<terrainPatchMakers>
      <li>
        <perlinFrequency>0.04</perlinFrequency>
        <thresholds>
          <li>
            <terrain>MarshyTerrain</terrain>
            <min>0.7</min>
            <max>999</max>
          </li>
        </thresholds>
      </li>
      <li>
        <perlinFrequency>0.035</perlinFrequency>
        <thresholds>
          <li>
            <terrain>MarshyTerrain</terrain>
            <min>0.64</min>
            <max>0.87</max>
          </li>
          <li>
            <terrain>Marsh</terrain>
            <min>0.87</min>
            <max>999</max>
          </li>
        </thresholds>
      </li>
    </terrainPatchMakers>