Results 41 to 50 of about 396 (129)

Dating late Holocene lava flows in Pico de Orizaba (Mexico) by means of in situ-produced cosmogenic 36Cl, lichenometry and dendrochronology [PDF]

open access: yes, 2018
International audienceThe knowledge of the eruptive history of volcanic centers allows for improving the evaluation of the related risks and hazards in populated areas, but substantially depends on the ability of dating the lava flows.
Schimmelpfennig, Irene   +21 more
core   +1 more source

The geomorphological role of snow since the Little Ice Age in the Sierra de Ancares (NW Spain)

open access: yesCuadernos de Investigación Geográfica, 2018
On the Pico Cuiña cirque, Sierra de Ancares (León, Spain), the seasonal snow cover undergoes both slow and rapid mass displacements. Push associated with moving snow is responsible for an intense geomorphological activity, which is characterised by the ...
P. Carrera-Gómez, M. Valcárcel
doaj   +1 more source

Photosynthetic rate and thallus size are not related in alpine yellow-green Rhizocarpon crustose lichens: Implications for lichenometry and growth [PDF]

open access: yes, 2018
Lichenometry, first proposed at the beginning of the XXth century, is a technique that uses growth rates of saxicolous crustose lichens to date exposed surfaces over an age range of 500 years from present.
Green, Thomas George Allan   +3 more
core   +1 more source

Holocene history of the Ullukam Glacier

open access: yesЛëд и снег, 2015
Using instrumental archives, aerial photographs, satellite images, old maps, descriptions of early explorers and old photographs we identified and mapped nine front positions of the Ullukam Glacier (SW slope of Elbrus) for the period from the end of XIX ...
O. N. Solomina   +4 more
doaj   +1 more source

Unexpected Fine-Scale Population Structure in a Broadcast-Spawning Antarctic Marine Mollusc [PDF]

open access: yes, 2012
Several recent empirical studies have challenged the prevailing dogma that broadcast-spawning species exhibit little or no population genetic structure by documenting genetic discontinuities associated with large-scale oceanographic features.
Peck, Lloyd S.   +15 more
core   +1 more source

ROCK GLACIERS IN THE KOLYMA HIGHLAND

open access: yesЛëд и снег, 2015
Based on remote mapping and field studies inGrand Rapids, Tumansky,Hasynsky,Del-Urechen Ridges as well as Dukchinsky and Kilgansky Mountain Massifs there were identified about 1160 landforms which morphologically are similar to the rock glaciers or they ...
A. A. Galanin
doaj   +1 more source

Lichenometry as a method and its relevance [PDF]

open access: yes, 2017
Lichenometry is a constantly developing method (or set of methods) of relative and absolute dating of geological and anthropogenic formations, based on analysis of crustose lichens. It operates with an assumption that the larger the thallus is, the older
Pelant, Filip
core  

Lichenometry and Schmidt hammer tests in the Kaunertal glacier foreland (Ötztal Alps) during the AMADEE-15 Mars Mission Simulation

open access: yesMiscellanea Geographica: Regional Studies on Development, 2017
The aim of this article is to show the results of the lichenometrical and Schmidt hammer measurements performed in 2015 during the AMADEE-15 Mars Mission Simulation in the Ötztal Alps in order to test the capabilities of analogue astronauts and collect ...
Czempiński Jan, Dąbski Maciej
doaj   +1 more source

Establishing a multi-proxy approach to alpine blockfield evolution in south-central Norway

open access: yesActa Universitatis Carolinae Geographica, 2017
Blockfields in high latitude mountain areas are a wide spread proxy for glaciation history. Their origin is debated since decades, especially in south-central Norway, where glaciation had a major global climate implication.
Philipp Marr, Jörg Löffler
doaj   +1 more source

Unravelling the evolution of the Frébouge polygenetic cone in Val Ferret (Mont Blanc Massif)

open access: yesBoreas, Volume 55, Issue 2, Page 454-475, April 2026.
Proglacial settings in the Alps are typically polygenetic, often characterized by a complex and discontinuous interplay between glacial, fluvial and gravitational processes. These processes yield high volumes of sediments, which usually exceed their transportation capacity.
Catharina Dieleman   +6 more
wiley   +1 more source

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