Results 101 to 110 of about 20,360 (229)

Bedrock geology of the northern Columbia Plateau and adjacent areas [PDF]

The Columbia Plateau is surrounded by a complex assemblage of highly deformed Precambrian to lower Tertiary continental and oceanic rocks that reflects numerous episodes of continental accretion.
Swanson, D. A., Wright, T. L.
core   +1 more source

Statewide Intensification of Harmful Algal Blooms Across California Lakes and Reservoirs

GeoHealth, Volume 10, Issue 4, April 2026.
Abstract Monitoring cyanobacteria is crucial for assessing water quality, safeguarding public health, and understanding ecosystem dynamics impacted by harmful algal blooms. This study explores the potential of satellite remote sensing (SRS) to assess risks of cyanotoxin exposure in California's recreational waters from 2002 to 2011 and 2016 to 2023 ...
Brittany N. Barreto Martinez, Erin L. Hestir, Marc W. Beutel, Christine M. Lee   +3 more
wiley   +1 more source

Mantle Dynamic Topography of the Fringing Oceanic Basins of Antarctica

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract Dynamic mantle processes are known to influence oceanic basins with implications for ocean circulation and climate. This study exploits an interdisciplinary approach to probe present‐day mantle and lithosphere beneath Antarctica's fringing oceanic basins to better understand sub‐crustal processes and implications for the continental realm.
A. C. A. Dunn, N. J. White, R. Larter, P. L. Slay, M. C. Holdt   +4 more
wiley   +1 more source

Anatomy of the Emeishan Mantle Plume Head: Insights From New Geochronologic, Geochemical, and Geologic Data

Geochemistry, Geophysics, Geosystems
The link between mantle plumes and the formation of large igneous provinces (LIPs) is well established although the anatomy of these remains equivocal. Recent experimental studies and geophysical data suggest that the mantle plume head is more likely to ...
Hongbo Li, Zhaochong Zhang, Ran Liu, Marc K. Reichow, Jiang Zhu, Richard Ernst, M. Santosh, Wei Wang, Changquan Li, Botong Li   +9 more
doaj   +1 more source

Were There Tides on Ancient Mars?

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Tides are a key component in the Earth system as they help regulate climate and sustain life. Mars very likely had a surface ocean around 4–3 billion years ago. The NASA Curiosity Rover and the CNSA Zhurong Rover were sent to Gale Crater and the Vastitas Borealis Formation (VBF) on Mars to explore the surface and search for evidence of the ...
M. Jolley, M. Gugliotta, J. A. M. Green
wiley   +1 more source

Role of Large Igneous Provinces in continental break-up varying from “Shirker” to “Producer”

Communications Earth & Environment
Traditionally, the emplacement of the Large Igneous Provinces (LIPs) is considered to have caused continental break-up. However, this does not always seem to be the case, as illustrated by, for example, the Siberian Traps, one of the most voluminous ...
Alexander Koptev, Sierd Cloetingh
doaj   +1 more source

The Spectroscopic Impact of Sublimation Under Martian Surface Conditions: Implications for Sample Analysis by the Rosalind Franklin Rover and Biosignature Preservation

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract The 2028 ESA/NASA Rosalind Franklin Mission (RFM) will search for signs of past and present life in the shallow subsurface of Mars. It is crucial to understand how minerals and any biosignatures uncovered during these sampling activities might change and be identified under today's Martian conditions.
Louisa J. Preston, Charles H. Minns, Ifigeneia Rousouli, Connor J. Ballard, Sadiazannat Mirdha, Lewis R. Dartnell   +5 more
wiley   +1 more source

Mercury's Tectonic and Geodynamic History: 2. Contribution of Membrane–Flexural Strains to the Tectonic Record

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Previous analyses of Mercury's tectonic record have arrived at widely varying amounts of global contraction. Contraction also varies spatially, with some regions displaying a near‐zero record of contraction. Here, we investigate the contribution of membrane–flexural strain from lithosphere loading to the tectonic record.
A. Broquet, J. C. Andrews‐Hanna
wiley   +1 more source

MEVTV Workshop on Tectonic Features on Mars [PDF]

The state of knowledge of tectonic features on Mars was determined and kinematic and mechanical models were assessed for their origin. Three sessions were held: wrinkle ridges and compressional structure; strike-slip faults; and extensional structures ...
Golombek, Matthew P., Watters, Thomas R.
core   +1 more source

Impact vesiculation – a new trigger for volcanic bubble growth and degassing [PDF]

, 2007
We highlight a potentially important trigger for bubble growth and degassing in volcanic bombs. We have successfully triggered bubble growth in previously unvesiculated samples of silicate melt during experiments to simulate volcanic bomb impact, by ...
Dingwell, D. B., Rothery, D. A., Spiler, O., Sumner, J. M.   +3 more
core   +1 more source