Zobrazeno 1 - 10
of 92
pro vyhledávání: '"John O. Stone"'
Publikováno v:
Environmental and Engineering Geoscience. 27:395-407
Yosemite National Park, California, is one of the best-documented sites of historical rockfalls and other rock slope failures; however, past work shows that this record does not capture the infrequent largest occurrences, prehistoric events orders of
Autor:
Michelle Koutnik, Trevor R. Hillebrand, Howard Conway, Keir Nichols, Courtney King, John O. Stone, Brenda L. Hall, Brent M. Goehring, Mette K. Gillespie
Publikováno v:
The Cryosphere, Vol 15, Pp 3329-3354 (2021)
The Cryosphere
The Cryosphere
Chronologies of glacier deposits in the Transantarctic Mountains provide important constraints on grounding-line retreat during the last deglaciation in the Ross Sea. However, between Beardmore Glacier and Ross Island – a distance of some 600 km
Publikováno v:
American Journal of Science. 320:637-676
We report geomorphic observations and cosmogenic-nuclide measurements on bedrock surfaces from three isolated nunatak groups in West Antarctica: the Pirrit Hills and Nash Hills, located in the Weddell Sea sector, and the Whitmore Mountains, located o
Publikováno v:
Geology. 48:630-634
During the last glaciation, East Antarctic outlet glaciers contributed to a grounded ice sheet in the Ross Embayment. The timing of maximum ice extent, as well as of subsequent deglaciation of these outlets, has implications for the behavior of the A
Publikováno v:
Earth and Planetary Science Letters. 519:152-164
Defying common expectations, some of the oldest landscapes on Earth are found in the humid tropics. ^(40)Ar/^(39)Ar dating shows that Fe-rich regolith that armors the ∼700–1000 m elevation banded iron-formation plateaus at Urucum, Mato Grosso do
Publikováno v:
Quaternary Geochronology
Quaternary Geochronology, Elsevier, 2019, 52, pp.63-76. ⟨10.1016/j.quageo.2019.02.006⟩
Quaternary Geochronology, Elsevier, 2019, 52, pp.63-76. ⟨10.1016/j.quageo.2019.02.006⟩
International audience; We measured concentrations of Ne isotopes in quartz in a 27.6-meter sandstone core from a low-erosion-rate site at 2183 m elevation at Beacon Heights in the Antarctic Dry Valleys. Surface concentrations of cosmogenic 21 Ne ind
Autor:
Timothy T. Barrows, Julia Marquard, Anthony K. Aufdenkampe, John O. Stone, Beth A. Fisher, Rolf Aalto
Publikováno v:
Marquard, J, Aalto, R E, Barrows, T T, Fisher, B A, Aufdenkampe, A K & Stone, J O 2018, ' Topographic variation in soil erosion and accumulation determined with meteoric 10 Be : Soil erosion and accumulation determined with meteoric 10Be ', Earth Surface Processes and Landforms . https://doi.org/10.1002/esp.4483
Understanding natural soil redistribution processes is essential for measuring the anthropogenic impact on landscapes. Although meteoric beryllium‐10 (10Be) has been used to determine erosion processes within the Pleistocene and Holocene, fewer stu
Autor:
Joel H. Gombiner, John O. Stone
Publikováno v:
Geological Society of America Abstracts with Programs.
Autor:
Trevor R. Hillebrand, John O. Stone, Michelle Koutnik, Courtney King, Howard Conway, Brenda Hall, Keir Nichols, Brent Goehring, Mette K. Gillespie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dce696dc17f00eb079292d39d41ec411
https://doi.org/10.5194/tc-2020-356-supplement
https://doi.org/10.5194/tc-2020-356-supplement
Autor:
Courtney King, John O. Stone, Mette K. Gillespie, Keir Nichols, Michelle Koutnik, Brenda L. Hall, Howard Conway, Trevor R. Hillebrand, Brent M. Goehring
We present exposure ages of glacial deposits at three locations alongside Darwin Glacier and its tributary Hatherton Glacier that record several hundred meters of late Pleistocene to early Holocene thickening relative to present. As the grounding-lin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f4b4bd94363b2ddf96e83190e7d2b92
https://doi.org/10.5194/tc-2020-356
https://doi.org/10.5194/tc-2020-356