Results 31 to 40 of about 2,982 (205)

An assessment of surge-induced crevassing and the formation of crevasse squeeze ridges [PDF]

open access: yesJournal of Geophysical Research, 2011
[1] Evidence for extensive crevassing is preserved on the deglaciated forelands of many surging glaciers as crevasse squeeze ridges (CSRs). At some point these crevasses make direct connection with the bed in order to become sediment filled, and full-depth connections have been inferred from turbid water up-wellings in crevasses and the formation of ...
Brice R. Rea, David J. A. Evans
openaire   +1 more source

Crevasse effects on glacier surface temperature from thermal imagery

open access: yesJournal of Glaciology
Thermal imagery was collected for 26 hours over a crevassed region within the accumulation zone of the Haupapa/Tasman Glacier, New Zealand. During the night, the imaged snow surfaces associated with crevasses cooled slower than non-crevassed surfaces ...
Tim Kerr   +6 more
doaj   +1 more source

Characteristics of Gravity Flow Deposits in the Benin Basin (Benin) and Implications for Oil and Gas Exploration

open access: yesGeological Journal, EarlyView.
This study reveals that the underexplored Benin Basin features a narrow shelf and steep slope, which promoted the development of multi‐phase, stacked channel‐lobe complexes. These gravity flow deposits, further enhanced by bottom current reworking, reveal a significant undiscovered Upper Cretaceous stratigraphic play with considerable petroleum ...
Liu Zuodong   +4 more
wiley   +1 more source

Dental enamel hypoplasia and intra‐tooth isotope records as indicators of physiological stress and environmental variability in Early Pleistocene hippopotamids from Melka Kunture (Upper Awash, Ethiopia)

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT Enamel hypoplasia results from temporary disruptions of enamel deposition during tooth development. It is widely used as an indicator of physiological stress in archeological and paleontological contexts; yet, its relationship with environmental conditions during tooth formation remains poorly constrained.
Giuseppe Briatico   +3 more
wiley   +1 more source

Electromagnetic Sounding of Bottom Crevasses on the Ross Ice Shelf, Antarctica

open access: yes, 1979
During the 1976—77 season of the Ross Ice Shelf Geophysical and Glaciological Survey, a series of vertical electromagnetic sounding profiles of subsurface features was completed at station J-9.
John W. Clough   +2 more
core   +2 more sources

Interplanetary frontiers: terraforming from an invasion science perspective

open access: yesOikos, EarlyView.
The pursuit of a multi‐planetary existence represents one of humanity's greatest frontiers. If applied justly, it offers an opportunity to extend its civilization's lifespan amid escalating sustainability crises on Earth. One approach increasingly gaining traction is terraforming, a hitherto theoretical ecological and evolutionary experiment revolving ...
Teun Everts   +2 more
wiley   +1 more source

Field Studies of Bottom Crevasses in the Ross Ice Shelf, Antarctica

open access: yes, 1983
Surface and airborne radar sounding data were used to identify and map fields of bottom crevasses on the Ross Ice Shelf. Two major concentrations of crevasses were found, one along the grid-eastern grounding line and another, made up of eight smaller ...
Kenneth C. Jezek, Charles R. Bentley
core   +2 more sources

Aoraki Mount Cook: Environmental Change on an Iconic Mountaineering Route

open access: yesMountain Research and Development, 2018
Aoraki Mount Cook is New Zealand's highest mountain and a popular destination for climbers. This study combined historical accounts, photos, and geophysical surveys with modern-day spatial analysis, popular narratives, and interviews to explore how ...
Heather Purdie, Tim Kerr
doaj   +1 more source

Evolution, Routing and Reservoir Characteristics of Submarine Channels in a Structurally Deforming Slope Setting: Deep‐Water Joint Development Zone of Nigeria and São Tomé and Príncipe

open access: yesJournal of Petroleum Geology, EarlyView.
ABSTRACT Deep‐water slope channels and associated facies are a major part of clastic sediment dispersal system extending from the shelf‐edge to the abyssal plain. The toe‐thrust area of the deep‐water Niger Delta enables the analysis of these channels and their interaction with evolving fault‐controlled sea‐floor topography to be determined ...
Stanley Ang, Mike Mayall, Lidia Lonergan
wiley   +1 more source

Processes of crevasse formation and the dynamics of calving glaciers : a study at Breiđamerkurjökull [PDF]

open access: yes, 2009
A new model proposed by Benn et al. (2006, 2007) explains the dynamics of calving glaciers based on a new sliding law and a calving criterion modified from a crevasse depth model. In this thesis three key elements of this model are tested: 1) the role
Mottram, Ruth
core   +2 more sources

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