Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN><SPAN>This layer interprets materials testing results that were available at the time of analysis for each project area. Aggregate samples from test sites were tested at materials testing labs for strength and durability qualities. The Los Angeles (LA) Abrasion and the Washington Degradation tests are two methods that labs use to assess if an aggregate material will perform as needed for a variety of aggregate products. Rock materials that break down too much during the testing process will not pass these types of tests.</SPAN></SPAN></P></DIV></DIV></DIV>
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN><SPAN>This layer represents surface mining point locations used at the time of analysis for each publication’s project area. These features were sourced from WGS’s Surface Mine Reclamation Program’s (SMRP) database, historical U. S. Geological Survey (USGS) topographic maps, lidar, aerial imagery, and other available sources.</SPAN></SPAN></P></DIV></DIV></DIV>
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN><SPAN>The polygons in this layer represent the aggregate resource inventory. Demonstrated, Inferred, and Speculative classifications indicate where aggregate resources may be found, while the Not a Resource classification indicates where aggregate resources may not be found. In general, our data is intended to be used at no finer a scale than 1:24,000.</SPAN></SPAN></P></DIV></DIV></DIV>
Description: <DIV STYLE="text-align:Left;"><P STYLE="font-size:16ptmargin:7 0 7 0;"><SPAN STYLE="font-size:12pt">This layer shows the extent of each aggregate mapping study and provides a link to download the related publication.</SPAN></P><DIV><DIV><P><SPAN /></P></DIV></DIV></DIV>