Results 151 to 160 of about 3,528,122 (352)

Subglacial landscape formation and sediment discharge: relating basal conditions to bedform dimensions and properties at Rutford Ice Stream, West Antarctica

Boreas, EarlyView.
Basal conditions that facilitate fast ice flow are still poorly understood and their parameterization in ice‐flow models results in high uncertainties in ice‐flow and consequent sea‐level rise projections. Direct observations of basal conditions beneath modern ice streams are limited due to the inaccessibility of the bed.
Rebecca Schlegel, Lucas K. Zoet, Adam D. Booth, Andrew M. Smith, Roger A. Clark, Alex M. Brisbourne   +5 more
wiley   +1 more source

An updated chronology for Umbeli Belli and its implications for the Middle and Later Stone Ages

South African Journal of Science
We present a series of 12 OSL/IRSL dates that revise and complete the chronology of the important Middle (MSA) and Later Stone Age (LSA) site Umbeli Belli in KwaZulu-Natal, South Africa. These dates shift the previous radiometric ages thousands of years
Chantal Tribolo, Nicholas J. Conard, Matthias Blessing, Gregor D. Bader   +3 more
doaj   +1 more source

OSL Characterisation of Two Fluvial Sequences of the River Usmacinta in its Middle Catchment (SE Mexico) [PDF]

, 2014
The report summarizes luminescence profiling, initially using a SUERC PPSL system in Mexico, and laboratory analysis at SUERC, used to characterise the stratigraphy and interpret sedimentary processes in terrace deposits of the Usumacinta River, SE ...
Castillo Rodriguez, Miguel, Cruz-Zaragoza, Epifanio, Kinnaird, Tim C., Muñoz-Salinas, Esperanza, Sanderson, David C.W.   +4 more
core  

Automated delineation and morphometry of unclassified subglacial bedforms

Boreas, EarlyView.
We present an automated tool for mapping and analysing subglacial bedforms using volumetric obscurance, without classification. Tested on ArcticDEM data, the method produces bedform outlines with 75% correspondence compared to manually digitized maps.
Sofyane Hesni, Paul Bessin, Edouard Ravier, Olivier Bourgeois, Jean Vérité, Jean‐François Buoncristiani   +5 more
wiley   +1 more source

The morphosedimentary record of glacial to postglacial environmental changes in West Wiyâshâkimî impact crater lake and adjacent areas, northern Québec, Canada

Boreas, EarlyView.
Crater lakes in core regions of former ice sheets have the potential to preserve long‐term sedimentary archives that are otherwise rare in glaciated landscapes due to pervasive glacial erosion. Lake Wiyâshâkimî, an impact crater lake located in the inner core of the Québec‐Labrador Dome of the Laurentide Ice Sheet, provides a rare example of such a ...
Etienne Brouard, Patrick Lajeunesse
wiley   +1 more source

Thought of full-stratigraphy and its practice in ground control

Meitan xuebao
Ground control is a science of mitigating or eliminating mining damage by controlling the breaking motion of mining rock strata, with the aim of ensuring safe, efficient and green mining.
Jialin XU, Weibing ZHU, Dayang XUAN, Xiaozhen WANG, Wei QIN, Hongwei JIN, Jinfeng JU, Guozhong HU, Jianlin XIE, Qingdong QU, Renlun WU, feng WANG, Changchun HE, Zhu LI   +13 more
doaj   +1 more source

BILOZERSKA SERIES OF THE UKRAINIAN SHIELD: PROBLEMS OF STRATIGRAPHY AND CORRELATION

, 2023
V.V. Pokalyuk, О.B. Bobrov, V.G. Verkhovtsev   +2 more
openalex   +2 more sources

Comments on ‘Late Middle Pleistocene Wolstonian Stage (MIS 6) glaciation in lowland Britain and its North Sea regional equivalents – a review’

Boreas, EarlyView.
Divergent views debated over the past 20 years on the Wolstonian depositional record of Fenland and the Peterborough area have centred on whether there is evidence of a single (middle or late) glaciation or of both a middle and a late glaciation. A recent review promoted a single late Wolstonian glaciation, despite there being incontrovertible evidence
Harry E. Langford
wiley   +1 more source

Integrated stratigraphy of the Lutetian–Priabonian pelagic section at Bottaccione (Gubbio, central Italy): A proposal for defining and positioning the Global Stratotype Section and Point (GSSP) for the base of the Bartonian Stage (Paleogene System, Eocene Series)

, 2022
Rodolfo Coccioni, Alessandro Montanari, Samuele Boschi, Rita Catanzariti, Fabrizio Frontalini, Luigi Jovane, Marcus V.L. Kochhann, Nicola Pelosi, Nadia Sabatino, Jairo F. Savian, Mario Sprovieri   +10 more
openalex   +2 more sources

Are regional stages necessary? [PDF]

, 2005
The bipartition of the Carboniferous System adopted by the International Commission of Stratigraphy for the world stratigraphic chart is impractical in Gondwana.
Gonzalez, Carlos Roberto
core