{
 "about": "The record of this Plate: the facts it is drawn from, kept inside the work. Plain JSON; the artwork does not read it. CC0 1.0, no rights reserved.",
 "work": {"title": "Juan de Fuca", "series": "Plates", "artist": "Kenny Lienhard", "year": 2026, "plate": "38 of 52", "palette": "serpentine"},
 "plate": {"name": "Juan de Fuca", "code": "JF", "model": "PB2002 (Bird 2003)", "class": "micro", "area_km2": 256323, "centroid_lat_lon": [45.428, -127.529], "ocean_share": 1.0, "land_share": 0.0},
 "motion": {"frame": "no-net-rotation", "euler_pole_lat_lon": [-28.0921, 58.3088], "rotation_deg_per_million_years": 0.61344, "speed_mm_per_year_at_centroid": 21.01, "heading_deg_at_centroid": 73.1, "speed_range_mm_per_year": [14.74, 28.29], "the_artwork_drifts": "21.01 mm a year along its cut, one frame of rock every 21788 years"},
 "cover": {"slope and ridge": 0.8505, "deep ocean": 0.1495},
 "palette_from": ["ocean", "deep ocean"],
 "era": null,
 "past": {"account": "The past. At the ice age peak the sea here was about 4 to 6 degrees Celsius colder than today, and a little later the Cordilleran ice sheet reached the continental shelf off Vancouver Island, about 40 kilometres from the plate. The plate itself is deep ocean floor, so it never held ice or dry land. Between about 20,000 and 14,000 years ago, dozens of floods from glacial Lake Missoula burst down the Columbia River and ran on as underwater currents along Cascadia Channel, across the plate, leaving sand beds up to 57 metres thick in Escanaba Trough on its southern edge.", "source": "Paul et al. 2021, Climate of the Past 17:805; Prahl et al. 1995, Paleoceanography 10:763; Gowan et al. 2021, Nature Communications 12:1199; Dalton et al. 2020, Quaternary Science Reviews 234:106223; O’Connor et al. 2020, Earth-Science Reviews 208:103181; Normark and Reid 2003, Journal of Geology 111:617; Reid and Normark 2003, USGS Bulletin 2216; Zuffa et al. 2000, Journal of Geology 108:253"},
 "history": [{"years_ago": 54000000, "range_years_ago": [59000000, 49000000], "what": "The northern part of the Farallon plate broke away as a separate plate, the ancestor of this one.", "source": "Rosa and Molnar 1988, Journal of Geophysical Research 93:2997, doi:10.1029/JB093iB04p02997"}, {"years_ago": 7400000, "range_years_ago": [7770000, 7030000], "what": "The oldest ocean floor on this plate, now near its sinking edge, formed.", "source": "Seton et al. 2020, age grid v2020.1 processed here, Geochemistry Geophysics Geosystems, doi:10.1029/2020GC009214"}, {"years_ago": 326, "range_years_ago": [326, 326], "what": "A great earthquake of about magnitude 9 struck along this plate's sinking edge on 26 January 1700.", "source": "Satake et al. 1996, Nature 379:246, doi:10.1038/379246a0"}],
 "outline_lon_lat": [[[-129.46, 50.65], [-129.74, 50.84], [-129.98, 51.1], [-130.21, 51.28], [-130.55, 51.4], [-130.85, 51.61], [-131.07, 51.19], [-130.75, 50.91], [-130.25, 50.46], [-130.33, 50.3], [-130.16, 50.22], [-130.3, 50.06], [-130.16, 49.98], [-130.5, 49.48], [-129.71, 49.18], [-128.92, 48.87], [-129.15, 48.48], [-128.94, 48.32], [-129.19, 47.84], [-128.94, 47.73], [-129.26, 47.06], [-129.57, 46.4], [-129.8, 46.43], [-129.92, 46.23], [-130.05, 46.2], [-130.07, 45.94], [-129.87, 45.9], [-129.94, 45.74], [-130.19, 45.41], [-130.07, 45.29], [-130.37, 44.93], [-130.48, 44.59], [-129.5, 44.21], [-128.53, 43.82], [-127.57, 43.42], [-126.63, 43.01], [-127.04, 42.36], [-127.24, 41.69], [-127.4, 41.64], [-127.45, 41.56], [-127.56, 41.59], [-127.64, 41.08], [-127.72, 40.57], [-127.58, 40.54], [-127.58, 40.45], [-126.87, 40.42], [-126.16, 40.39], [-125.45, 40.35], [-124.74, 40.31], [-124.95, 40.63], [-124.93, 40.88], [-125.09, 41.14], [-125.18, 41.38], [-125.31, 41.65], [-125.28, 41.82], [-125.31, 41.99], [-125.33, 42.14], [-125.29, 42.28], [-125.21, 42.36], [-125.2, 42.49], [-125.27, 42.56], [-125.29, 42.86], [-125.29, 43.05], [-125.34, 43.14], [-125.39, 43.27], [-125.47, 43.43], [-125.48, 43.74], [-125.45, 43.93], [-125.43, 44.0], [-125.36, 44.07], [-125.37, 44.32], [-125.37, 44.52], [-125.38, 44.67], [-125.43, 44.73], [-125.44, 44.88], [-125.44, 45.1], [-125.52, 45.47], [-125.66, 45.95], [-125.77, 46.3], [-125.88, 46.64], [-126.0, 46.97], [-126.08, 47.35], [-126.37, 47.75], [-126.49, 48.0], [-126.73, 48.29], [-127.02, 48.56], [-127.38, 48.75], [-127.61, 48.88], [-127.82, 49.08], [-127.85, 49.49], [-128.03, 49.78], [-128.28, 49.88], [-128.41, 50.09], [-128.72, 50.31], [-129.01, 50.48], [-129.46, 50.65]]],
 "sources": ["Plate outlines and motion: Bird, P. (2003). An updated digital model of plate boundaries. Geochemistry, Geophysics, Geosystems 4(3), 1027, doi:10.1029/2001GC000252. No-net-rotation frame computed from PB2002 alone.", "What covers each plate: ESA CCI Land Cover and Water Bodies, NOAA ETOPO 2022, Koppen-Geiger climate maps, NSIDC Sea Ice Index, on a 1 arc-minute grid."],
 "engine_sha256": "a7fbc03acc0fc9ba343881bb88ddaf2b7564564d8bc9cbed16e75e47e01fb3f2"
}