Add to ORKGTerranes older than those of Paleozoic age occupy in Iowa a very small area. Attention which has been bestowed upon them is about commensurate with their relative surface extent. Heretofore, little attempt has been made to determine their broader stratigraphic relationships, their real position in the general geological column, their possible subdivision, or their role in the geotectonics of the region. It has seemed all sufficient to merely note their existence in the extreme northwest corner of the state. Yet, these very rocks now appear to have a history longer, more complicated and more vicissitudinous than any other terrane represented within our borders
It is a fact almost too well known to state here that the most important single problem in earth-stu...
Steep slopes, varied slope aspects, and entrenched stream valleys carved into Paleozoic-age rocks pr...
For several reasons the section of Cretacic strata in northwestern Iowa is of especial interest. It ...
Terranes older than those of Paleozoic age occupy in Iowa a very small area. Attention which has bee...
Sioux quartzite, granite, and schistose metamorphic rocks have been recognized in the pre-Cambrian. ...
Includes bibliographical references.Includes illustrations and maps.Samples from five cores plus sup...
To many of the delegates to the Twelfth International Geological Congress who listened to the papers...
During the summer of 1915 it was the privilege of the writer to work on the geology of the Sparta qu...
Recent marked tendency shown in Europe especially to give taxonomic rank comparable to geological pe...
Presentation and discussion of a classification of Cambrian, Ordovician, and Silurian strata recentl...
Masses of rock strongly resembling pebbles and boulders of granite occur in the pre-Cambrian sedimen...
The sandstones under consideration lie in old gorges in Devonian limestone a short distance north of...
Rocks from a buried igneous body, herein called the Otter Creek layered igneous complex, were recove...
It is a fact almost too well known to state here that the most important single problem in earth-stu...
Steep slopes, varied slope aspects, and entrenched stream valleys carved into Paleozoic-age rocks pr...
For several reasons the section of Cretacic strata in northwestern Iowa is of especial interest. It ...
Terranes older than those of Paleozoic age occupy in Iowa a very small area. Attention which has bee...
Sioux quartzite, granite, and schistose metamorphic rocks have been recognized in the pre-Cambrian. ...
Includes bibliographical references.Includes illustrations and maps.Samples from five cores plus sup...
To many of the delegates to the Twelfth International Geological Congress who listened to the papers...
During the summer of 1915 it was the privilege of the writer to work on the geology of the Sparta qu...
Recent marked tendency shown in Europe especially to give taxonomic rank comparable to geological pe...
Presentation and discussion of a classification of Cambrian, Ordovician, and Silurian strata recentl...
Masses of rock strongly resembling pebbles and boulders of granite occur in the pre-Cambrian sedimen...
The sandstones under consideration lie in old gorges in Devonian limestone a short distance north of...
Rocks from a buried igneous body, herein called the Otter Creek layered igneous complex, were recove...
It is a fact almost too well known to state here that the most important single problem in earth-stu...
Steep slopes, varied slope aspects, and entrenched stream valleys carved into Paleozoic-age rocks pr...
For several reasons the section of Cretacic strata in northwestern Iowa is of especial interest. It ...