Search Results - "Holland, H D"

Dating the rise of atmospheric oxygen by Bekker, A, Holland, H. D, Wang, P.-L, Rumble, D, Stein, H. J, Hannah, J. L, Coetzee, L. L, Beukes, N. J

“…Several lines of geological and geochemical evidence indicate that the level of atmospheric oxygen was extremely low before 2.45 billion years (Gyr) ago, and…”
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Paleosols and the evolution of atmospheric oxygen: a critical review by Rye, R, Holland, H D

“…A number of investigators have used chemical profiles of paleosols to reconstruct the evolution of atmospheric oxygen levels during the course of Earth history…”
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Atmospheric carbon dioxide concentrations before 2.2 billion years ago by Rye, R., Kuo, P. H., Holland, H. D.

“…The composition of the Earth's early atmosphere is a subject of continuing debate. In particular, it has been suggested that elevated concentrations of…”
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Volcanic gases, black smokers, and the great oxidation event by Holland, Heinrich D.

“…This paper proposes that gradual changes in the composition of volatiles that have been added to the atmosphere-ocean system are responsible for the Great…”
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Evidence for Life on Earth More Than 3850 Million Years Ago by Holland, Heinrich D.

“…When did life first appear on Earth? Previous efforts to answer this fundamental question have found early life as far back as 3450 million years ago, in rock…”
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Chemical evolution of seawater during the Phanerozoic: Implications from the record of marine evaporites by Horita, Juske, Zimmermann, Heide, Holland, Heinrich D.

“…The chemical evolution of seawater during the Phanerozoic is still a matter of debate. We have assembled and critically analyzed the available data for the…”
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Geology and geochemistry of paleosols developed on the Hekpoort Basalt, Pretoria Group, South Africa by Rye, R, Holland, H D

“…The Hekpoort paleosols comprise a regional paleoweathering horizon developed on 2.224 +/- 0.021 Ga basaltic andesite lavas at the top of the Hekpoort Formation…”
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Rare earth elements and heavy metal distribution in estuarine sediments of east coast of India by RAMESH, R, RAMANATHAN, A. L, JAMES, R. A, SUBRAMANIAN, V, JACOBSEN, S. B, HOLLAND, H. D

“…Bed sediment samples collected from the Hoogly, Godavari, Krishna and Cauvery estuaries on the east coast of India were analyzed for rare earth elements…”
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The evaporation path of seawater and the coprecipitation of Br- and K+ with halite by McCaffrey, M A, Lazar, B, Holland, H D

“…Brines and salt were sampled at the Morton Bahamas solar salt production facility on Great Inagua Island in the Bahamas. The brines were analyzed by ion…”
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Primitive Os and 2316 Ma age for marine shale: implications for Paleoproterozoic glacial events and the rise of atmospheric oxygen by Hannah, Judith L., Bekker, Andrey, Stein, Holly J., Markey, Richard J., Holland, Heinrich D.

“…Re–Os dating of synsedimentary to early diagenetic pyrite from carbonaceous shale that straddles the boundary between the Rooihoogte and Timeball Hill…”
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The photochemistry of manganese and the origin of Banded Iron Formations by Anbar, A D, Holland, H D

“…The photochemical oxidation of Fe(2+) -hydroxide complexes dissolved in anoxic Precambrian oceans has been suggested as a mechanism to explain the deposition…”
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Life associated with a 2.76 Ga ephemeral pond?: evidence from Mount Roe #2 paleosol by Rye, R, Holland, H D

“…Dark sericitic material at and near the top of the 2.765 +/- 0.01 Ga Mount Roe #2 paleosol in Western Australia contains 0.05-0.10 wt% organic carbon with…”
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Oxygen overshoot and recovery during the early Paleoproterozoic by Bekker, A., Holland, H.D.

“…During the Lomagundi Event, ca. 2.22 to 2.06Ga, marine carbonates recorded the largest and longest uninterrupted positive carbon isotope excursion, the…”
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Evolution of the atmosphere and oceans by Holland, H. D, Lazar, B, McCaffrey, M

“…The residence times of most constituents of the atmosphere and oceans are small fractions of the age of the Earth and, in general, their rate of output has…”
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100th Anniversary Special Paper: Sedimentary Mineral Deposits and the Evolution of Earth's Near-Surface Environments by Holland, H. D.

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A paleoweathering profile from Griqualand West, South Africa: evidence for a dramatic rise in atmospheric oxygen between 2.2 and 1.9 bybp by Holland, H D, Beukes, N J

“…A core drilled near Wolhaarkop in Griqualand West, South Africa, intersected highly oxidized Kuruman Iron Formation below red beds of the Gamagara Formation…”
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The Flin Flon paleosol and the composition of the atmosphere 1.8 BYBP by Holland, H D, Feakes, C R, Zbinden, E A

“…Within the 1800 to 1900 my old Flin Flon-Snow Lake greenstone belt, Amisk Group volcanics are overlain by Missi Group fluvial sediments. Several localities…”
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Redox Stabilization of the Atmosphere and Oceans and Marine Productivity by Colman, Albert S., Mackenzie, Fred T., Holland, Heinrich D., Van Cappellen, P., Ingall, E. D.

“…Researchers developed a coupled biogeochemical box model to determine the stabilizing effects of phosphorous and oxygen cycles on atmospheric O2 during the…”
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The Sturgeon Falls paleosol and the composition of the atmosphere 1.1 Ga BP by Zbinden, E A, Holland, H D, Feakes, C R

“…A paleosol is exposed along the north bank of the Sturgeon River, some 25 km SW of Baraga, Michigan. The paleosol was developed on hydrothermally altered…”
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REE chemistry and Sm-Nd systematics of late Archean weathering profiles in the Fortescue Group, Western Australia by MacFarlane, A W, Danielson, A, Holland, H D, Jacobsen, S B

“…Two weathering profiles, each consisting of an upper, sericite-rich zone and a lower, chlorite-rich zone, are preserved between flows of the Mt. Roe Basalt in…”
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