{
 "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": "Amur", "series": "Plates", "artist": "Kenny Lienhard", "year": 2026, "plate": "13 of 52", "palette": "kaolin"},
 "plate": {"name": "Amur", "code": "AM", "model": "PB2002 (Bird 2003)", "class": "minor", "area_km2": 5303397, "centroid_lat_lon": [46.137, 125.616], "ocean_share": 0.2174, "land_share": 0.7826},
 "motion": {"frame": "no-net-rotation", "euler_pole_lat_lon": [43.3045, -99.0384], "rotation_deg_per_million_years": 0.30155, "speed_mm_per_year_at_centroid": 33.22, "heading_deg_at_centroid": 121.1, "speed_range_mm_per_year": [31.4, 33.53], "the_artwork_drifts": "33.22 mm a year along its cut, one frame of rock every 18797 years"},
 "cover": {"boreal forest": 0.258, "forest": 0.1402, "grassland": 0.1374, "cropland": 0.1224, "slope and ridge": 0.1002, "desert": 0.0823, "shelf sea": 0.0758, "deep ocean": 0.0413, "tundra": 0.0149, "lakes and rivers": 0.0115, "wetland": 0.0086, "towns": 0.0064, "bare rock": 0.0009},
 "palette_from": ["taiga", "forest", "grassland"],
 "era": {"name": "Low seas", "what": "Low seas, the Sea of Japan almost cut off", "arrives_years_before_2026": [30100, 30000], "leaves_years_before_2026": [16236, 8136], "account": "The past. With the sea about 120 metres lower, about 300,000 square kilometres of this plate’s seas were dry land, a quarter of them: the shelf around the Korea Strait and Jeju, the Seto Inland Sea, which joined Kyushu, Shikoku and Honshu, and the north of the Tatar Strait, which joined Sakhalin to the mainland. Only shallow straits linked the Sea of Japan to the ocean, and its surface water turned fresher. The land was already dry when the timeline begins; the rising sea drowned most of it between 16,236 and 8,136 years ago. The line that stands for the sea turns to the colour of land, all at once, and only across those spans.", "source": "Lambeck et al. 2014, PNAS 111:15296; Sagawa et al. 2018, Progress in Earth and Planetary Science 5:18; Oba et al. 1991, Paleoceanography 6:499"},
 "history": [{"years_ago": 30000000, "range_years_ago": [31500000, 28500000], "what": "The Baikal rift began to open along this plate's northwest edge.", "source": "Petit and Deverchere 2006, Geochemistry Geophysics Geosystems 7:Q11016, doi:10.1029/2006GC001265"}, {"years_ago": 19500000, "range_years_ago": [23040000, 15980000], "what": "The Sea of Japan opened, pulling the Japanese islands away from mainland Asia.", "source": "Jolivet, Tamaki and Fournier 1994, Journal of Geophysical Research 99:22237, doi:10.1029/93JB03463; ICS International Chronostratigraphic Chart v2024/12 (Cohen et al. 2013, updated), stratigraphy.org"}],
 "outline_lon_lat": [[[131.28, 31.88], [131.72, 31.76], [132.03, 31.48], [132.27, 31.26], [132.58, 30.99], [132.82, 30.75], [132.97, 30.97], [133.2, 31.22], [133.5, 31.52], [134.04, 31.88], [134.69, 32.2], [135.03, 32.33], [135.36, 32.46], [135.61, 32.54], [137.03, 33.05], [137.55, 33.4], [138.07, 33.75], [138.38, 34.06], [138.51, 34.58], [138.67, 35.03], [138.42, 35.36], [138.26, 35.73], [138.12, 36.03], [137.89, 36.31], [137.85, 36.6], [137.9, 37.18], [137.89, 37.86], [137.85, 38.48], [137.77, 38.98], [137.84, 39.4], [138.09, 39.66], [138.35, 39.83], [138.66, 40.07], [138.66, 40.47], [138.76, 40.78], [138.47, 41.1], [138.49, 41.48], [138.74, 41.77], [138.82, 42.0], [138.81, 42.77], [138.8, 43.19], [138.56, 43.94], [138.58, 44.29], [138.85, 44.81], [139.04, 45.41], [139.16, 45.95], [139.37, 46.22], [139.94, 46.52], [140.55, 46.96], [141.18, 47.39], [142.02, 48.05], [142.88, 48.7], [142.76, 49.24], [142.4, 50.86], [142.54, 51.7], [142.69, 52.54], [142.85, 53.38], [142.41, 54.03], [141.28, 54.07], [140.15, 54.1], [139.21, 54.33], [137.92, 54.59], [136.61, 54.83], [135.14, 55.06], [133.65, 55.27], [132.67, 55.49], [131.69, 55.7], [130.75, 55.86], [129.8, 56.01], [128.39, 56.4], [126.96, 56.77], [125.5, 57.13], [124.57, 57.18], [123.64, 57.22], [122.72, 57.25], [121.78, 57.28], [120.85, 57.3], [119.92, 57.32], [119.02, 57.15], [118.13, 56.98], [117.25, 56.8], [116.38, 56.62], [115.02, 56.53], [113.66, 56.42], [112.31, 56.3], [110.92, 56.22], [109.76, 55.76], [109.38, 55.33], [109.0, 54.9], [108.69, 54.15], [108.39, 53.4], [107.71, 53.08], [107.03, 52.76], [106.36, 52.43], [105.7, 52.1], [105.06, 51.76], [104.42, 51.43], [104.9, 50.79], [105.38, 50.14], [105.58, 49.29], [105.78, 48.44], [106.05, 47.38], [106.3, 46.32], [106.61, 45.43], [106.77, 44.99], [107.06, 44.1], [107.2, 43.65], [108.13, 43.15], [109.04, 42.64], [109.69, 42.07], [110.57, 41.6], [111.44, 41.13], [112.29, 40.64], [112.91, 41.02], [113.54, 41.4], [114.39, 41.16], [115.23, 40.92], [115.81, 40.6], [116.38, 40.27], [117.64, 39.84], [118.86, 40.26], [119.85, 40.65], [120.85, 41.04], [121.78, 41.62], [122.73, 42.19], [123.51, 41.53], [124.27, 40.87], [125.02, 40.2], [125.38, 39.28], [125.72, 38.36], [126.1, 36.72], [126.13, 35.62], [126.26, 34.25], [125.52, 33.56], [124.79, 32.87], [124.07, 32.17], [123.36, 31.47], [123.87, 31.33], [124.49, 31.25], [125.03, 31.2], [125.73, 31.2], [126.4, 31.23], [127.05, 31.27], [127.66, 31.36], [128.26, 31.47], [128.81, 31.6], [129.44, 31.79], [129.77, 32.04], [130.84, 31.98], [131.28, 31.88]]],
 "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"
}