojson": "Cretaceous-era geological arc boundary",
    "deep_south_timeline.geojson": "Historical timeline features for Deep South region",
    "geological_regions.geojson": "Major US geological regions",
    "mineral_deposits.geojson": "Mineral deposit locations across the US"
  },
  "format": "GeoJSON (EPSG:4326)",
  "notes": "Part of the SCARS project — maps geological features against socioeconomic data at the county level."
}