It is not the purpose of this article to attempt to give anything approaching a complete account of the minerals of this very prolific region; there is already available a 250-page publication in which they are fully described.1 But it seems well worth while to outline what the mineralogist who can spend but a few days in the Black Hills may reasonably hope to find, according to the writer’s experience, covering about a week early in May, 1917, collecting for the National Museum. The best time of year to make such a trip is probably the month of June, after all chance of heavy snow is over—several inches fell during the writer’s visit—and before the hot dry weather of late summer sets in.
1“The mineralg of the Black Hills,” Victor Ziegler, S. Dak. Sch, Mhtcs, Bull. 10, Dept. Min. Geol., Rapid City, 1914.