Results 51 to 60 of about 8,453 (202)

Fallen and Lost into the Abyss? A Mesolithic Human Skull from Sima Hedionda IV (Casares, Málaga, Iberian Peninsula)

Open Archaeology, 2022
The presence of scattered prehistoric human bones in caves and sinkholes is common in many regions of Iberia. These are usually interpreted as erratic elements coming from burial contexts, usually collective associations.
Martinez-Sanchez Rafael M., Bretones-García María Dolores, Valdiosera Cristina, Vera-Rodríguez Juan Carlos, López Flores Inmaculada, Simón-Vallejo María D., Ruiz Borrega Pilar, Martínez Fernández María J., Romo Villalba Jorge L., Bermúdez Jiménez Francisco, Martín de los Santos Rafael, Pardo-Gordó Salvador, Cortés Sánchez Miguel   +12 more
doaj   +1 more source

Sedum zhenghaianum (Crassulaceae), a new species from Zhejiang and Jiangxi, East China

Nordic Journal of Botany, EarlyView.
In this paper, Sedum zhenghaianum sp. nov. is described as a new species based on morphological and molecular analyses, and its taxonomic relationships are discussed. Morphological analysis indicates that S. zhenghaianum should be classified in the genus Sedum sect. Sedum and is distinct from the related species S. tosaense in morphology, e.g.
Shi‐Qi She, Shi‐Guo Huang, Yang Zhang, Shen‐Hao Yao, Zong‐Wei Zhu, Xin Zhou, Yue‐Liang Xu   +6 more
wiley   +1 more source

Sinkhole Detection and Characterization Using LiDAR-Derived DEM with Logistic Regression

Remote Sensing, 2019
Depressions due to sinkhole formation cause significant structural damages to buildings and civil infrastructure. Traditionally, visual inspection has been used to detect sinkholes, which is a subjective way and time- and labor-consuming.
Yong Je Kim, Boo Hyun Nam, Heejung Youn   +2 more
doaj   +1 more source

On the Use of Tri-Stereo Pleiades Images for the Morphometric Measurement of Dolines in the Basaltic Plateau of Azrou (Middle Atlas, Morocco)

Remote Sensing, 2021
Hundreds of large and deep collapse dolines dot the surface of the Quaternary basaltic plateau of Azrou, in the Middle Atlas of Morocco. In the absence of detailed topographic maps, the morphometric study of such a large number of features requires the ...
Maria Teresa Melis, Luca Pisani, Jo De Waele   +2 more
doaj   +1 more source

Evolution of sinkholes over Wink, Texas, observed by high-resolution optical and SAR imagery

Remote Sensing of Environment, 2019
Two caprock and cover collapse sinkholes, Wink Sinks #1 and #2, in Winkler County, Texas, collapsed in 1980 and 2002, respectively. They are located in a region underlain by the Salado Formation on the eastern edge of the Delaware Basin.
Jinwoo Kim, Zhong Lu, J. Kaufmann
semanticscholar   +1 more source

Estimation of Excess Ice and Thaw Settlement in Frozen Soil Using Industrial Computed Tomography

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Permafrost thaw can induce terrain instabilities and hazards as a result of the loss of excess ice from host sediments. The loss of excess ice threatens the integrity of infrastructure and drives ecosystem changes across northern landscapes. This study tests a nondestructive approach to estimate excess ice and potential thaw settlement using ...
Jordan Harvey, Mahya Roustaei, Joel Pumple, Evan Francis, Duane Froese   +4 more
wiley   +1 more source

Ongoing Deformation of Sinkholes in Wink, Texas, Observed by Time-Series Sentinel-1A SAR Interferometry (Preliminary Results)

Remote Sensing, 2016
Spatiotemporal deformation of existing sinkholes and the surrounding region in Wink, TX are probed using time-series interferometric synthetic aperture radar (InSAR) methods with radar images acquired from the Sentinel-1A satellite launched in April 2014.
Jin-Woo Kim, Zhong Lu, Kimberly Degrandpre   +2 more
doaj   +1 more source

Extended Strahler Ordering to Distinguish Mapped River Channels From Overland Flow Pathways and Consistently Compare Digital Networks

River Research and Applications, EarlyView.
ABSTRACT Digital networks are virtual representations of freshwater systems that provide important inputs to, and mapping of, river classifications, simulation models, and quantitative data analyses for policy, planning, and management. Strahler order has often been used to characterize network configuration and as a proxy indicator of river channel ...
Doug Booker, Matt Wilkins, Clare Wilkinson, Rachel Smith   +3 more
wiley   +1 more source

An Exploratory Study of Mayoral Transition Work

Public Administration Review, EarlyView.
ABSTRACT A new mayor's transition period is widely regarded as important to their overall success, yet mayoral transitions have received little research attention. This exploratory, mixed‐method study of 15 newly elected U.S. mayors combines primary survey data of time use with two waves of mayoral interviews to illuminate the nature and purposes of ...
Matthew Lee, Quinton Mayne, Jorrit de Jong   +2 more
wiley   +1 more source

Past and Present Drivers of Karst Formation of Ciénega de El Mangle, Panama

Quaternary, 2023
Tropical coastal karst areas represent dynamic, fragile, and biodiverse environments. Central America’s karst regions have been scarcely studied, with most of the research focused on the northern part of the region and on several larger cave systems. The
Jaime Rivera-Solís, Adolfo Quesada-Román, Fran Domazetović   +2 more
doaj   +1 more source