{
  "schema": 1,
  "checked_at": "2026-10-02",
  "review_status": "Author source review; independent geologist review remains open.",
  "sources": [
    {
      "id": "G01",
      "title": "Hoodoos",
      "publisher": "National Park Service, Bryce Canyon National Park",
      "url": "https://www.nps.gov/brca/learn/nature/hoodoos.htm",
      "published_or_updated": "2021-09-04",
      "supports": "Physical weathering and erosion; sediment predates sculpting; contrasting resistance contributes to projecting and recessed intervals.",
      "limits": "No numerical ages, local erosion rates or annual freeze counts are adopted. The Lake Claron image is third-party media and is not reused.",
      "rights": "Original paraphrases and links only; no source text or media copied.",
      "verification": "Page opened and relevant process text read, 2026-10-02."
    },
    {
      "id": "G02",
      "title": "Wall and Narrows",
      "publisher": "National Park Service, Bryce Canyon National Park",
      "url": "https://www.nps.gov/brca/learn/nature/wallandnarrows.htm",
      "published_or_updated": "2021-09-04",
      "supports": "Fins are narrow walls bounded by fractures; cracks admit water; runoff can transport broken material.",
      "limits": "No universal joint-origin, weather schedule, freeze count, precise age or absolute dolomite-dissolution claim is adopted.",
      "rights": "Original paraphrases and links only; no source photograph or diagram copied.",
      "verification": "Page opened and relevant process text read, 2026-10-02."
    },
    {
      "id": "G03",
      "title": "Arches",
      "publisher": "National Park Service, Bryce Canyon National Park",
      "url": "https://www.nps.gov/brca/learn/nature/arches.htm",
      "published_or_updated": "2015-02-24",
      "supports": "Openings in fins, Natural Bridge as a window/arch, gravity, and a conceptual window-to-pillar sequence.",
      "limits": "Terminology is qualified; no window size threshold, universal sequence, duration or failure forecast is taught.",
      "rights": "Original paraphrases and links only; no source photograph or diagram copied.",
      "verification": "Page opened and terminology/process discussion read, 2026-10-02."
    },
    {
      "id": "G04",
      "title": "Deciphering Nature’s Palette wayside",
      "publisher": "National Park Service",
      "url": "https://www.nps.gov/places/deciphering-nature-s-palette-wayside.htm",
      "published_or_updated": "2024-01-08",
      "supports": "Informal upper white and lower pink Claron members; varied sedimentary materials.",
      "limits": "Member order is not a local thickness or color-classification rule. Numerical ages and simplified uplift account are not reproduced.",
      "rights": "Original paraphrases and links only; wayside artwork is not copied or traced.",
      "verification": "Wayside text opened and read, 2026-10-02."
    },
    {
      "id": "G05",
      "title": "Geology of Bryce Canyon National Park",
      "publisher": "US Geological Survey",
      "url": "https://www.usgs.gov/geology-and-ecology-of-national-parks/geology-bryce-canyon-national-park",
      "published_or_updated": null,
      "supports": "Carbonate dissolution; fault displacement; relative superposition under stated assumptions.",
      "limits": "The broad page’s stratigraphic grouping and simplified tectonic/rock-type claims are not adopted. No pH or dissolution rate is inferred.",
      "rights": "Original paraphrases and links only; no photograph or diagram copied.",
      "verification": "Relevant dissolution, faults and stratigraphy paragraphs read, 2026-10-02."
    },
    {
      "id": "G06",
      "title": "Grand Staircase",
      "publisher": "National Park Service, Bryce Canyon National Park",
      "url": "https://www.nps.gov/brca/learn/nature/grandstaircase.htm",
      "published_or_updated": "2024-06-03",
      "supports": "Regional sedimentary succession linking Bryce, Zion and Grand Canyon.",
      "limits": "No diagram is treated as a measured transect or evenly spaced clock.",
      "rights": "Original paraphrases and links only; no source artwork copied.",
      "verification": "Page opened and regional definition read, 2026-10-02."
    },
    {
      "id": "G07",
      "title": "NPS Stratotype Inventory",
      "publisher": "National Park Service, Geology",
      "url": "https://www.nps.gov/subjects/geology/nps-stratotype-inventory.htm",
      "published_or_updated": null,
      "supports": "Formation/member/bed hierarchy and multiple properties used in mapping rock units.",
      "limits": "Does not identify any contact or sample on these cards.",
      "rights": "Original paraphrases and links only; no media copied.",
      "verification": "Introduction and The Best Rock section read, 2026-10-02."
    },
    {
      "id": "G08",
      "title": "Bedrock fracture by ice segregation in cold regions",
      "publisher": "Science 314, 1127–1129; abstract indexed by US National Library of Medicine",
      "authors": "Julian B. Murton, Rorik Peterson, Jean-Claude Ozouf",
      "url": "https://pubmed.ncbi.nlm.nih.gov/17110573/",
      "doi": "10.1126/science.1132127",
      "published_or_updated": "2006-11-17",
      "supports": "Experiments support ice segregation as a bedrock-fracture mechanism; a simple air-temperature crossing does not measure fracture.",
      "limits": "Experimental abstract evidence, not Bryce field calibration. Direct page extraction was empty; indexed primary abstract wording was verified by targeted search, consistent with the retained source register.",
      "rights": "Copyright AAAS; brief original paraphrase, no article text or figures reproduced.",
      "verification": "Primary abstract indexed result verified, 2026-10-02; full paper not reviewed in this lane."
    },
    {
      "id": "D01",
      "title": "Integrated Sunset Point sector: terrain, profile and imagery metadata",
      "publisher": "BCC integrated landmark collection, derived from USGS 3DEP; imagery metadata from USDA NAIP",
      "url": "../../../landmarks.html#study-sunset-point",
      "published_or_updated": "2026-10-02 integrated snapshot",
      "supports": "Actual 129-node center row across 512 m; 2018-source elevation; upper-envelope processing; 2024-07-23 imagery date; encoding and surface limits.",
      "limits": "Historical educational derivative. Source native horizontal NAD83(2011)/UTM12N; export horizontal WGS84/UTM12N; vertical NAVD88/Geoid12B retained. No survey-grade datum alignment, underground contacts, hidden undersides, navigation or current condition. Named locator used by the source study came from OpenStreetMap; no locator coordinates or OSM data are redistributed by this pack.",
      "rights": "USGS elevation data public domain; original BCC derivation and diagrams. Only numeric height subset and source metadata reused. No USDA image pixels, third-party photographs, fonts, maps or prior illustrations copied.",
      "verification": "Copied model.json, profiles.json.gz, imagery.json and source builder inspected; hashes and exact extraction recorded in terrain-profile.json."
    },
    {
      "id": "D02",
      "title": "USGS 3DEP lidar source and National Map terms",
      "publisher": "US Geological Survey; public Entwine registry maintained by Hobu",
      "url": "https://www.usgs.gov/faqs/what-are-terms-uselicensing-map-services-and-data-national-map",
      "dataset_url": "https://registry.opendata.aws/usgs-lidar/",
      "published_or_updated": null,
      "supports": "USGS data public-domain status and acknowledgment; dataset identity USGS_LPC_UT_Southern_QL1_2018_LAS_2019.",
      "limits": "Rights and dataset identity do not establish scientific accuracy of downstream derivatives. No dataset acquisition in this lane.",
      "rights": "US Government Public Domain. Map services and data available from U.S. Geological Survey, National Geospatial Program.",
      "verification": "USGS rights page and named dataset registry opened, 2026-10-02."
    }
  ]
}