I'LL MARK brainliest Map of Europe. A key notes Railroads in 1850 (purple lines), Centers of industry (black dots), Iron ore deposits (green dots), and Coal and lignite deposits (red dots). A second key notes Percent of population in cities of over 100,000 with three different shades. France, Germany, and northern Europe have 20 percent or more of cities with over 100,000 people. According to the map, most industrialization in Europe occurred in the . The production of was profitable throughout western Europe. The building of helped transport goods throughout Europe. According to the map, the population trend indicates that more people are moving into