. The copper-bearing rocks of lake Superior / by Roland Duer Irving. Geology; Geology; Copper ores; Copper ores. 300 COPPEE-BEARING EOCKS OP LAKE SUPEEIOE. due north, and to the east of it changing gradually more towards the N. N. E. The coast line is trending here as a whole just about N. E., but subordinately it gives a number of long trends corresponding to the more northerly trend of the rocks, as shown in Fig. 17. Until this unusual amount of northing. Fig. 17.—Sketch-map of rock exposures near Split Rock River, Minnesota coast, T. 54, R. H W. in the strike is realized the exposures in th
. The copper-bearing rocks of lake Superior / by Roland Duer Irving. Geology; Geology; Copper ores; Copper ores. 300 COPPEE-BEARING EOCKS OP LAKE SUPEEIOE. due north, and to the east of it changing gradually more towards the N. N. E. The coast line is trending here as a whole just about N. E., but subordinately it gives a number of long trends corresponding to the more northerly trend of the rocks, as shown in Fig. 17. Until this unusual amount of northing. Fig. 17.—Sketch-map of rock exposures near Split Rock River, Minnesota coast, T. 54, R. H W. in the strike is realized the exposures in this vicinity are confusing. The following is the succession of strata roughly made out for some four miles along the coast in the neighborhood of Split Rock River. There are prob- ably some gaps in the succession, and the thicknesses given are only the roughest approximations. Nevertheless, the section in its general features is correct, and will well illustrate the nature of the lower beds of this group. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Irving, Roland Duer, 1847-1888. Washington, Govt. Print. Off.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectgeology, bookyear1883
