Results 111 to 120 of about 20,360 (229)

Flood basalts and extinction events

open access: yesGeophysical Research Letters, 1993
The largest known effusive eruptions during the Cenozoic and Mesozoic Eras, the voluminous flood basalts, have long been suspected as being associated with major extinctions of biotic species. Despite the possible errors attached to the dates in both time series of events, the significance level of the suspected correlation is found here, by an ...
openaire   +1 more source

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

open access: yesSedimentology, Volume 73, Issue 3, Page 802-837, April 2026.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti   +5 more
wiley   +1 more source

Geologic structure of shallow maria [PDF]

open access: yes
Isopach maps and structural contour maps of the eastern mare basins (30 deg N to 30 deg S; 0 deg to 100 deg E), constructed from measurements of partially buried craters, are presented and discussed.
Dehon, R. A., Waskom, J. A.
core   +1 more source

Volcanic forcing from two sides : Drainage and plant ecosystem development in the Columbia River Flood Basalt Province, Washington State [PDF]

open access: yes, 2014
Peer reviewedPublisher ...
Ebinghaus, Alena   +2 more
core  

Paleohydraulics and hydrodynamics of Scabland floods [PDF]

open access: yes
The last major episode of scabland flooding (approx. 18,000-13,000 years B.P.) left considerable high-water mark evidence in the form of: (1) eroded channel margins; (2) depositional features; (3) ice-rafter erratics; and (4) divide crossings. These were
Baker, V. R.
core   +1 more source

Age discrimination among basalt flows using digitally enhanced LANDSAT imagery [PDF]

open access: yes
Digitally enhanced LANDSAT MSS data were used to discriminate among basalt flows of historical to Tertiary age, at a test site in Northwestern Saudi Arabia.
Blodget, H. W., Brown, G. F.
core   +1 more source

An Introduction to SGTPPR: Sparse Geochemical Tectono‐Magmatic Setting Probabilistic MembershiP DiscriminatoR

open access: yesGeochemistry, Geophysics, Geosystems
We present a new and easy‐to‐use geochemical tectono‐magmatic setting discriminator to calculate the probability of membership (the Sparse Geochemical Tectono‐magmatic setting Probabilistic membershiP discriminatoR, SGTPPR) that runs in Excel. It outputs
Kenta Ueki   +2 more
doaj   +1 more source

The Channeled Scabland [PDF]

open access: yes
The geomorphology and hydrodynamics of high velocity flood erosion in the channeled scabland of the Columbia Basin are ...
Baker, V. R., Nummedal, D.
core   +1 more source

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