Add to ORKGThe stratigraphy and structure of the Wisconsin Zinc and Lead District are remarkably simple; so simple in fact that one is liable to under estimate their importance in relation to the ore deposits. But four formations are of interest to one operating in this district, all of which are Ordovician in age and which in ascending order are, - the St. Peter sandstone, the Platteville limestone, the Galena dolomite, and the Maquoketa shale --Geology - Stratigraphy - General, page 1
The object of this report has been three-fold. First, it has been deemed necessary to discuss the ge...
The more or less impure iron bearing mineral occurs mixed with a very tenacious clay, in which are a...
This report includes the results of geological investigation of the Clinton Mining District and the ...
The stratigraphy and structure of the Wisconsin Zinc and Lead District are remarkably simple; so sim...
At the present time the greater portion of the zinc mined in the Joplin District, is taken from what...
In conclusion, summing up the evidence both field and theoretic, there are very good reasons for bel...
The lateral variation and nature of carbonate host rock in the Upper Mississippi Valley zinc-lead di...
One of the oldest mining districts in the United States, and one from which lead and zinc ores were ...
The purpose of this study is the application of the principles of mining geology to a search for add...
This mine, which is located about 3-1/2 miles southeast of Sullivan in the extreme northeast corner ...
The present generation has seen many changes in all phases of human endeavor, and the changes which ...
The Mineral Creek sulfide deposits are located in Allamakee County, Iowa on the extreme northwest fr...
In the Upper Mississippi Valley for a considerable period after the mines began to be operated much ...
In its geographic and geologic relations this area forms a part of the Appalachian province, which e...
Mining operations of the zinc and lead deposits of Southwest Missouri, Southeast Kansas and Northeas...
The object of this report has been three-fold. First, it has been deemed necessary to discuss the ge...
The more or less impure iron bearing mineral occurs mixed with a very tenacious clay, in which are a...
This report includes the results of geological investigation of the Clinton Mining District and the ...
The stratigraphy and structure of the Wisconsin Zinc and Lead District are remarkably simple; so sim...
At the present time the greater portion of the zinc mined in the Joplin District, is taken from what...
In conclusion, summing up the evidence both field and theoretic, there are very good reasons for bel...
The lateral variation and nature of carbonate host rock in the Upper Mississippi Valley zinc-lead di...
One of the oldest mining districts in the United States, and one from which lead and zinc ores were ...
The purpose of this study is the application of the principles of mining geology to a search for add...
This mine, which is located about 3-1/2 miles southeast of Sullivan in the extreme northeast corner ...
The present generation has seen many changes in all phases of human endeavor, and the changes which ...
The Mineral Creek sulfide deposits are located in Allamakee County, Iowa on the extreme northwest fr...
In the Upper Mississippi Valley for a considerable period after the mines began to be operated much ...
In its geographic and geologic relations this area forms a part of the Appalachian province, which e...
Mining operations of the zinc and lead deposits of Southwest Missouri, Southeast Kansas and Northeas...
The object of this report has been three-fold. First, it has been deemed necessary to discuss the ge...
The more or less impure iron bearing mineral occurs mixed with a very tenacious clay, in which are a...
This report includes the results of geological investigation of the Clinton Mining District and the ...