Add to ORKGOutside the region covered by this paper, the most notable exposure of this formation occurs at Crawfordsville, Indiana, where its thickness is said to be two hundred and eighty feet. South of the Iowa line, exposures occur along the Mississippi in limited areas, and southwestward in Missouri, yielding most of the lead in that region
While on a hasty visit to Jackson county, Iowa, this summer, I was taken, by the kindness of Hon. C....
The object of this paper is to give the results of field observation and paleontologic study of the ...
For several reasons the section of Cretacic strata in northwestern Iowa is of especial interest. It ...
Some years since a portion of supposed fossil wood was obtained from an eighteen inch limestone laye...
Six species of Agaricocrinus obtained from the Keokuk beds, of which three, viz: A. americanus Roeme...
Most who examined the rocks along the Missouri River in the region under consideration have been con...
I handed in the subject of this paper, intending to throw together various notes which have been acc...
The record of this well is of special importance because it supplements and corrects the published r...
While making a study of the Keokuk beds in southeastern Iowa during the field season of 1911, the wr...
The sandstones under consideration lie in old gorges in Devonian limestone a short distance north of...
In his report on the geology of Lee county Keyes described a fine-grained, compact limestone at the ...
A layer of Wisconsin drift ranging up to 150 feet in thickness mantles the better part of the bedroc...
The cretaceous deposits of Woodbury and Plymouth Counties are composed of sandstones, shales and cer...
The section is located on the line of the Wabash railway about two miles below the little station of...
At the time of the meeting of the Iowa Academy of Science at Drake University, Des Moines, in April,...
While on a hasty visit to Jackson county, Iowa, this summer, I was taken, by the kindness of Hon. C....
The object of this paper is to give the results of field observation and paleontologic study of the ...
For several reasons the section of Cretacic strata in northwestern Iowa is of especial interest. It ...
Some years since a portion of supposed fossil wood was obtained from an eighteen inch limestone laye...
Six species of Agaricocrinus obtained from the Keokuk beds, of which three, viz: A. americanus Roeme...
Most who examined the rocks along the Missouri River in the region under consideration have been con...
I handed in the subject of this paper, intending to throw together various notes which have been acc...
The record of this well is of special importance because it supplements and corrects the published r...
While making a study of the Keokuk beds in southeastern Iowa during the field season of 1911, the wr...
The sandstones under consideration lie in old gorges in Devonian limestone a short distance north of...
In his report on the geology of Lee county Keyes described a fine-grained, compact limestone at the ...
A layer of Wisconsin drift ranging up to 150 feet in thickness mantles the better part of the bedroc...
The cretaceous deposits of Woodbury and Plymouth Counties are composed of sandstones, shales and cer...
The section is located on the line of the Wabash railway about two miles below the little station of...
At the time of the meeting of the Iowa Academy of Science at Drake University, Des Moines, in April,...
While on a hasty visit to Jackson county, Iowa, this summer, I was taken, by the kindness of Hon. C....
The object of this paper is to give the results of field observation and paleontologic study of the ...
For several reasons the section of Cretacic strata in northwestern Iowa is of especial interest. It ...