Results 101 to 110 of about 6,127 (222)
Stratigraphy of the Cherokee Group and Revision of Pennsylvanian Stratigraphy Nomenclature in Iowa, October 1984 [PDF]
, 1984 The Pennsylvanian System in Iowa has confronted stratigraphers with serious correlation and nomenclatural problems for many years. Sugnificant portions of the system have remained undifferentiated below group level.
core
Pennsylvanian Charophyta in Iowa
, 1949 Charophyta are a group of small plants of doubtful systematic position. They occur abundantly in quiet clear fresh and brackish waters and are widely distributed geographically.
Thomas, Leo A.
core
The origin of massive sandstone facies in an ancient braided river deposits [PDF]
, 1995 Lateral profiling techniques have been utilised to define the three-dimensional fluvial architecture of the Fell Sandstone Group (Arundian-Holkerian) of the Northumberland Basin, UK; the Lee-type sandstones (Morrowan-Atokan) of the central Appalachian ...
Martin, Charlotte Ann Lesley
core
Historic Pennsylvanian Ammonoids From Iowa
, 1966 The Pennsylvanian goniatite species Wiedeyoceras sanctijohanis (Wiedey) was described in 1929 on the basis of two specimens from Greene County, Iowa, collected by O. H. St. John about 1865.
Furnish, W. M., Spinosa, Claude
core
Little bits of dragonfly history repeating exemplified by a new Pennsylvanian family. [PDF]
R Soc Open Sci, 2023 Yang N, Ren D, Béthoux O.
europepmc +1 more source
Pennsylvanian Stratigraphy in the Southern Wasatch Mountains, Utah
, 1936 The area under consideration has a dimension of 8 miles east-west and 4 miles north-south, and includes the canyons of Spring Creek and Hobble Creek, Utah County, Utah. These streams flow off the west flank of a southern portion of the Wasatch Range, and
Bissell, H. J.
core
Impact of salinity origin on microbial communities in saline springs within the Illinois Basin, USA. [PDF]
Environ Microbiol, 2022 Zhao L +8 more
europepmc +1 more source
PRE-PENNSYLVANIAN STRATIGRAPHY OF NEBRASKA
, 1934 Sioux quartzite, granite, and schistose metamorphic rocks have been recognized in the pre-Cambrian. The present irregularities, the basins and highs, on the pre- Cambrian surface are the result of erosion and a long structural history.
Lugn, Alvin Leonard
core
Analysis of a Middle Pennsylvanian Channel Complex in Pikeville, Kentucky
, 2012 A Middle Pennsylvanian outcrop in Pikeville (eastern Kentucky) was investigated to interpret factors controlling hierarchy of fluvial architectural elements within an incised valley. A photo-mapping of the channel elements helped to identify major facies,
Chatterjee, Sumanta Kumar
core