Results 61 to 70 of about 85,915 (189)

Pliocene-Pleistocene marine cyclothems, Wanganui Basin, New Zealand: a lithostratigraphic framework [PDF]

, 1995
The Rangitikei River valley between Mangaweka and Vinegar Hill and the surrounding Ohingaiti region in eastern Wanganui Basin contains a late Pliocene to early Pleistocene (c. 2.6-1.7 Ma), c.
Abbott S. T., Aguirre E., Anderton P. W., Feldmeyer A. E., Fleming C. A., Milne J. D. G., Naish T. R., Pillans B., Seward D., Shackleton N. J., Stern T. A., Te Punga M. T., Vail P., Wilson G. S.   +13 more
core   +2 more sources

Deglacial Pulse of Neutralized Carbon From the Pacific Seafloor: A Natural Analog for Ocean Alkalinity Enhancement?

Geophysical Research Letters
The ocean carbon reservoir controls atmospheric carbon dioxide (CO2) on millennial timescales. Radiocarbon (14C) anomalies in eastern North Pacific sediments suggest a significant release of geologic 14C‐free carbon at the end of the last ice age but ...
R. A. Green, M. P. Hain, P. A. Rafter
doaj   +1 more source

Seismic modeling of two depositional systems

Annals of Geophysics, 1994
Two ideal lithologic sections representing a tidal bar system and a fluvial complex were drawn in order to run seismic modeling programs developed by OGS on behalf of the European Community.
G. Seriani, M. Rebesco, A. Polonia, A. Manzella, C. De Cillia, G. Casula, G. Brancolini   +6 more
doaj   +1 more source

Bauxites : Feedbacks of System Earth at Greenhouse times

Geologia Croatica, 2016
The sedimentary record is an inexhaustible repository of information on global climates. The study of the documents of past climate changes may help to understand not only the causes and presumable effects of the current change, but also to reveal ...
Andrea Mindszenty
doaj   +1 more source

Sedimentologic, Heavy Mineral and Provenance Studies of the Cretaceous Sediments in the Auchi Area of the Anambra Basin

Journal of Applied Sciences and Environmental Management, 2020
The Upper Cretaceous Deposits of the Anambra Basin has a part of its sedimentary rock deposited in the Auchi area of Edo State. Geologic field and Sedimentological studies carried out on twenty eight (28) selected samples from a section of a road–cut ...
O.A. Ilegieuno, E.J. Ighodaro, R.O. Sunny   +2 more
doaj   +1 more source

Cenozoic paleoceanography 1986: An introduction [PDF]

, 1987
New developments in Cenozoic paleoceanography include the application of climate models and atmospheric general circulation models to questions of climate reconstruction, the refinement of conceptual models for interpretation of the carbon isotope record
Arthur, Barren, Benson, Berger, Berger, Berger, Berggren, Berner, Berner, Broecker, Broecker, CLIMAP Project Members, Delmas, Emiliani, Epstein, Fischer, Gates, Haq, Hsu, Keigwin, Keller, Keller, Kennett, L. A. Mayer, Manabe, Mayer, Miller, Moore, Schneider, Scholle, Shackleton, Shackleton, Shackleton, Shackleton, Shackleton, Tappan, Vail, Vail, Vincent, Vincent, Vincent, Vincent, W. H. Berger, Wei, Woodruff   +44 more
core   +2 more sources

Instruction manual for U.S. Geological Survey sediment observers

Open-File Report, 1997
1 U.S. Geological Survey Sediment Data 1 Fundamentals of Sediment Transport 3 The U.S. Geological Survey Sediment Observer's Duties 11 When to Sample 11 How to Sample 15 Communication with the U.S. Geological Survey 31 Safety 31 Summary 33 References 33 FIGURES 1. Diagram showing example of published U.S.
openaire   +2 more sources

Erosional and depositional history of central Chryse Planitia [PDF]

This map uses high resolution image data to assess the detailed depositional and erosional history of part of Chryse Planitia. This area is significant to the study of the global geology of Mars because it represents one of only two areas on the martian ...
Crumpler, L. S.
core   +1 more source

Modeling pN2 through Geological Time: Implications for Planetary Climates and Atmospheric Biosignatures [PDF]

, 2016
Nitrogen is a major nutrient for all life on Earth and could plausibly play a similar role in extraterrestrial biospheres. The major reservoir of nitrogen at Earth's surface is atmospheric N2, but recent studies have proposed that the size of this ...
Buick, R., Johnson, B., Kipp, M. A., Koehler, M. C., Schwieterman, E. W., Stüeken, E. E.   +5 more
core   +2 more sources

Discovery of giant and conventional magnetofossils bookending Cretaceous Oceanic Anoxic Event 2

Communications Earth & Environment
Conventional magnetofossils are the remains of magnetotactic bacteria and giant magnetofossils are the remains of iron biomineralizing organisms that have not yet been identified. We report the oldest robust conventional and giant magnetofossil records, ~
Courtney L. Wagner, Ioan Lascu, Jean M. Self-Trail, Tim Gooding, Kenneth J. T. Livi, Gianna Greger, Kristina Gardner, Jody Wycech, Mark Dreier, Tom Oliver   +9 more
doaj   +1 more source