Add to ORKGIowa\u27s mid-continental location has made its area one of the last to be reached by the successive marine invasions from the Cambrian on. A quantitative study of the length of post-Cambrian time during which Iowa has been land versus the length of time it has been more or less a sea floor is offered
The gravels related to the Iowan glaciation of northeastern Iowa have been studied in the field and ...
The several major and many more minor recessional moraines are discussed with respect to their locat...
It is a fact almost too well known to state here that the most important single problem in earth-stu...
Iowa\u27s mid-continental location has made its area one of the last to be reached by the successive...
Iowa and the upper Mississippi basin are, as is now quite generally known, in possession of the most...
The first centennary of a science in Iowa is upon us. History of the sciences in the commonwealth no...
In Geology of Iowa: Over Two Billion Years of Change, author Wayne I. Anderson presents a chronologi...
The most important geological discovery in Iowa in recent years is the revelation that our Devonic d...
The long period intervening between the deposit of the Cretaceous rocks of Iowa and the advent of th...
Evidence was presented that The Hertha extends further east than has heretofore been reported
Immediately following the time that the Altamont moraine was formed there was an intermittent retrea...
Of late, stratigraphic taxonomy and correlation take on new trend from that to which the last genera...
These microfossils were found in screenings obtained by washing some marly shales from the Cerro Gor...
During the summer of 1915 it was the privilege of the writer to work on the geology of the Sparta qu...
When the present Iowa Geological Survey first began operations, 30 odd years ago, one of the surpris...
The gravels related to the Iowan glaciation of northeastern Iowa have been studied in the field and ...
The several major and many more minor recessional moraines are discussed with respect to their locat...
It is a fact almost too well known to state here that the most important single problem in earth-stu...
Iowa\u27s mid-continental location has made its area one of the last to be reached by the successive...
Iowa and the upper Mississippi basin are, as is now quite generally known, in possession of the most...
The first centennary of a science in Iowa is upon us. History of the sciences in the commonwealth no...
In Geology of Iowa: Over Two Billion Years of Change, author Wayne I. Anderson presents a chronologi...
The most important geological discovery in Iowa in recent years is the revelation that our Devonic d...
The long period intervening between the deposit of the Cretaceous rocks of Iowa and the advent of th...
Evidence was presented that The Hertha extends further east than has heretofore been reported
Immediately following the time that the Altamont moraine was formed there was an intermittent retrea...
Of late, stratigraphic taxonomy and correlation take on new trend from that to which the last genera...
These microfossils were found in screenings obtained by washing some marly shales from the Cerro Gor...
During the summer of 1915 it was the privilege of the writer to work on the geology of the Sparta qu...
When the present Iowa Geological Survey first began operations, 30 odd years ago, one of the surpris...
The gravels related to the Iowan glaciation of northeastern Iowa have been studied in the field and ...
The several major and many more minor recessional moraines are discussed with respect to their locat...
It is a fact almost too well known to state here that the most important single problem in earth-stu...