TY - JOUR
T1 - Mineralogy and chemistry of Late Pliocene-Early Pleistocene paleosols on Mount Kenya
T2 - Weathering indices of relative age and paleoenvironmental reconstruction
AU - Mahaney, W.C.
AU - Hamilton, T.S.
AU - Barendregt, R.W.
AU - Hancock, R.G.V.
AU - Costa, P.
PY - 2014/1/1
Y1 - 2014/1/1
N2 - Iron and Al extracts as weathering indices in paleosols have been used in many localities to determine relative age, transformation of total chemical element concentrations to secondary forms, translocation of organically-complexed Al and long-standing inundation of soils with groundwater. On Mt. Kenya, a succession of paleosols straddling the Olduvai subchron are here analyzed to determine the degree to which Fe/Al extracts assist paleoenvironmental reconstruction, especially relative age determination, genesis and translocation of alteration products and the effect of paleoclimatic deterioration with the advent of glaciation ca. 2.0. Ma, and possibly before. Warmer/humid climate from the onset of the Plio-Pleistocene to the Olduvai subchron, thereafter reverting to a long episode of oscillating drier/wetter ice age perturbations is written into the profile morphologies, mineralogies and chemistries supporting earlier stratigraphic interpretations.
AB - Iron and Al extracts as weathering indices in paleosols have been used in many localities to determine relative age, transformation of total chemical element concentrations to secondary forms, translocation of organically-complexed Al and long-standing inundation of soils with groundwater. On Mt. Kenya, a succession of paleosols straddling the Olduvai subchron are here analyzed to determine the degree to which Fe/Al extracts assist paleoenvironmental reconstruction, especially relative age determination, genesis and translocation of alteration products and the effect of paleoclimatic deterioration with the advent of glaciation ca. 2.0. Ma, and possibly before. Warmer/humid climate from the onset of the Plio-Pleistocene to the Olduvai subchron, thereafter reverting to a long episode of oscillating drier/wetter ice age perturbations is written into the profile morphologies, mineralogies and chemistries supporting earlier stratigraphic interpretations.
UR - http://www.scopus.com/inward/record.url?scp=84887246465&partnerID=8YFLogxK
U2 - 10.1016/j.geomorph.2013.08.006
DO - 10.1016/j.geomorph.2013.08.006
M3 - Article
AN - SCOPUS:84887246465
SN - 0169-555X
VL - 204
SP - 217
EP - 228
JO - Geomorphology
JF - Geomorphology
ER -