Results 61 to 70 of about 8,428 (209)

The Need for Long‐Term Monitoring When Assessing Sediment Production of the Black Vermillion River in Northeast Kansas

open access: yesJAWRA Journal of the American Water Resources Association, Volume 62, Issue 4, August 2026.
ABSTRACT Tuttle Creek Reservoir provides flood control, water supply, wildlife habitat, and recreation for approximately 40% of Kansas residents and has lost 50% of its capacity to sedimentation since 1960. A 2012 study that focused on sediment contributed by the Black Vermillion River (BVR), monitored 18 study banks and 18 cross sections within three ...
Michael E. McNair
wiley   +1 more source

Thermal and Structural Reconstruction of an Eroded Foreland Basin: Central Appalachian Basin, USA

open access: yesBasin Research, Volume 38, Issue 4, July–August 2026.
New low‐temperature thermochronology and modelling reveal a complex thermal history for the central Appalachian Basin. Results indicate Carboniferous exhumation of the fold‐thrust belt and Mesozoic heating in the foredeep linked to the Rome Trough. Deeply buried Devonian source rocks were consequently pushed past the peak oil and gas windows.
Kristopher L. Symanski   +3 more
wiley   +1 more source

Fossil Jellyfishes from Kansas Pennsylvanian Rocks and Elsewhere [PDF]

open access: yes, 1955
A new Pennsylvanian genus of jellyfishes, Crucimedusina, tentatively is referred to the order Hydroida. New genera of Scyphomedusae include Duodecimedusina, established for one new Devonian and two new Pennsylvanian species, and  ...
Harrington, H.J., Moore, R.C.
core   +1 more source

Stratigraphy Along Mississippian-Pennsylvanian Unconformity of Western Indiana [PDF]

open access: yes, 1950
Indiana Geological Survey Guidebook 4The Mississippian-Pennsylvanian unconformity is the most pronounced and extensive break in the Paleozoic rocks of the Eastern Interior Basin.
Bieberman, Robert A.   +2 more
core   +1 more source

Late paleozoic and early mesozoic plant fossils from the Cordillera Oriental of Colombia and correlation of the Giron Formation

open access: yesBoletín Geológico, 1960
Fossil plants from a few localities in the Girón Formation and associated rocks in Santander and Boyacá provide additional information regarding the age of the Girón Formation.
Jean H. Langenheim
doaj   +1 more source

The Ames impact structure, Oklahoma: New radioisotopic constraints and implications for North American impact chronology

open access: yesMeteoritics &Planetary Science, Volume 61, Issue 8, Page 2103-2139, August 2026.
Abstract The Ames impact structure (Oklahoma) is thought to have formed during the Ordovician Meteor Event, based on conodont biostratigraphy of its crater fill. Here, U–Pb zircon dates from its impact‐melt portion, conducted using secondary ion mass spectrometry and laser ablation–inductively coupled plasma–mass spectrometry (n = 37 spots), yield a ...
Elizabeth J. Catlos   +9 more
wiley   +1 more source

The Pennsylvanian System in the Mud Springs Mountains, Sierra County, New Mexico, USA

open access: yes, 2016
Geology, Stratigraphic -- Pennsylvanian; Geology -- New Mexico --Sierra County; Paleontology -- New Mexico -- Sierra County; Geology; Geology, Stratigraphic; Paleontology; Pennsylvanian Geologic Period; New Mexico - Sierra ...
Spencer G. Lucas, Karl Krainer, James E. Barrick and Daniel Vachard
core  

Pennsylvanian-Permian Fusulinaceans of the Big Hatchet Mountains, New Mexico

open access: yes, 2006
Pennsylvanian; Permian; fusulinaceans; Big Hatchet Mountains; New ...
Garner L. Wilde
core  

CARBONIFEROUS CONODONT BIOSTRATIGRAPHY AND LATE PALAEOZOIC DEPOSITIONAL EVOLUTION IN SOUTH CENTRAL IRAN (ASADABAD SECTION - SE ISFAHAN)

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2007
Asadabad section in Central Iran is one of the most complete sequences so far described across the Carboniferous of Iran. The stratigraphic and biostratigraphic data on the sediments overlying the Devonian carbonate platform give evidence about the ...
ILIANA BONCHEVA   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy