Results 61 to 70 of about 1,792 (166)

Palaeomagnetism of red beds of the Late Devonian Worange Point Formation, SE Australia [PDF]

, 1991
Gently folded strata of the Late Devonian Merrimbula Group along the south coast of New South Wales are similar to numerous deposits of Late Devonian to Early Carboniferous, subaerial to shallow marine, quartzose sandstone that are known as the Lambie ...
Kent, Dennis V., Powell, C. McA., Schmidt, P. W., Thrupp, G. A.   +3 more
core   +2 more sources

New Permian Paleomagnetic and Geochronologic Results From the Alxa Block: Constraints on Its Tectonic Affinity and the Closure of Paleo‐Asian Ocean

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract The Paleo‐Asian Ocean's (PAO) closure timing and the Alxa Block's (ALB) tectonic affinity remain debated. We present new paleomagnetic and geochronologic data from Permian volcanic and sedimentary rocks in the ALB. Characteristic remanent magnetization (ChRM) directions from Early (∼282 Ma), Middle (∼268 Ma), and Late Permian (∼255 Ma) rocks ...
Wei Xu, Bo Song, Jizhong Shi, Yan Li, Baowen Wang, Xiaozhou Ye, Xiaofeng Han, Haihong Xu, Yunpeng Zhang, Huiyuan Zhang, Zhiming Sun   +10 more
wiley   +1 more source

First Rock Magnetic and Palaeomagnetic Analyses of the Pre-Cenozoic Rocks of the Velebit Mt. (Croatia): Prospects for Applications in Palaeogeographic and Geotectonic Studies

Geologia Croatica, 2011
Post-Carboniferous deposits of the Karst Dinarides were analysed in terms of their palaeomagnetic and rock magnetic properties in order to identify the best sections for comprehensive palaeomagnetic studies on geodynamic and palaeogeographic evolution of
Marek Lewandowski, Ivo Velić, Magdalena Sidorczuk, Igor Vlahović, Josipa Velić   +4 more
doaj   +1 more source

Toward Calibrating for Bottom Water Oxygenation Using Magnetofossils: New Insights From Southeast Atlantic and Northeast Pacific Surface Sediments

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract Accurate estimation of past ocean oxygen concentrations is vital for understanding the ocean's response to global climate change, but proxies for reconstructing bottom water oxygen (BWO) are limited. Magnetofossils, produced by magnetotactic bacteria, are sensitive to redox conditions in various environments.
Pengfei Xue, Liao Chang, Rong Huang, Babette A. A. Hoogakker, Liang Yi   +4 more
wiley   +1 more source

Magnetic properties of Lake Lisan and Holocene Dead Sea sediments and the fidelity of chemical and detrital remanent magnetization

, 2006
We have studied the magnetic properties of wet and dry late Pleistocene Lake Lisan sediments and the Holocene Dead Sea sediments. Our initial prediction was that the properties of both would be quite similar, because they have similar source and lake conditions, unless diagenetic change had occurred. Rock magnetic and paleomagnetic experiments revealed
Ron, H., Nowaczyk, N., Frank, U., Marco, S., McWilliams, M.   +4 more
openaire   +3 more sources

Iron mineralogy and redox conditions during deposition of the mid-Proterozoic Appekunny Formation, Belt Supergroup, Glacier National Park [PDF]

, 2016
The redox state of the mid-Proterozoic oceans, lakes, and atmospheres is still debated, but it is vital for understanding the emergence and rise of macroscopic organisms and eukaryotes.
Fischer, Woodward W., Kirschvink, Joseph L., Slotznick, Sarah P., Webb, Samuel M., Winston, Don   +4 more
core  

First Paleomagnetic Results From Late Triassic Volcanic Rocks of the Yidun Terrane, Eastern Tibetan Plateau: Constraints on the Closure of the Paleo‐Tethys Ocean

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract To constrain the temporal and spatial evolution of the Ganzi‐Litang Paleo‐Tethys Ocean, this study presents the first paleomagnetic results from Late Triassic volcanic rocks in the Yidun terrane in the eastern Tibetan Plateau. The mean paleomagnetic direction for 27 sites is Ds = 39.2°, Is = −52.9°, κs = 42.2, α95 = 4.3°, and the paleomagnetic
Yong Cao, Zhiming Sun, Haibing Li, Xinwen Cao, Xiaozhou Ye, Yuhan Yang, Lei Zhang, Yang Gao   +7 more
wiley   +1 more source

Untangling inconsistent magnetic polarity records through an integrated rock magnetic analysis: A case study on Neogene sections in East Timor

Geochemistry, Geophysics, Geosystems, 2014
Inconsistent polarity patterns in sediments are a common problem in magnetostratigraphic and paleomagnetic research. Multiple magnetic mineral generations result in such remanence “haystacks.” Here we test whether end‐member modeling of isothermal ...
F. M. Aben, M. J. Dekkers, R. R. Bakker, D. J. J. van Hinsbergen, W. J. Zachariasse, G. W. Tate, N. McQuarrie, R. Harris, B. Duffy   +8 more
doaj   +1 more source

Long-term evolution of an Oligocene/Miocene maar lake from Otago, New Zealand [PDF]

, 2015
Foulden Maar is a highly resolved maar lake deposit from the South Island of New Zealand comprising laminated diatomite punctuated by numerous diatomaceous turbidites.
Adams, Anderson, B. R. S. Fox, Bahadori, Bannister, Berner, Blanchet, Canfield, Clark, Coombs, Coombs, Craw, Crusius, D. E. Lee, Dekkers, Egli, Evans, F. E. Nelson, Forsyth, G. S. Wilson, Graham, Gunsinger, Hay, Heslop, Heslop, Hoernle, Horng, J. Wartho, Jiang, Kruiver, Larrasoaña, LeMasurier, Lindqvist, Liu, Lorenz, Lowrie, Mildenhall, Miller, Peters, Peters, Pirrung, Reichgelt, Reynolds, Roberts, Roberts, Roberts, Robertson, Snowball, Steiger, Sutherland, Symons, Thompson, Torii, Turrin, Turrin, Turrin, Turrin, Tuttle, U. Kaulfuss, Urbat, Vaughan, Weaver, Weeks, White, Wilkin, Williams, Wilson, Zachos   +67 more
core   +2 more sources

Ice‐Rafted Detritus of the Southeast Grand Banks Slope, Newfoundland, Throughout Heinrich Layers 1 to 5a: 2. Magnetic Properties

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 10, October 2025.
Abstract Ocean‐wide “Heinrich event” layers marked by weakly magnetic dolomitic ice‐rafted detritus (IRD) from the Hudson Bay region are a prominent signature of Laurentide Ice Sheet surges. Contrary to intuition, the Heinrich layers of the Ruddiman Belt IRD exhibit maxima of magnetic susceptibility. Building on IRD petrology and abundance in sediments
S. Bukar, T. von Dobeneck, Y. Wang, L. Max, T. Frederichs, E. Dallanave, G. St‐Onge   +6 more
wiley   +1 more source