Year: 1915 / Place: Illinois / Publisher: State Geological Survey (Urbana, Ill.) - GeoBlacklight Search Results

Start Over Year 1915 Place Illinois Publisher State Geological Survey (Urbana, Ill.)

1. Illinois (La Salle County), Ottawa quadrangle : topography.

1915. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1912.";"Surveyed in cooperation with the State of Illinois.";Relief shown by contours and spot heights.;1 ma... Geological Survey (U.S.) and State Geological Survey (Urbana, Ill.).

2. Illinois-Missouri, Chester quadrangle : topography

1915. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1912-1913.";"Surveyed in cooperation with the State of Illinois.";Relief shown by contours.;1 map, colored;4... Geological Survey (U.S.) and State Geological Survey (Urbana, Ill.).