Results 1 to 10 of about 754 (160)
Archean (3.3 Ga) paleosols and paleoenvironments of Western Australia [PDF]
PLoS ONE, 2023 The Pilbara craton of northwestern Australia is known for what were, when reported, the oldest known microfossils and paleosols on Earth. Both interpretations are mired in controversy, and neither remain the oldest known.
Gregory J Retallack, Mark D Schmitz
exaly +3 more sources
Ediacaran-Cambrian paleosols of Nevada and California. [PDF]
PLoS ONEThe Cambrian and Ediacaran sequence of California and Nevada is rife with unconformities, paleovalleys, paleosols, and fluvial facies. This study confirms shallow marine environments for grey stromatolitic dolostone and shale of northern localities (Mt ...
Gregory J Retallack
doaj +2 more sources
Organic Matter Preservation in Ancient Soils of Earth and Mars [PDF]
Life, 2020 The emerging field of astropedology is the study of ancient soils on Earth and other planetary bodies. Examination of the complex factors that control the preservation of organic matter and other biosignatures in ancient soils is a high priority for ...
Adrian P. Broz
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Accumulation of radiocarbon in ancient landscapes: A small but significant input of unknown origin [PDF]
Scientific Reports, 2023 The persistence of organic carbon (C) in soil is most often considered at timescales ranging from tens to thousands of years, but the study of organic C in paleosols (i.e., ancient, buried soils) suggests that paleosols may have the capacity to preserve ...
Adrian Broz +3 more
doaj +2 more sources
Characterizing porous microaggregates and soil organic matter sequestered in allophanic paleosols on Holocene tephras using synchrotron-based X-ray microscopy and spectroscopy [PDF]
Scientific Reports, 2021 Allophanic tephra-derived soils can sequester sizable quantities of soil organic matter (SOM). However, no studies have visualized the fine internal porous structure of allophanic soil microaggregates, nor studied the carbon structure preserved in such ...
Doreen Yu-Tuan Huang +6 more
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Eocene (50–55 Ma) greenhouse climate recorded in nonmarine rocks of San Diego, CA, USA [PDF]
Scientific ReportsNonmarine rocks in sea cliffs of southern California store a detailed record of weathering under tropical conditions millions of years ago, where today the climate is much drier and cooler.
Adrian P. Broz +5 more
doaj +2 more sources
Paleosols in the Transantarctic Mountains: indicators of environmental change [PDF]
Solid Earth, 2013 The Transantarctic Mountains (TAMs), a 3500 km long chain that subdivides East Antarctica from West Antarctica, are important for reconstructing the tectonic, glacial, and climatic history of Antarctica.
J. G. Bockheim
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Geosciences, 2021 Late Cretaceous coastal plain deposits of the Prince Creek Formation (PCF) offer a rare glimpse into an ancient, high-latitude, arctic greenhouse ecosystem for which there is no modern analog.
James R. Bonelli, Peter P. Flaig
doaj +1 more source
Geosciences, 2022 This work presents the chronology of the Holocene filling of the Guadalentín Tectonic Depression (Murcia, SE Spain) combining 14C and OSL age data. This work studies the sediments and paleosols interbedded in the sedimentary sequence between Totana and ...
Pablo G. Silva +5 more
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Pedoarcheological Research of the Zhayyk-1 Kurgan
Нижневолжский археологический вестник, 2020 The article reveals the results of pedoarchaeological research of the Zhayyk-kurgan. The research is based on the pedoarchaeological method in the study of historical monuments as a part of natural.
Maxim V. Eltsov
doaj +1 more source