A5045150336- Geology and Paleoclimatology Research
- Pharmaceutical and Antibiotic Environmental Impacts
- Geochemistry and Geologic Mapping
- Archaeology and Natural History
- Water Quality and Resources Studies
- Landslides and related hazards
- Toxic Organic Pollutants Impact
- Hydrology and Sediment Transport Processes
- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Remote Sensing and LiDAR Applications
- Soil erosion and sediment transport
- Hydrology and Watershed Management Studies
- Image Processing and 3D Reconstruction
- Isotope Analysis in Ecology
- Atmospheric and Environmental Gas Dynamics
- Microplastics and Plastic Pollution
- Pesticide Residue Analysis and Safety
- BIM and Construction Integration
- Soil Geostatistics and Mapping
- Geological formations and processes
- Fire effects on ecosystems
- Ecology and biodiversity studies
- Cryospheric studies and observations
- Mineralogy and Gemology Studies
Winona State University
2024
University of Minnesota
2007-2014
State University of New York at Potsdam
2014
Science Museum of Minnesota
2010
Triclosan, a widely used antimicrobial, is known to undergo phototransformation in aqueous solution form 2,8-dichlorodibenzo-p-dioxin (2,8-DCDD). Two sediment cores from wastewater-impacted depositional zone of the Mississippi River were analyzed for triclosan by ultra performance liquid chromatography-triple quadrupole mass spectrometry (UPLC-MS-Q3) and suite polychlorinated dioxins furans high resolution gas chromatography−mass (HRGC-MS) provide evidence this photoreaction environment....
When discharged into surface waters via wastewater effluents, triclosan, the antimicrobial agent in handsoaps, and chlorinated triclosan derivatives (CTDs, formed during disinfection with chlorine) react photochemically to form polychlorinated dibenzo-p-dioxins. To evaluate historical exposure of these compounds, levels CTDs, their derived dioxins were determined sediment cores collected from wastewater-impacted Minnesota lakes. The accumulation rates temporal trends aquatic sediments found...
Long‐term (10 5 years) fault slip rates test the scale of discrepancy between infrequent paleoseismicity and relatively rapid geodetic dextral shear in Eastern California Shear Zone (ECSZ). The Calico is one a family faults that traverse Mojave Desert portion ECSZ. Its rate determined from matching dating incised Pleistocene alluvial fan deposits surfaces displaced by slip. A high‐resolution topographic base acquired via airborne laser swath mapping aids identification deformed geomorphic...
The use of strobilurin fungicides in agriculture has increased steadily during the past 25 years, and although strobilurins have minimal water solubility, they regularly appear surface waters, at times concentrations approaching toxic levels for aquatic life. present study examined designated trout streams draining an agricultural watershed southeastern Minnesota, USA, where may contributed to a recent fish kill. Water samples (n = 131) were analyzed presence five different (azoxystrobin,...
The use of strobilurin fungicides in agriculture has increased steadily during the past 25 years, and although strobilurins have minimal water solubility, they regularly appear surface waters, at times concentrations approaching toxic levels for aquatic life. present study examined designated trout streams draining an agricultural watershed southeastern Minnesota, USA, where may contributed to a recent fish kill. Water samples (n = 131) were analyzed presence five different (azoxystrobin,...
Abstract Magnetic susceptibility (MS) is commonly measured on lake sediments and used as a proxy for clastic input soil erosion, correlating among cores in the same basin aligning successive overlapping drives of core. There are several common techniques measuring MS, each with its own advantages. Here we compare three such sediment core from Lake Pepin: (a) loop-sensor MS logging wet intact core; (b) point-sensor split (lengthwise) (c) discrete measurements dried subsamples using bridge. To...
[1] In the paper “Slip rate of Calico fault: Implications for geologic versus geodetic discrepancy in Eastern California Shear Zone” by Michael Oskin, Lesley Perg, Dylan Blumentritt, Sujoy Mukhopadhyay, and Alexander Iriondo (Journal Geophysical Research, 112, B03402, doi:10.1029/2006JB004451, 2007), erosion rates were miscalculated from 10Be concentrations exhumed quartz monzonite boulders on F alluvial fan at Sheep Springs wash study area. The measured could be interpreted as steady state...