Map of Gabbros Area in Delaware in "The Gabbros and Associated Rocks in Delaware" by FD Chester in Bulletin No. 59 of the USGS, 1890. Scale 1"=3miles. Colour print, 9"x11.5"
Map of Gabbros Area in Delaware in "The Gabbros and Associated Rocks in Delaware" by FD Chester in Bulletin No. 59 of the USGS, 1890. Scale 1"=3miles. Colour print, 9"x11.5", folding out from 45 pp report. Colours are 5 shades of brown on black base map. In good condition.