Add to ORKGIn a report recently made to the State Geological Survey, the writer communicates in detail some facts regarding the brecciated zone of the Devonian in Linn county, Iowa, and the terranes subjacent. The following is in part a brief summary of this report
Until recently little definite information has been accessible concerning the distribution and subdi...
At Bertram in Linn county and at Canton in Jackson county are found deposits of sandstone, shale and...
These microfossils were found in screenings obtained by washing some marly shales from the Cerro Gor...
In a report recently made to the State Geological Survey, the writer communicates in detail some fac...
The great Devonic limestone succession in Iowa was long treated as if it were a single stratigraphic...
This paper is a renewal of a practice carried on by L. W. Wood in the 1930s, that of presenting each...
A recently discovered exposure of fossiliferous beds of Upper Devonian age in Iowa County, Iowa, con...
The Independence shale, the earliest named formation of the Iowa Devonian, was described in 1878 by ...
In examining the rock exposures in a quarry near the village of Robins, Linn County, Iowa, Mr. R. B....
The most important geological discovery in Iowa in recent years is the revelation that our Devonic d...
This is the first of a two-part report dealing primarily with the Devonian strata in the subsurface ...
In the process of road-making west of Middle Amana, in 1931, the grader exposed the country rock ben...
Recent quarry operations at Glory (N. E. ¼ Sec. 36 Spring Creek Twp., Black Hawk County, about 6 mil...
The Devonian System, in Iowa, is exposed in a belt about 50 miles wide extending along a line from M...
Until recently little definite information has been accessible concerning the distribution and subdi...
At Bertram in Linn county and at Canton in Jackson county are found deposits of sandstone, shale and...
These microfossils were found in screenings obtained by washing some marly shales from the Cerro Gor...
In a report recently made to the State Geological Survey, the writer communicates in detail some fac...
The great Devonic limestone succession in Iowa was long treated as if it were a single stratigraphic...
This paper is a renewal of a practice carried on by L. W. Wood in the 1930s, that of presenting each...
A recently discovered exposure of fossiliferous beds of Upper Devonian age in Iowa County, Iowa, con...
The Independence shale, the earliest named formation of the Iowa Devonian, was described in 1878 by ...
In examining the rock exposures in a quarry near the village of Robins, Linn County, Iowa, Mr. R. B....
The most important geological discovery in Iowa in recent years is the revelation that our Devonic d...
This is the first of a two-part report dealing primarily with the Devonian strata in the subsurface ...
In the process of road-making west of Middle Amana, in 1931, the grader exposed the country rock ben...
Recent quarry operations at Glory (N. E. ¼ Sec. 36 Spring Creek Twp., Black Hawk County, about 6 mil...
The Devonian System, in Iowa, is exposed in a belt about 50 miles wide extending along a line from M...
Until recently little definite information has been accessible concerning the distribution and subdi...
At Bertram in Linn county and at Canton in Jackson county are found deposits of sandstone, shale and...
These microfossils were found in screenings obtained by washing some marly shales from the Cerro Gor...