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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAATklEQVQ4jWOJiHArlJAQdWCgAnjx4vUBFpBh/f2FftQwsLCwn4GFgcqAZdRAigEL5UagglEDKQcsVDADBYwaOCLC8MWL1wdAJS01AMgsADEvEfIgMi/HAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "Shakopee Formation",
     "url": "16ac1f0f71e6b14d411edcf9153808dd",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAATklEQVQ4jWPRjYgo5JaQcGCgAvj64sUBFpBhHv39ftQwcEdhIQMLA5UBy6iBFAMWyo1ABaMGUg5YqGAGChg1cESE4dcXLw6ASlpqAJBZAFgrEgxKipptAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "Oneota Dolomite",
     "url": "98c10ef7e1ab813bc75fcd75ec0d497c",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAATklEQVQ4jWOxjYgoFJKQcGCgAnj34sUBFpBhyf39ftQwcG5hIQMLA5UBy6iBFAMWyo1ABaMGUg5YqGAGChg1cESE4bsXLw6ASlpqAJBZAOapEfq7+XRZAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "Oo"
     ]
    },
    {
     "label": "Jordan Sandstone",
     "url": "38bf995232769243bfa757f8d965aa00",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAATklEQVQ4jWOJiGAolJBgcGCgAnjxguEAC8iw/n4GP2oYWFjIwMDCQGXAMmogxYCFciNQwaiBlAMWKpiBAkYNHBFh+OIFwwFQSUsNADILAKayDTLCfm0hAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "Cj"
     ]
    },
    {
     "label": "St. Lawrence Formation",
     "url": "78b046514747c57c508fb00580546a40",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAATklEQVQ4jWOxjdAtFJLgdmCgAnj34usBFpBhyf0eftQwcG7hDgYWBioDllEDKQYslBuBCkYNpBywUMEMFDBq4IgIw3cvvh4AlbTUACCzAIn1EiN3PrENAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "Lone Rock Formation",
     "url": "e45ffcbaa5177888507f59ee1447a407",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAATklEQVQ4jWPxj2AoFJNgcGCgAnj1guEAC8iwhn4GP2oY2FDIwMDCQGXAMmogxYCFciNQwaiBlAMWKpiBAkYNHBFh+OoFwwFQSUsNADILAGIXDTqjO0MlAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "Wonewoc Sandstone",
     "url": "1e4e736a981349c576c78e9136747f1d",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAATklEQVQ4jWOJiNAtlJDgdmCgAnjx4usBFpBh/f0eftQwsLBwBwMLA5UBy6iBFAMWyo1ABaMGUg5YqGAGChg1cESE4YsXXw+ASlpqAJBZAFfZEgx8CYmjAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "Eau Claire Fm",
     "url": "8fd709dd52caa0ae88469cdfcece4b81",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAATklEQVQ4jWPxj9AtFJPgdmCgAnj14usBFpBhDf0eftQwsKFwBwMLA5UBy6iBFAMWyo1ABaMGUg5YqGAGChg1cESE4asXXw+ASlpqAJBZABM+EhQbLfGNAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "Ce"
     ]
    },
    {
     "label": "Mount Simon Sandstone",
     "url": "1154a9d535a317e79d1d58f5d01dfb8b",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAATklEQVQ4jWOJcNQtlBDhdmCgAnjx5usBFpBh/VkeftQwsHDaDgYWBioDllEDKQYslBuBCkYNpBywUMEMFDBq4IgIwxdvvh4AlbTUACCzAK7/Eh7eZZiDAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "Cm"
     ]
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "PALEOZOIC ROCKS"
    }
   ]
  }
 ]
}