Jennifer Harden, PhD (Former Employee)
Science and Products
Filter Total Items: 144
Soil formation on the Trail Canyon alluvial fan, Fish Lake Valley, Nevada Soil formation on the Trail Canyon alluvial fan, Fish Lake Valley, Nevada
No abstract available.
Authors
J.W. Harden, J. L. Slate, P. J. Lamothe, O.A. Chadwick, E. G. Pendall, A.R. Gillespie
Pedogenic isotopic indicators of climate and carbon cycling in Fish Lake valley, Nevada Pedogenic isotopic indicators of climate and carbon cycling in Fish Lake valley, Nevada
No abstract available.
Authors
E. G. Pendall, J.W. Harden, S.E. Trumbore
Soil development on stable landforms and implications for landscape studies Soil development on stable landforms and implications for landscape studies
Soil development parameters include a wide variety of morphological, chemical, and mineralogical parameters, but some of the best indicators of time and surface stability are derived from field morphology. Over long time-spans, the most common time function for soil development is exponential or logarithmic, in which rates decrease with increasing age. Over shorter time-spans in semi...
Authors
J.W. Harden
Development rates of Late Quaternary soils, Silver Lake playa, California Development rates of Late Quaternary soils, Silver Lake playa, California
Soils formed on alluvial fan deposits that range in age from about 35 000 to 200 yr BP near Silver Lake playa in the Mojave Desert permit study of the rates of soil development in an arid, hyperthermic climate. Field-described properties of soils were quantified and analyzed using a soil development index that combines properties and horizon thicknesses. We compared the variability in...
Authors
M.C. Reheis, J.W. Harden, Leslie D. McFadden, Ralph R. Shroba
Genetic interpretations of elemental and chemical differences in a soil chronosequence, California Genetic interpretations of elemental and chemical differences in a soil chronosequence, California
Soils developed on fluvial terraces in central California have similar parent materials, climatic settings, vegetation cover and slopes but range in age from 40,000 to 3,000,000 years. The soils have chemical compositions that change systematically with increasing age. Such chemical differentiation is most likely the result of long-term weathering and mineralogical transformations that...
Authors
J.W. Harden
A statistical method for estimating rates of soil development and ages of geologic deposits: A design for soil-chronosequence studies A statistical method for estimating rates of soil development and ages of geologic deposits: A design for soil-chronosequence studies
A statistical method for estimating rates of soil development in a given region based on calibration from a series of dated soils is used to estimate ages of soils in the same region that are not dated directly. The method is designed specifically to account for sampling procedures and uncertainties that are inherent in soil studies. Soil variation and measurement error, uncertainties in
Authors
P. Switzer, J.W. Harden, R. K. Mark
Science and Products
Filter Total Items: 144
Soil formation on the Trail Canyon alluvial fan, Fish Lake Valley, Nevada Soil formation on the Trail Canyon alluvial fan, Fish Lake Valley, Nevada
No abstract available.
Authors
J.W. Harden, J. L. Slate, P. J. Lamothe, O.A. Chadwick, E. G. Pendall, A.R. Gillespie
Pedogenic isotopic indicators of climate and carbon cycling in Fish Lake valley, Nevada Pedogenic isotopic indicators of climate and carbon cycling in Fish Lake valley, Nevada
No abstract available.
Authors
E. G. Pendall, J.W. Harden, S.E. Trumbore
Soil development on stable landforms and implications for landscape studies Soil development on stable landforms and implications for landscape studies
Soil development parameters include a wide variety of morphological, chemical, and mineralogical parameters, but some of the best indicators of time and surface stability are derived from field morphology. Over long time-spans, the most common time function for soil development is exponential or logarithmic, in which rates decrease with increasing age. Over shorter time-spans in semi...
Authors
J.W. Harden
Development rates of Late Quaternary soils, Silver Lake playa, California Development rates of Late Quaternary soils, Silver Lake playa, California
Soils formed on alluvial fan deposits that range in age from about 35 000 to 200 yr BP near Silver Lake playa in the Mojave Desert permit study of the rates of soil development in an arid, hyperthermic climate. Field-described properties of soils were quantified and analyzed using a soil development index that combines properties and horizon thicknesses. We compared the variability in...
Authors
M.C. Reheis, J.W. Harden, Leslie D. McFadden, Ralph R. Shroba
Genetic interpretations of elemental and chemical differences in a soil chronosequence, California Genetic interpretations of elemental and chemical differences in a soil chronosequence, California
Soils developed on fluvial terraces in central California have similar parent materials, climatic settings, vegetation cover and slopes but range in age from 40,000 to 3,000,000 years. The soils have chemical compositions that change systematically with increasing age. Such chemical differentiation is most likely the result of long-term weathering and mineralogical transformations that...
Authors
J.W. Harden
A statistical method for estimating rates of soil development and ages of geologic deposits: A design for soil-chronosequence studies A statistical method for estimating rates of soil development and ages of geologic deposits: A design for soil-chronosequence studies
A statistical method for estimating rates of soil development in a given region based on calibration from a series of dated soils is used to estimate ages of soils in the same region that are not dated directly. The method is designed specifically to account for sampling procedures and uncertainties that are inherent in soil studies. Soil variation and measurement error, uncertainties in
Authors
P. Switzer, J.W. Harden, R. K. Mark
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