Add to ORKGA few months ago, in making some improvements in the roadbed of the Chicago & Northwestern Railroad, a deep cut was made in a hill about three miles west of the city of Toledo, in Tama county, Iowa, where the following section was exposed
The work of Professor Shimek, of the Iowa Geological Survey, in western Iowa, has brought to light m...
In the early spring of 1921 as the writer was examining the face of the bluff bounding the north sid...
About three miles east of Independence, Iowa, there are cross-bedded, water-laid deposits of sand an...
A few months ago, in making some improvements in the roadbed of the Chicago & Northwestern Railroad,...
The southern margin of the main Iowan drift sheet extends in a sinuous line across the central porti...
Just outside the limits of the growing town of Oelwein, Iowa, to the southeast, the Chicago Great We...
Many new exposures have been made by the Chicago, Milwaukee and St. Paul Railway in the reconstructi...
The Iowan till is not known to be present in Story County. The trend of its southwestern margin whic...
This paper is the result of an attempt to determine, if possible, the relation of the Wisconsin drif...
At the last meeting of the Academy I called attention to an extension of the Wisconsin drift south, ...
During the past summer the author made a series of observations, at the request of Prof. S. Calvin, ...
McGhee, in the map accompanying his Pleistocene History of Northeastern Iowa, makes the Upper Till ...
There is in eastern Iowa one short journey which shows a more interesting variety of land forms in s...
Remnants of Nebraskan drift, as recently exposed capping a high Mississippi River bluff in the city ...
Workmen digging a well at the elevator during April, 1896, came to a forest bed at a depth of eighty...
The work of Professor Shimek, of the Iowa Geological Survey, in western Iowa, has brought to light m...
In the early spring of 1921 as the writer was examining the face of the bluff bounding the north sid...
About three miles east of Independence, Iowa, there are cross-bedded, water-laid deposits of sand an...
A few months ago, in making some improvements in the roadbed of the Chicago & Northwestern Railroad,...
The southern margin of the main Iowan drift sheet extends in a sinuous line across the central porti...
Just outside the limits of the growing town of Oelwein, Iowa, to the southeast, the Chicago Great We...
Many new exposures have been made by the Chicago, Milwaukee and St. Paul Railway in the reconstructi...
The Iowan till is not known to be present in Story County. The trend of its southwestern margin whic...
This paper is the result of an attempt to determine, if possible, the relation of the Wisconsin drif...
At the last meeting of the Academy I called attention to an extension of the Wisconsin drift south, ...
During the past summer the author made a series of observations, at the request of Prof. S. Calvin, ...
McGhee, in the map accompanying his Pleistocene History of Northeastern Iowa, makes the Upper Till ...
There is in eastern Iowa one short journey which shows a more interesting variety of land forms in s...
Remnants of Nebraskan drift, as recently exposed capping a high Mississippi River bluff in the city ...
Workmen digging a well at the elevator during April, 1896, came to a forest bed at a depth of eighty...
The work of Professor Shimek, of the Iowa Geological Survey, in western Iowa, has brought to light m...
In the early spring of 1921 as the writer was examining the face of the bluff bounding the north sid...
About three miles east of Independence, Iowa, there are cross-bedded, water-laid deposits of sand an...