Results 91 to 100 of about 9,762 (210)

Where geology meets pedology: Late Quaternary tephras, loess, and paleosols in the Mamaku Plateau and Lake Rerewhakaaitu areas [PDF]

, 2012
On this trip we focus on tephrostratigraphy and soil stratigraphy together with aspects of palaeoenvironmental reconstruction over long and short time-spans.
Lanigan, Kerri Miriam, Lowe, David J., Palmer, David John   +2 more
core  

Revised calendar date for the Taupo eruption derived by ¹⁴C wiggle-matching using a New Zealand kauri ¹⁴C calibration data set [PDF]

, 2011
Taupo volcano in central North Island, New Zealand, is the most frequently active and productive rhyolite volcano on Earth. Its latest explosive activity about 1800 years ago generated the spectacular Taupo eruption, the most violent eruption known in ...
Boswijk, Gretel, Hogg, Alan G., Lowe, David J., Palmer, Jonathan G., Ramsey, Christopher Bronk   +4 more
core   +2 more sources

Tracking Deep Magma Migration Through Diffuse CO2 Degassing: Insights From Piton de la Fournaise Volcano (2013–2023)

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract Volcano monitoring requires identifying and distinguishing physico‐chemical processes at various depths within magma plumbing systems and their links to volcanic activity. Long‐term monitoring of deep magma reservoirs, extending down to tens of kilometers, is crucial even though signals from these depths are often altered or attenuated before ...
B. Bénard, A. Di Muro, A. Finizola, A. Peltier, V. Ferrazzini, I. Vlastelic, P. Besson, V. Famin, R. Gusset, K. Mussard, P. Kowalski, P. Boissier, C. Brunet, F. Lauret, N. Desfete, C. Griot, M. Liuzzo, S. Gurrieri, G. Giudice, F. Grassa, M. Longo   +20 more
wiley   +1 more source

Natural and anthropogenic lead in sediments of the Rotorua lakes, New Zealand [PDF]

, 2010
Global atmospheric sources of lead have increased more than 100-fold over the past century as a result of deforestation, coal combustion, ore smelting and leaded petroleum. Lead compounds generally accumulate in depositional areas across the globe where,
Balance, Bindler, Burns, Burns, C.H. Hendy, Chow, D.P. Hamilton, Davies, Edgington, Eisenreich, Fish, Flint, Graney, Harrison, Hogg, Hong, Håkanson, L.K. Pearson, Lowe, Lowe, Martin, McColl, McColl, McColl, Ministry of Commerce, Monna, Murozuni, Newnham, Nriagu, Pullar, R.C. Pickett, Renberg, Renberg, Rosman, Schindler, Settle, Settle, Shen, Shotyk, Sigg, Statistics New Zealand, Sturges, Timperley, Timperley, Trolle, Veron, Vincent, Wilson   +47 more
core   +2 more sources

In Situ Carbonation of Sedimentary and Igneous Rocks of Ultramafic Composition in Jezero Crater, Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Over 3.5 years of exploration in Jezero Crater, the Perseverance rover has explored several geological units of diverse origins and natures, performing multi‐technique remote analyses of the chemistry and mineralogy of rocks with the SuperCam instrument suite.
E. Clavé, O. Beyssac, P. Beck, C. Royer, L. Mandon, N. Mangold, O. Forni, E. Dehouck, C. Bedford, A. Udry, S. Schröder, S. Bernard, C. Quantin‐Nataf, M. Loche, J. Aramendia, A. Brown, G. Caravaca, E. Cardarelli, L. Coloma, S. A. Connell, T. Fouchet, J. R. Johnson, G. Lopez‐Reyes, J. M. Madariaga, J. A. Manrique, S. Maurice, P.‐Y. Meslin, S. Le Mouélic, A. M. Ollila, P. Pilleri, C. Pilorget, K. Rammelkamp, F. Seel, J. I. Simon, U. Wolf, A. Zastrow, S. Clegg, O. Gasnault, R. C. Wiens, A. Cousin   +39 more
wiley   +1 more source

Arc-to-craton: Devonian air-fall tephras in the eastern United States [PDF]

, 2020
ABSTRACT More than 100 air-fall volcanic tephra beds are currently documented from Devonian strata in the eastern United States. These beds act as key sources of various geological data. These include within-basin to basin-to-basin correlation, globally useful geochronologic age dates, and a relatively detailed, if incomplete, record of ...
C.A. Ver Straeten*, D.J. Over*, G.C. Baird*   +2 more
openaire   +1 more source

Testing the Limits of Provenance Analysis From Basaltic Fluvial Sediment Near Sandvatn, Iceland, as a Mars Analog

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Detrital sediments that accumulate downstream and are preserved in sedimentary rocks can allow characterization of geologic formations that are inaccessible for spatial or temporal reasons. However, mixing, sorting, and alteration of sediment during transport may complicate reconstruction of protolith characteristics.
Audrey R. Putnam, Kirsten L. Siebach, Michael T. Thorpe, Valerie M. Tu, Elizabeth B. Rampe, Candice C. Bedford, Gelu Costin, Joseph J. Tamborski   +7 more
wiley   +1 more source

Facies Characterization and Volcanic Source Assignment of Marine Tephra Deposits Around São Miguel Island, Azores Archipelago

Geochemistry, Geophysics, Geosystems
Long‐term tephrostratigraphies of volcanic islands such as the Azores are often limited to young and incomplete subaerial records. Here, we present a Pleistocene‐Holocene marine tephra archive around the eastern islands of the Azores based on 22 marine ...
J. C. Schindlbeck‐Belo, M. Andrade, J. Kling, S. Kutterolf, A. Pimentel, E. Lebas, A. Freundt, K. Pank, T. H. Hansteen   +8 more
doaj   +1 more source

Tephrochronology: principles, functioning, application [PDF]

, 2011
Tephrochronology is a unique method for linking and dating geological, palaeoecological, palaeoclimatic or archaeological sequences or events. The method relies firstly and fundamentally on stratigraphy and the law of superposition, which apply in any ...
Lowe, David J.
core   +1 more source

Terrestrial Regulation of Lacustrine Hg Deposition During Glacial‐Interglacial Cycles

Paleoceanography and Paleoclimatology, Volume 41, Issue 4, April 2026.
Abstract Mercury (Hg) is a toxic trace metal. It is clear that its natural cycle has been highly disturbed by human activities, but there remains much to understand about how it operated before these perturbations. For example, the influences of glacial‐interglacial climate changes on the geochemical cycle of environmental Hg remain poorly understood ...
Alice R. Paine, Joost Frieling, Bernd Wagner, Alexander Francke, Jack H. Lacey, Tamsin A. Mather, Stuart A. Robinson, David M. Pyle   +7 more
wiley   +1 more source