Add to ORKGThe Sioux quartzite is a formation made up of hard, flinty beds, of considerable thickness and extent, which are exposed principally along the Sioux River, in southeastern Dakota, southwestern Minnesota and northwestern Iowa. It is of particular interest to Iowans, for the reason it has been usually regarded as the most ancient geological formation occurring within the limits of the state-older than the lead-bearing rocks of northeastern Iowa, and older than the Cambrian sandstones which lie at the base of the Mississippi bluffs in the extreme corner of the state
Except they be trained geologists few Iowans there are who would ordinarily think of looking for mou...
Quartzites from quarries at Flint Hill, South Dakota and Spanish Diggings, Wyoming were examined usi...
The lithology of certain Benton (?) strata in Lyon County and adjacent parts of Minnehaha County, So...
The Sioux quartzite is a formation made up of hard, flinty beds, of considerable thickness and exten...
In the extreme north western corner of Iowa there is a small area of very hard, thoroughly vitreous ...
The lower Proterozoic Sioux Quartzite is exposed at several localities within an east-trending area...
The sandstones under consideration lie in old gorges in Devonian limestone a short distance north of...
This study comprises the areal geology, and geography of a unique area that extends over a distance ...
Bottle Mountain east of Hot Springs, South Dakota is the traditional last fortress of the Indian tri...
Proterozoic quartzite is exposed at several isolated localities within an area of nearly 13,000 squa...
The first centennary of a science in Iowa is upon us. History of the sciences in the commonwealth no...
The Sioux quartzite is exposed in this state only in the extreme northwestern corner of Lyon County....
Of all of Iowa\u27s geological formations the Dodge gypsum has held out longest and most resolutely ...
Previous investigations in Pleistocene geology in Iowa have resulted in the development of the conce...
In 1975 on the occasion of the first one hundred years of the Iowa Academy of Science, Robert W. Han...
Except they be trained geologists few Iowans there are who would ordinarily think of looking for mou...
Quartzites from quarries at Flint Hill, South Dakota and Spanish Diggings, Wyoming were examined usi...
The lithology of certain Benton (?) strata in Lyon County and adjacent parts of Minnehaha County, So...
The Sioux quartzite is a formation made up of hard, flinty beds, of considerable thickness and exten...
In the extreme north western corner of Iowa there is a small area of very hard, thoroughly vitreous ...
The lower Proterozoic Sioux Quartzite is exposed at several localities within an east-trending area...
The sandstones under consideration lie in old gorges in Devonian limestone a short distance north of...
This study comprises the areal geology, and geography of a unique area that extends over a distance ...
Bottle Mountain east of Hot Springs, South Dakota is the traditional last fortress of the Indian tri...
Proterozoic quartzite is exposed at several isolated localities within an area of nearly 13,000 squa...
The first centennary of a science in Iowa is upon us. History of the sciences in the commonwealth no...
The Sioux quartzite is exposed in this state only in the extreme northwestern corner of Lyon County....
Of all of Iowa\u27s geological formations the Dodge gypsum has held out longest and most resolutely ...
Previous investigations in Pleistocene geology in Iowa have resulted in the development of the conce...
In 1975 on the occasion of the first one hundred years of the Iowa Academy of Science, Robert W. Han...
Except they be trained geologists few Iowans there are who would ordinarily think of looking for mou...
Quartzites from quarries at Flint Hill, South Dakota and Spanish Diggings, Wyoming were examined usi...
The lithology of certain Benton (?) strata in Lyon County and adjacent parts of Minnehaha County, So...