1922/06/01 by Waldemar Lindgren · 2 citations
Engineering · #Mining and Gasification Technologies
paper · doi:10.2113/gsecongeo.17.4.292
openalex publication_date 1922/06/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
A number of years ago I suggested that the ores which have been deposited by hot ascending waters fall naturally in three classes dependent upon the phys!cal conditions surrounding their genesis.2 Later on, this mode of subdivision was introduced in a textbook on "Mineral Deposits ,,a and it has since been adopted by other authors.4 It was recognized from the start that the various classes were not sharply defined but gradually merged.On the other hand, the principle of classification seemed the only one suitable for a genetic system.• It was also evident that the