Results 271 to 280 of about 2,871,358 (352)

Confirmation of the impact origin of the Late Ordovician Tvären impact structure (southeast Sweden) and emplacement of impactites in a marine setting

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract The Tvären structure in southeastern Sweden has been listed as a confirmed marine‐target impact structure for decades. However, to date, no measurements and/or indexed data of planar deformation features in quartz grains from the structure have been published or any other unequivocal evidence of impact.
Katarzyna J. Gajewska   +6 more
wiley   +1 more source

The Demographic and Social Construction of Super‐Diversity

open access: yesPopulation and Development Review, EarlyView.
Abstract The concept of super‐diversity posits that waves of immigration over several decades expand population heterogeneity on multiple social, demographic, economic, political, and legal dimensions, creating a mosaic of social and cultural life in immigrant‐rich spaces.
James O'Donnell, James Raymer
wiley   +1 more source

Bio‐mediated cementation of supratidal beach sediments associated with groundwater springs

open access: yesSedimentology, EarlyView.
ABSTRACT The formation of beachrock, sensu stricto, via carbonate precipitation in the intertidal zone is widespread throughout the tropics and subtropics. While cementation of supratidal beach sediments has also been noted in several locations, it has received much less attention.
Thomas William Garner   +1 more
wiley   +1 more source

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