A5014457422- Geology and Paleoclimatology Research
- Soil erosion and sediment transport
- Archaeology and Natural History
- Geological formations and processes
- Aeolian processes and effects
- Diverse Educational Innovations Studies
- Groundwater and Isotope Geochemistry
- Geography Education and Pedagogy
- Archaeology and ancient environmental studies
- Isotope Analysis in Ecology
- Pleistocene-Era Hominins and Archaeology
- Species Distribution and Climate Change
- Plant Water Relations and Carbon Dynamics
- Hydrology and Sediment Transport Processes
- Hydrology and Watershed Management Studies
- Education Practices and Evaluation
- Geography and Environmental Studies
- Geochemistry and Geologic Mapping
- Remote Sensing and LiDAR Applications
- Climate Change Communication and Perception
- Maritime and Coastal Archaeology
- Research Data Management Practices
- Water Quality and Pollution Assessment
- Rangeland and Wildlife Management
- Engineering Education and Pedagogy
Western Colorado University
2011-2023
Rocky Mountain Biological Laboratory
2014-2020
University of New Mexico
2000-2015
Abstract Pedogenic carbonate is commonly used as a paleoarchive, but its interpretation limited by our understanding of formation conditions. We investigated laminated soil rinds high‐resolution paleoarchive in Torrey, Utah, USA, characterizing and modeling their compared late Holocene (<5 ka) conventional (C O) “clumped” isotopes to modern environment isotope measurements: CO 2 partial pressure, temperature, moisture, δ 13 C‐soil , 18 O precipitation, O‐soil water. Data unambiguously...
The advent of high-resolution, precise, back-pack portable terrestrial lidar scanners (TLS) provides a revolutionary new tool for obtaining quantitative, high-resolution (2-mm to 30-mm point spacing) measurements landscape surface features. Moreover, data collected using these instruments allow observation geomorphic processes in systems that can experience change on daily basis. We have introduced TLS techniques ongoing investigations semiarid landscapes associated with weakly cemented...
Authentic scientific data, when richly contextualized, can provide the basis for compelling learning experiences. Many undergraduate students either do not have access to primary or if they do, data are so abstract that student engagement is limited. Here, we describe contextual information and data-rich, student-centered activities developed give life sets from an intensely studied place, Rocky Mountain Biological Laboratory (RMBL). The project Web site, Digital RMBL, highlights charismatic...
Abstract Eolian deposition on the semiarid southern Colorado Plateau has been attributed to episodic aridity during Quaternary Period. However, OSL ages from three topographically controlled (e.g. falling) dunes Black Mesa in northeastern Arizona indicate that eolian sediments there were deposited deep tributary valleys as early 35–30 ka, with most sand before 20 ka. In contrast, oldest for sheets fall within Pleistocene-Holocene climatic transition (~ 12–8 ka). Thus sediment accumulated...
Research Article| May 01, 2012 Erosion, storage, and transport of sediment in two subbasins the Rio Puerco, New Mexico A.C. Gellis; Gellis † 1U.S. Geological Survey, 5522 Park Drive, Baltimore, Maryland 21228, USA †E-mail: agellis@usgs.gov Search for other works by this author on: GSW Google Scholar M.J. Pavich; Pavich 2U.S. 12201 Sunrise Valley Reston, Virginia 20192, A.L. Ellwein; Ellwein 3Department Natural Environmental Sciences, Western State College Colorado, Gunnison, Colorado 81231,...
The Moenkopi dune field in northeastern Arizona covers roughly 1250 km2, but most of the is inactive. Dune deposits on Plateau (MP) have remained inactive throughout Holocene despite periods elevated aridity or historical reductions vegetation cover by livestock grazing. We argue that this inactivity not because any diminishment driving forces aeolian system (e.g., insufficient winds), rather increased cohesion due to soil development enhances resistance wind erosion. Abundant sediments were...
Recent work suggests that the C- and O-isotope composition of laminated soil carbonate rinds can provide high-resolution (100 s yr/sample) information about hydrologic processes vegetation over tens thousands years. However, while this archive potentially quantitative reconstructions, most interpretations have thus far been qualitative. In study, we show how modern data "clumped" isotope paleothermometry be leveraged to constrain conditions rind formation for a sample from western Colorado...
An increasing number of geoscience departments are recognizing the need to assume a larger role in facets public education. The preparation and professional development K‐12 science teachers is particularly critical meaningful, it merges with other fundamental missions within universities. importance content for general evident numerous Earth science—related policy issues gaining ever attention, including global climate change, energy, water resources. Also, not only included education...