Results 81 to 90 of about 3,414 (218)

Paleoclimatic Significance of Chemical Weathering in Loess-Derived Paleosols of Subarctic Central Alaska

, 2008
Chemical weathering in soils has not been studied extensively in high-latitude regions. Loess sequences with modern soils and paleosols are present in much of subarctic Alaska, and allow an assessment of present and past chemical weathering.
Gary Skipp, Daniel R. Muhs, John P. McGeehin, Budahn, James, James Budahn, Skipp, Gary, Ager, Thomas A., McGeehin, John P, Beann, Jossh, Jossh Beann, Muhs, Daniel R., Thomas A. Ager   +11 more
core   +1 more source

Terrestrial Response to Maastrichtian Climate Change Determined from Paleosols of the Dawson Creek Section, Big Bend National Park, Texas

Geosciences
Climate during the Late Cretaceous is characterized by a long-term cooling trend interrupted by several periods of increased warming. This study focuses on the terrestrial response to two rapid climate events just prior to the K-Pg boundary marked by the
Anna K. Lesko, Steve I. Dworkin, Stacy C. Atchley   +2 more
doaj   +1 more source

Floodplain paleosols of moskva river basin: Chronology and paleoenvironment

, 2020
© 2018 by the Arizona Board of Regents on behalf of the University of Arizona. Seven main periods of soil formation can be distinguished in the floodplain of the Moskva (Moscow) River, with the oldest paleosols dated to the Allerod age.

core  

U‐Pb Geochronology of Paleosol Carbonate Cements by LA‐ICP‐MS: A Proof of Concept and Strategy for Dating the Terrestrial Record

Geochemistry, Geophysics, Geosystems
This study investigates the potential of laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS) U‐Pb dating for carbonate nodules in the Late Triassic Ischigualasto Formation of northwestern Argentina.
L. E. Aguirre Palafox, A. Möller, N. M. McLean, G. A. Ludvigson, C. E. Colombi, I. P. Montañez   +5 more
doaj   +1 more source

Micromorphology of Paleosols of the Marília Formation and their Significance in the Paleoenvironmental Evolution of the Bauru Basin, Upper Cretaceous, Southeastern Brazil

Revista Brasileira de Ciência do Solo
Deduction of associated paleoenvironments and paleoclimate, definition of the chronosequence of paleosols, and paleogeographic reconstruction have become possible through the application of micromorphology in paleopedology.
Márcio Luiz da Silva, Alessandro Batezelli, Francisco Sérgio Bernardes Ladeira   +2 more
doaj   +1 more source

Genesis and evolution of paleosols of the Marilia formation,maastrichtian of the Bauru basin, Brazil

, 2020
Paleosols are soils that were formed on an ancient landscape. They may be buried soils and/or soils incorporated into the sedimentary sequences, exhumed soils, or soils developed on ancient relief surfaces (relict soils).
Bernardes Ladeira, Francisco Sergio, da Silva, Marcio Luiz, Batezelli, Alessandro   +2 more
core   +1 more source

Origin of clay minerals in Early Eocene volcanic paleosols on King George Island, Maritime Antarctica

Scientific Reports, 2017
The paleoclimate during the Early Eocene in Maritime Antarctica is characterized by cool conditions without a pronounced dry season. Soils formed on volcanic material under such climate conditions in modern analogue environments are usually Andosols rich
Diogo Noses Spinola, Teresa Pi-Puig, Elizabeth Solleiro-Rebolledo, Markus Egli, Masafumi Sudo, Sergey Sedov, Peter Kühn   +6 more
doaj   +1 more source

Dating Methods of Pleistocene Deposits and Their Problems: VII. Paleosols

, 1982
Paleosols, particularly buried paleosols, have proved valuable stratigraphic markers in many Quaternary studies. They are most commonly found buried by loess in central Europe and the United States, and by volcanic ash in the Pacific margins.
Evans, L. J.
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Organic matter in Holocene paleosols in the US Mid-Continent

, 2016
Paleosols are ancient soils that possess information about the earth’s environmental and climatic conditions in the past. Buried paleosols are formed by the burial of surface horizon soils by younger layers of sediments over time.
Froome, Llewin
core   +1 more source

Identification of paleosols in the Precambrian metapelitic assemblages of peninsular Indi - a major element geochemical approach [PDF]

, 1994
AI2O3 greater than 20%, positive correlation between AI2O3 and Ti02, plot towards the AI2O3 corner in the Al203-K20-Fe2O3 (T) diagram and high chemical indices of alteration and weathering (CIA, CIW) distinguish the paleosols (fossil residual soils) from
Sreenivas, B., Srinivasan, R.
core   +1 more source