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
Soils developed in granitic alluvium near Merced, California Soils developed in granitic alluvium near Merced, California
No abstract available.
Authors
J.W. Harden
Soils developed on coastal and fluvial terraces near Ventura, California Soils developed on coastal and fluvial terraces near Ventura, California
No abstract available.
Authors
J.W. Harden, Andrei M. Sarna-Wojcicki, Glenn R. Dembroff
A quantitative comparison of Soil Development in four climatic regimes A quantitative comparison of Soil Development in four climatic regimes
A new quantitative Soil Development Index based on field data has been applied to chronosequences formed under different climatic regimes. The four soil chronosequences, developed primarily on sandy deposits, have some numeric age control and are located in xeric-inland (Merced, Calif.), xeric-coastal (Ventura, Calif.), aridic (Las Cruces, N. Mex.), and udic (Susquehanna Valley, Pa.)...
Authors
J.W. Harden, E. M. Taylor
A quantitative index of soil development from field descriptions: Examples from a chronosequence in central California A quantitative index of soil development from field descriptions: Examples from a chronosequence in central California
A soil development index has been developed in order to quantitatively measure the degree of soil profile development. This index, which combines eight soil field properties with soil thickness, is designed from field descriptions of the Merced River chronosequence in central California. These eight properties are: clay films, texture plus wet consistence, rubification (color hue and...
Authors
J.W. Harden
Quaternary stratigraphy and interpretation of soil data from the Auburn, Oroville, and Sonora areas along the foothills fault system, western Sierra Nevada, California Quaternary stratigraphy and interpretation of soil data from the Auburn, Oroville, and Sonora areas along the foothills fault system, western Sierra Nevada, California
No abstract available.
Authors
Jennifer W. Harden, Denis E. Marchand
Preliminary geologic maps showing Quaternary deposits of the lower Tuolumne and Stanislaus alluvial fans and along the lower San Joaquin River, Stanislaus County, California (Westley, Brush Lake, Ripon, and Salida 7 1/2' quadrangles) Preliminary geologic maps showing Quaternary deposits of the lower Tuolumne and Stanislaus alluvial fans and along the lower San Joaquin River, Stanislaus County, California (Westley, Brush Lake, Ripon, and Salida 7 1/2' quadrangles)
No abstract available.
Authors
Denis E. Marchand, J.W. Harden
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
Soils developed in granitic alluvium near Merced, California Soils developed in granitic alluvium near Merced, California
No abstract available.
Authors
J.W. Harden
Soils developed on coastal and fluvial terraces near Ventura, California Soils developed on coastal and fluvial terraces near Ventura, California
No abstract available.
Authors
J.W. Harden, Andrei M. Sarna-Wojcicki, Glenn R. Dembroff
A quantitative comparison of Soil Development in four climatic regimes A quantitative comparison of Soil Development in four climatic regimes
A new quantitative Soil Development Index based on field data has been applied to chronosequences formed under different climatic regimes. The four soil chronosequences, developed primarily on sandy deposits, have some numeric age control and are located in xeric-inland (Merced, Calif.), xeric-coastal (Ventura, Calif.), aridic (Las Cruces, N. Mex.), and udic (Susquehanna Valley, Pa.)...
Authors
J.W. Harden, E. M. Taylor
A quantitative index of soil development from field descriptions: Examples from a chronosequence in central California A quantitative index of soil development from field descriptions: Examples from a chronosequence in central California
A soil development index has been developed in order to quantitatively measure the degree of soil profile development. This index, which combines eight soil field properties with soil thickness, is designed from field descriptions of the Merced River chronosequence in central California. These eight properties are: clay films, texture plus wet consistence, rubification (color hue and...
Authors
J.W. Harden
Quaternary stratigraphy and interpretation of soil data from the Auburn, Oroville, and Sonora areas along the foothills fault system, western Sierra Nevada, California Quaternary stratigraphy and interpretation of soil data from the Auburn, Oroville, and Sonora areas along the foothills fault system, western Sierra Nevada, California
No abstract available.
Authors
Jennifer W. Harden, Denis E. Marchand
Preliminary geologic maps showing Quaternary deposits of the lower Tuolumne and Stanislaus alluvial fans and along the lower San Joaquin River, Stanislaus County, California (Westley, Brush Lake, Ripon, and Salida 7 1/2' quadrangles) Preliminary geologic maps showing Quaternary deposits of the lower Tuolumne and Stanislaus alluvial fans and along the lower San Joaquin River, Stanislaus County, California (Westley, Brush Lake, Ripon, and Salida 7 1/2' quadrangles)
No abstract available.
Authors
Denis E. Marchand, J.W. Harden
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government