A5024149862- Archaeology and Natural History
- Geological Modeling and Analysis
- Geology and Paleoclimatology Research
- Geochemistry and Geologic Mapping
- Botany, Ecology, and Taxonomy Studies
- Geological Studies and Exploration
- Landslides and related hazards
- Geological formations and processes
- Hydrocarbon exploration and reservoir analysis
- Geological and Geochemical Analysis
- Groundwater flow and contamination studies
- Water Quality and Resources Studies
- Groundwater and Isotope Geochemistry
- Paleontology and Stratigraphy of Fossils
- Geotechnical and construction materials studies
- Clay minerals and soil interactions
- Botany and Plant Ecology Studies
- Hydraulic Fracturing and Reservoir Analysis
- Geography Education and Pedagogy
- Hydrology and Sediment Transport Processes
- Geochemistry and Elemental Analysis
- Pleistocene-Era Hominins and Archaeology
- Pacific and Southeast Asian Studies
- Ecology and biodiversity studies
- Fluid Dynamics Simulations and Interactions
United States Geological Survey
2006-2024
University of Iowa
2008-2024
Iowa Geological Survey
2006-2023
In the wake of improved conodont biostratigraphic information from Louisiana and McCraney in tri-state area (Chauffe & Nichols 1995, Chauffe Guzman 1997), following preparation multiple field trip guidebooks to region (Heckel 2001, Witzke et al. 2002), correlation these beds southeast Iowa with Formation came into question.Witzke Bunker (2002) summarized issues southeastern began using term "McCraney"
ABSTRACT A pre‐Late Wisconsinan, post‐Illinoian, till sheet has long been recognized in north‐central Iowa, but not formally or defined until now. Early researchers referred to these deposits as the ‘Tazewell’, and term ‘Sheldon Creek’ was more recently used informally by Iowa Geological Survey guidebooks reports. Recent mapping extended eastern margin significantly past previous interpretations. The Sheldon Creek Formation similar lithologic characteristics overlying Alden Member of Dows...