Hollowed Ground: Copper Mining and Community Building on Lake Superior, 1840s-1990s

این کتاب مرجعی متمرکز و کاربردی درباره «Hollowed Ground: Copper Mining and Community Building on Lake Superior, 1840s-1990s» در حوزه «زمین‌شناسی، اکتشاف و معدن‌کاری مس» است. محتوا به هدف‌گذاری اکتشاف و مدل کانسار می‌پردازد. برای تفسیر کانسار، هدف‌گذاری اکتشاف، ارزیابی ذخیره و تصمیم‌گیری زمین‌شناسی مفید است.

In "Hollowed Ground", author Larry Lankton tells the story of two copper industries on Lake Superior - native copper mining, which produced about 11 billion pounds of the metal from the 1840s until the late 1960s, and copper sulfide mining, which began in the 1950s and produced another 4.4 billion pounds of copper through the 1990s. While this book covers the history of the entire Lake Superior mining industry, it particularly focuses on the three biggest, most important, and longest-lived companies: Calumet & Hecla, Copper Range, and Quincy.