Results 191 to 200 of about 211,638 (344)

A new geomagnetic polarity time scale for the Late Cretaceous and Cenozoic

, 1992
S. Cande, D. Kent
semanticscholar   +1 more source

Assessment and Correction of Non‐Linearity Effects for In Situ Rb‐Sr Geochronology Applied to High 87Rb/86Sr Mica

Geostandards and Geoanalytical Research, EarlyView.
Key Points Measurement of 86Sr at count rates < 1500 cps can result in statistical bias. Non‐linear signals in analogue detection mode (e.g., Rb) present a challenge for accurately dating high 87Rb/86Sr mica (> 1000). Accounting for these considerations, high 87Rb/86Sr mica are dated here with accuracies of ∼ 1%.
Duane C. Petts, William J. Davis, Simon E. Jackson, Jamie A. Cutts, Janina Czas, Alfredo Camacho   +5 more
wiley   +1 more source

Obligate faunivorous megatheropod size class patterns across the Jurassic-Cretaceous Periods. [PDF]

PeerJ
Boisvert C, Perkins J, Morrison C, Gascoigne SJL, Holtz TR, Curtice B.   +5 more
europepmc   +1 more source

Predicting Groundwater Hydrochemical Facies in Three Dimensions with Random Forest Classification, USA

Groundwater, EarlyView.
Random forest classification predictions of groundwater hydrochemical facies (HCFs) can be used for multiple purposes, including the mapping of salinity and other groundwater characteristics. Shown on the figure are predictions of HCFs at the water table across the conterminous United States.
Paul E. Stackelberg, Katherine J. Knierim, Kenneth Belitz, Charles A. Cravotta III, R. Blaine McCleskey, Courtney D. Killian   +5 more
wiley   +1 more source

Orogeny and topography influenced Jurassic-Cretaceous terrestrial ecosystem evolution in northeastern Asia. [PDF]

Natl Sci Rev
Wang N, Zhang Z, Luffi P, Li Z, Spicer RA, Yu Z, Wan B, Zhu JJ, Zhang J, Ao S, Song D, Xiang D, Guo C, Xiao W.   +13 more
europepmc   +1 more source

Toward the astronomical calibration of the Cretaceous : the Maastricthian (Late Cretaceous) and Cretaceous-Paleogene boundary

, 2010
L'approche cyclostratigraphique, qui repose sur l'analyse des cyclicités sédimentaires et l'étude de leurs relations avec les évolutions des paramètres orbitaux de la Terre, a été employée ici dans le but de construire une échelle de temps astronomique pour le Maastrichtien.
openaire   +1 more source

Enhancing Recharge in the Edwards Aquifer, Texas: Measures, Outcomes, and Lessons for Karst Aquifers

Groundwater, EarlyView.
Abstract Managed aquifer recharge is a widely adopted method that involves storing excess water underground for future use. While managed aquifer recharge has been applied globally to different aquifer types, its use in karst aquifers is less common due to the unique hydrogeological characteristics of these systems, including high permeability ...
Neelam Thapa Magar, Robert E. Mace
wiley   +1 more source

The landscape of evolution. [PDF]

Natl Sci Rev
Ducea MN.
europepmc   +1 more source

Flammable biomes dominated by eucalypts originated at the Cretaceous-Palaeogene boundary.

Nature Communications, 2011
M. Crisp, G. Burrows, L. Cook, A. Thornhill, D. Bowman   +4 more
semanticscholar   +1 more source

Bony fish genomes: Status and gaps

Journal of Fish Biology, EarlyView.
Abstract Bony fish constitute an exceptionally species‐rich group of aquatic vertebrates, comprising more than 95% of all living fish. The adaptive processes on the diversity of environments they inhabit make them a highly diverse group from taxonomic, morphological and evolutionary standpoints.
Noelia Pérez‐Pereira, Carmen Bouza, Paulino Martínez, Diego Robledo   +3 more
wiley   +1 more source