Hydrogeologic framework of the Michigan Basin regional aquifer system

Westjohn, David B.; Weaver, Thomas

doi:10.3133/pp1418

Cited by 19 publications

(12 citation statements)

References 7 publications

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“…In these counties, unconsolidated glacial deposits are of Pleistocene origin and consist primarily of coarse-textured tills, outwash deposits formed at the front of retreating ice lobes, and glacial lacustrine deposits (Westjohn and Weaver 1998). Glacial deposits are present throughout most of the region, with depths typically ranging from 5 to 70 m. Bedrock formations are found beneath unconsolidated deposits except in the northern part of Huron County, where bedrock crops out when unconsolidated deposits are locally absent.…”

Section: Study Areamentioning

confidence: 99%

Influence of groundwater recharge and well characteristics on dissolved arsenic concentrations in southeastern Michigan groundwater

Meliker

Slotnick

Haack

et al. 2008

Environ Geochem Health

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Arsenic concentrations exceeding 10 microg/l, the United States maximum contaminant level and the World Health Organization guideline value, are frequently reported in groundwater from bedrock and unconsolidated aquifers of southeastern Michigan. Although arsenic-bearing minerals (including arsenian pyrite and oxide/hydroxide phases) have been identified in Marshall Sandstone bedrock of the Mississippian aquifer system and in tills of the unconsolidated aquifer system, mechanisms responsible for arsenic mobilization and subsequent transport in groundwater are equivocal. Recent evidence has begun to suggest that groundwater recharge and characteristics of well construction may affect arsenic mobilization and transport. Therefore, we investigated the relationship between dissolved arsenic concentrations, reported groundwater recharge rates, well construction characteristics, and geology in unconsolidated and bedrock aquifers. Results of multiple linear regression analyses indicate that arsenic contamination is more prevalent in bedrock wells that are cased in proximity to the bedrock-unconsolidated interface; no other factors were associated with arsenic contamination in water drawn from bedrock or unconsolidated aquifers. Conditions appropriate for arsenic mobilization may be found along the bedrock-unconsolidated interface, including changes in reduction/oxidation potential and enhanced biogeochemical activity because of differences between geologic strata. These results are valuable for understanding arsenic mobilization and guiding well construction practices in southeastern Michigan, and may also provide insights for other regions faced with groundwater arsenic contamination.

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Section: Study Areamentioning

confidence: 99%

Influence of groundwater recharge and well characteristics on dissolved arsenic concentrations in southeastern Michigan groundwater

Meliker

Slotnick

Haack

et al. 2008

Environ Geochem Health

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“… U, Th, and Li estimated from average lithological composition after Parker (); thickness and porosity values after Olcott () and Westjohn & Weaver (). …”

Section: Helium Isotope Resultsmentioning

confidence: 99%

Constraining groundwater flow in the glacial drift and saginaw aquifers in the Michigan Basin through helium concentrations and isotopic ratios

et al. 2015

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“…No water-bearing zones were intercepted in the Coldwater Shale, and TW2 was subsequently abandoned. As noted in Westjohn and Weaver (1998), lenses of coarser-grained rock that contain freshwater occur within the Coldwater Shale, but they are known to be discontinuous in the east part of Michigan (fig. 5) and are thin or absent in the study area and to the west (Cohee, 1979).…”

Section: Hydrogeologymentioning

confidence: 90%

“…As is typical with most places in the Midwest, the greatest depth to bedrock coincides with the larger preglacial drainageways, such as Nottawa and Pine Creeks. An extensive bibliography of available studies of the Coldwater Shale is included in Westjohn and Weaver (1998).…”

Section: Bedrockmentioning

confidence: 99%

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Water resources on and near the Nottawaseppi Huron band of Potawatomi indian tribal lands, Calhoun County, Michigan, 2000-03

Weaver¹,

Healy²,

Sabin³

2005

Open-File Report

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Physical and geographic characteristics of streams in and near the study area, Calhoun County, Michigan ……………………………………………………………… 3. Streamflow measurements of streams in and near the study area, Calhoun County, Michigan ………………………………………………………………………………… 4. Pesticide detections in ground water sampled from Nottawaseppi Huron Band of Potawatomi Indian Tribe wells, Calhoun County, Michigan ……………………………… 5. Streamflow, physical properties, major elements, solids, hardness, nutrients, and carbon concentrations and absorbance in streams in the study area, Calhoun County, Michigan ………………………………………………………………………………… 6. Trace-element concentrations in streams in the study area, Calhoun County, Michigan ......

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Hydrogeologic framework of the Michigan Basin regional aquifer system

Cited by 19 publications

References 7 publications

Influence of groundwater recharge and well characteristics on dissolved arsenic concentrations in southeastern Michigan groundwater

Influence of groundwater recharge and well characteristics on dissolved arsenic concentrations in southeastern Michigan groundwater

Constraining groundwater flow in the glacial drift and saginaw aquifers in the Michigan Basin through helium concentrations and isotopic ratios

Water resources on and near the Nottawaseppi Huron band of Potawatomi indian tribal lands, Calhoun County, Michigan, 2000-03

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