{
  "version": "1.0",
  "coordinate system":{"model":"cartesian"},
  "cross section":[[0,200e3],[100e3,200e3]],
  "features":
  [
    {"model":"mantle layer", "name":"upper mantle", "min depth":100e3, "max depth":660e3,
       "coordinates":[[0,0],[0,1000e3],[2000e3,1000e3],[2000e3,0]],
       "composition models":[{"model":"uniform", "compositions":[4]}]},

    {"model":"oceanic plate", "name":"Overriding plate", "max depth":100e3,
       "coordinates":[[0,0],[0,1000e3],[1500e3,1000e3],[1600e3,350e3],[1500e3,0]],
       "temperature models":[{"model":"plate model", "max depth":100e3, "spreading velocity":0.01,
                              "ridge coordinates":[[[400e3,-1],[-100e3,2000e3]]]}],
       "composition models":[{"model":"uniform", "compositions":[0], "max depth":100e3}]},

    {"model":"oceanic plate", "name":"Atlantic Plate", "max depth":100e3,
       "coordinates":[[2000e3,0],[2000e3,1000e3],[1500e3,1000e3],[1600e3,350e3],[1500e3,0]],
       "temperature models":[{"model":"linear", "max depth":100e3}],
       "composition models":[{"model":"uniform", "compositions":[3], "max depth":50e3},
                             {"model":"uniform", "compositions":[1], "min depth":50e3}]},

    {"model":"subducting plate", "name":"Slab",
       "coordinates":[[1500e3,1000e3],[1600e3,350e3],[1500e3,0]],
       "dip point":[0,0],
       "segments":[{"length":300e3, "thickness":[100e3], "angle":[0,60],
                   "composition models":[{"model":"uniform", "compositions":[3], "max distance slab top":50e3},
                                        {"model":"uniform", "compositions":[2], "min distance slab top":50e3}]},
                   {"length":500e3, "thickness":[100e3], "angle":[60,20]}],
       "sections":[
         {"coordinate":0,
        "segments":[{"length":300e3, "thickness":[100e3], "angle":[0,60]},
                    {"length":400e3, "thickness":[100e3,50e3], "angle":[60]}],
         "composition models":[{"model":"uniform", "compositions":[1]}]}
       ],
       "temperature models":[{"model":"plate model", "density":3300, "plate velocity":0.02 }],
       "composition models":[{"model":"uniform", "compositions":[2], "max distance slab top":100e3}]}
  ]
}
