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     "values": [
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     "url": "7b9aafc37e1644d6b1d53145b8632310",
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     "contentType": "image/png",
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     "values": [
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     "label": "Od - Decorah Shale",
     "url": "fd65d16351db1d0d037defc5f0f07614",
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    {
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     "values": [
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     "contentType": "image/png",
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     "values": [
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     "contentType": "image/png",
     "height": 20,
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     "values": [
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     "contentType": "image/png",
     "height": 20,
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     "values": [
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    {
     "label": "Os - St. Peter Sandstone",
     "url": "aa1c25033dc9289e4148ffaa18b64e5a",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADFJREFUOI1jYaAyYKGZgS/+73WgxCAJRucDKAZSC4waOGrgqIGjBtLZQFh5RjUDqQUAD3kFbW5+vCwAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
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    },
    {
     "label": "Op - Prairie Du Chien Group",
     "url": "e4725f128361884bfcc03d2f984c4aed",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADFJREFUOI1jYaAyYKGZgaUP/jtQYlC3AuMBFAOpBUYNHDVw1MBRA+lsIKw8o5qB1AIAK64FvXgJvCYAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
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    },
    {
     "label": "Ops - Shakopee",
     "url": "93a371299b24275ae06d993fdb2d8f63",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADFJREFUOI1jYaAyYKGZgXtf/HegxCBnCcYDKAZSC4waOGrgqIGjBtLZQFh5RjUDqQUAD+YFbbU9G0YAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
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    {
     "label": "Opo - Oneota Dolomite",
     "url": "d05a7df6db54d3b287c73f373fe0d7e2",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADFJREFUOI1jYaAyYKGZgaWb/ztQYlC3L+MBFAOpBUYNHDVw1MBRA+lsIKw8o5qB1AIAOyYF6rTA5TwAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
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     "values": [
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    {
     "label": "Cj - Jordan Sandstone",
     "url": "b03756f75dea03f9c9b337aaca3921ac",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADFJREFUOI1jYaAyYKGZgf//sztQYhAj488DKAZSC4waOGrgqIGjBtLZQFh5RjUDqQUARVQGDGFmGI4AAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
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     "values": [
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    {
     "label": "Cs - St. Lawrence",
     "url": "50936555fa54ad09dc0dcb96991013dc",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADFJREFUOI1jYaAyYKGZgSql7A6UGHSn++cBFAOpBUYNHDVw1MBRA+lsIKw8o5qB1AIAwOcHcaIw0YEAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
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     "values": [
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    {
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     "url": "91da80e4956d7af7882c163eef0a6b39",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADFJREFUOI1jYaAyYKGZgYGl7A6UGLS+++cBFAOpBUYNHDVw1MBRA+lsIKw8o5qB1AIAsUIHRLXuefUAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
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    },
    {
     "label": "Ct - Tunnel City Group",
     "url": "017373beda4a161fff68493930cb6325",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADFJREFUOI1jYaAyYKGZgcYr2R0oMehs+M8DKAZSC4waOGrgqIGjBtLZQFh5RjUDqQUAqdAHLp07rkUAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
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    },
    {
     "label": "Clr - Lone Rock",
     "url": "017373beda4a161fff68493930cb6325",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADFJREFUOI1jYaAyYKGZgcYr2R0oMehs+M8DKAZSC4waOGrgqIGjBtLZQFh5RjUDqQUAqdAHLp07rkUAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
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    },
    {
     "label": "Cw - Wonewoc Sandstone",
     "url": "cf76108edb14cff8e6f394be19c5f908",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADFJREFUOI1jYaAyYKGZgf8v1zlQYhCjbtMBFAOpBUYNHDVw1MBRA+lsIKw8o5qB1AIALAMFwaXfmycAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
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     "values": [
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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADFJREFUOI1jYaAyYKGZgf8v1zlQYhCjbtMBFAOpBUYNHDVw1MBRA+lsIKw8o5qB1AIALAMFwaXfmycAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
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    },
    {
     "label": "Ce - Eau Claire",
     "url": "0a3d38154c72961ef2b52e7286ac1b26",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADFJREFUOI1jYaAyYKGZgSqB7A6UGHRn/c8DKAZSC4waOGrgqIGjBtLZQFh5RjUDqQUAzUcHlSSZdAUAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
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    },
    {
     "label": "Cm - Mt. Simon Sandstone",
     "url": "b91f0338aa1ef2f5b71c98bd730422e5",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADFJREFUOI1jYaAyYKGZgf9XsjtQYhBj+M8DKAZSC4waOGrgqIGjBtLZQFh5RjUDqQUAYuQGYuae8bQAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
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    }
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}