Results 81 to 90 of about 856,490 (172)

Mount Mazama and Crater Lake [PDF]

open access: yesJournal of Geography, 1913
n ...
openaire   +1 more source

The Zooplankton International Geospatial dataset: A global repository of spatiotemporal freshwater zooplankton community composition data from lakes and reservoirs to support ecological research

open access: yesLimnology and Oceanography Letters, Volume 11, Issue 5, September 2026.
Abstract Zooplankton transfer substantial energy in aquatic food webs and are used as indicators of environmental change. Syntheses of zooplankton community dynamics globally require datasets that span a wide range of environmental gradients; however, these datasets are limited due to methodological differences across programs, taxonomic ...
Stephanie E. Figary   +142 more
wiley   +1 more source

Anatomy of phreatic eruptions

open access: yesEarth, Planets and Space, 2018
This study investigates phreatic eruptions at two similar volcanoes, Kawah Ijen (Indonesia) and White Island (New Zealand). By carefully processing broadband seismic signals, we reveal seismic signatures and characteristics of these eruptions.
Corentin Caudron   +8 more
doaj   +1 more source

Speciation with gene flow

open access: yesPLANTS, PEOPLE, PLANET, Volume 8, Issue 5, Page 1476-1499, September 2026.
Biodiversity is threatened by human activities, with extinction debt accumulating rapidly. Many of these activities change the connectivity of populations, fragmenting existing population systems or bringing previously isolated populations or species into contact.
Zhiqin Long   +7 more
wiley   +1 more source

Three-dimensional joint inversion of traveltime and gravity data across the Chicxulub impact crater

open access: yes, 2009
In 2005 an extensive new seismic refraction data set was acquired over the central part of the Chicxulub impact crater, allowing us to image its structure with much better resolution than before.
Morgan, J. V.   +8 more
core   +1 more source

Thermo‐Mechanical Controls on Central‐Vent Caldera Collapse

open access: yesJournal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract Large‐scale magmatic systems are associated with catastrophic caldera‐forming eruptions, posing hazards to millions near active volcanoes. Despite occurring across a range of sizes, the physics driving caldera collapse remain incompletely understood. While large calderas have received considerable attention, moderately sized calderas (∼5–10 km)
Pascal S. Aellig   +2 more
wiley   +1 more source

Stranded Assets

open access: yesColloquy: Text, Theory, Critique, 2018
The glass viewing platform jutted out over the lip of the crater. Roberta’s hands clenched around the rail as she fought a swirl of vertigo. The massive gouge yawned beneath her, stepped sides dripping with greenery cut through with walking trails.
Jason Nahrung
doaj   +1 more source

Sampling genetic diversity in the sympatrically and allopatrically speciating Midas cichlid species complex over a 16 year time series

open access: yesBMC Evolutionary Biology, 2007
Background Speciation often occurs in complex or uncertain temporal and spatial contexts. Processes such as reinforcement, allopatric divergence, and assortative mating can proceed at different rates and with different strengths as populations diverge ...
Bunje Paul ME   +2 more
doaj   +1 more source

Whump, Slosh, Slosh, Slosh—Filling the Crater That Did in the Dinosaurs

open access: yesAGU Advances, 2020
Drilling into the Chicxulub crater (Yucatan, Mexico) reveals the dramatic aftermath of the dinosaur‐killing meteorite impact. Previous views of this event have mainly come from places well away from Ground Zero, where we see the extinction of ~70% of ...
Richard Norris
doaj   +1 more source

Formation and Alteration of Magnesite Nodules From Kunwarara, Queensland, Australia, as an Analog to Mg‐Carbonate Formation on Mars

open access: yesJournal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.
Abstract Magnesite (MgCO3) is a magnesium (Mg) carbonate mineral that records the aqueous environmental conditions of its formation. On Earth, magnesite forms in metamorphic, diagenetic or pedogenic environments, and distinguishing between these environments is critical for understanding the fluid chemistry during magnesite precipitation. Mg carbonates
E. L. Cardarelli   +6 more
wiley   +1 more source

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