COLORADO

Table 1 identifies the USGS 7.5 minute quadrangles (1:24,000 scale topographic maps) which surround the area containing the physiographic features Rio Grande Pyramid and La Ventana. Both of these features are readily visible in the larger version of the photograph on the first page of the tale of La Ventana, reproduced again below.

The 7.5 minute quads named in Table 1 can be found in the 37107 block of the United States Geological Survey "COLORADO - Index to Topographic and Other Map Coverage" (publication number 39104-F8-MI-99x) available from the United States Geological Survey, Reston, VA.

click for larger image

The enlargement below (Table 2), derived from the central quad of Table 1 (Rio Grande Pyramid), shows the physiographic features La Ventana ("The Window") and the Rio Grande Pyramid summit. These two landmarks are clearly visible if you click the photograph above, and are reported to be visible from the portal of the mine.

We would like to thank the USGS for the Digital Raster Graphics ("DRG") which make up the mosaics in the table below.