Search Results - "Morrison, Jean M."

Geomorphic controls on mercury accumulation in soils from a historically mined watershed, Central California Coast Range, USA by Holloway, JoAnn M., Goldhaber, Martin B., Morrison, Jean M.

“…Historic Hg mining in the Cache Creek watershed in the Central California Coast Range has contributed to the downstream transport of Hg to the San Francisco…”
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Modifications to EPA Method 3060A to Improve Extraction of Cr(VI) from Chromium Ore Processing Residue-Contaminated Soils by Mills, Christopher T, Bern, Carleton R, Wolf, Ruth E, Foster, Andrea L, Morrison, Jean M, Benzel, William M

“…It has been shown that EPA Method 3060A does not adequately extract Cr­(VI) from chromium ore processing residue (COPR). We modified various parameters of EPA…”
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Chromium(VI) generation in vadose zone soils and alluvial sediments of the southwestern Sacramento Valley, California: A potential source of geogenic Cr(VI) to groundwater by Mills, Christopher T., Morrison, Jean M., Goldhaber, Martin B., Ellefsen, Karl J.

“…► Southern Sacramento Valley soil and sediment has abundant naturally-occurring Cr(III). ► Cr(III) resides mainly in chromite but some is associated with clays…”
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Hydrogeochemistry of prairie pothole region wetlands: Role of long-term critical zone processes by Goldhaber, Martin B., Mills, Christopher T., Morrison, Jean M., Stricker, Craig A., Mushet, David M., LaBaugh, James W.

“…This study addresses the geologic and hydrogeochemical processes operating at a range of scales within the prairie pothole region (PPR). The PPR is a…”
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Weathering and transport of chromium and nickel from serpentinite in the Coast Range ophiolite to the Sacramento Valley, California, USA by Morrison, Jean M., Goldhaber, Martin B., Mills, Christopher T., Breit, George N., Hooper, Robert L., Holloway, JoAnn M., Diehl, Sharon F., Ranville, James F.

“…•Cr and Ni in valley soils result from weathering and transport of ultramafic sources.•The primary source of Ni is serpentine and the primary source of Cr is…”
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A regional-scale study of chromium and nickel in soils of northern California, USA by Morrison, Jean M., Goldhaber, Martin B., Lee, Lopaka, Holloway, JoAnn M., Wanty, Richard B., Wolf, Ruth E., Ranville, James F.

“…A soil geochemical survey was conducted in a 27,000-km 2 study area of northern California that includes the Sierra Nevada Mountains, the Sacramento Valley,…”
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Cluster analysis of a regional-scale soil geochemical dataset in northern California by Morrison, Jean M., Goldhaber, Martin B., Ellefsen, Karl J., Mills, Christopher T.

“…► Over 1300 soil samples were chemically analyzed for 42 elements as part of a geochemical landscape study in northern California. ► Two types of cluster…”
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A regional soil and sediment geochemical study in northern California by Goldhaber, Martin B., Morrison, Jean M., Holloway, JoAnn M., Wanty, Richard B., Helsel, Dennis R., Smith, David B.

“…Regional-scale variations in soil geochemistry were investigated in a 20,000-km 2 study area in northern California that includes the western slope of the…”
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Using stable isotopes to understand hydrochemical processes in and around a Prairie Pothole wetland in the Northern Great Plains, USA by Mills, Christopher T., Goldhaber, Martin B., Stricker, Craig A., Holloway, JoAnn M., Morrison, Jean M., Ellefsen, Karl J., Rosenberry, Donald O., Thurston, Roland S.

“…► A stable isotope study of the hydrochemistry of a Prairie Pothole wetland system. ► δ 18O H2O and δ 2H H2O values show salt concentration by transpiration at…”
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Regional variations in water quality and relationships to soil and bedrock weathering in the southern Sacramento Valley, California, USA by Wanty, Richard B., Goldhaber, Martin B., Morrison, Jean M., Lee, Lopaka

“…Regional patterns in ground- and surface-water chemistry of the southern Sacramento Valley in California were evaluated using publicly available geochemical…”
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Incorporating streambank wells in stream mass loading studies to more effectively identify sources of solutes in stream water by Manning, Andrew H., Runkel, Robert L., Morrison, Jean M., Wanty, Richard B., Walton-Day, Katherine

“…Stream synoptic sampling studies that include flow estimates derived from the stream tracer dilution method are now commonly performed to identify sources and…”
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Insights into controls on hexavalent chromium in groundwater provided by environmental tracers, Sacramento Valley, California, USA by Manning, Andrew H., Mills, Christopher T., Morrison, Jean M., Ball, Lyndsay B.

“…•Environmental tracers and Cr data were interpreted to evaluate Cr source/transport.•One group of samples with elevated Cr(VI) contain irrigation recharge…”
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Using stream-side groundwater discharge for geochemical exploration in mountainous terrain by Manning, Andrew H., Morrison, Jean M., Wanty, Richard B., Mills, Christopher T.

“…Groundwater chemistry has been predominantly used in geochemical exploration studies to identify mineralized targets concealed under transported cover in areas…”
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The role of critical zone processes in the evolution of the Prairie Pothole Region wetlands by Goldhaber, M.B., Mills, C., Stricker, C.A., Morrison, J.M.

“…► The geochemistry of Prairie Pothole wetlands in ND is governed by oxidation of pyrite. ► Pyrite oxidation progressively leads to sulfate dominated wetland…”
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Geomorphic controls on mercury accumulation in soils from a historically mined watershed, Central California Coast Range, USA: Geochemical Studies of North American Soils: Results from the Pilot Study Phase of the North American Soil Geochemical Landscapes Project by HOLLOWAY, Joann M, GOLDHABER, Martin B, MORRISON, Jean M

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Regional variations in water quality and relationships to soil and bedrock weathering in the southern Sacramento Valley, California, USA: Geochemical Studies of North American Soils: Results from the Pilot Study Phase of the North American Soil Geochemical Landscapes Project by WANTY, Richard B, GOLDHABER, Martin B, MORRISON, Jean M, LEE, Lopaka

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A regional soil and sediment geochemical study in northern California: Geochemical Studies of North American Soils: Results from the Pilot Study Phase of the North American Soil Geochemical Landscapes Project by GOLDHABER, Martin B, MORRISON, Jean M, HOLLOWAY, Joann M, WANTY, Richard B, HELSEL, Dennis R, SMITH, David B

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A regional-scale study of chromium and nickel in soils of northern California, USA: Geochemical Studies of North American Soils: Results from the Pilot Study Phase of the North American Soil Geochemical Landscapes Project by MORRISON, Jean M, GOLDHABER, Martin B, LEE, Lopaka, HOLLOWAY, Joann M, WANTY, Richard B, WOLF, Ruth E, RANVILLE, James F

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Weathering Transport and Bioaccessibility of Cromium and Nickel in Soils Derived from Ultramafic Rocks in Northern California by Morrison, Jean M

“…A soil geochemical study in northern California was conducted to investigate the role that weathering and transport play in the regional distribution and…”
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Geochemical Processes Controlling a Coal Acid Mine Drainage Mixing Zone and the Impacts on Cane Creek, Alabama by Morrison, Jean M

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