نتایج جستجو برای: glacial sedimentation

تعداد نتایج: 29015  

Journal: :Anais da Academia Brasileira de Ciencias 2007
Michel M Mahiques Marina M Fukumoto Ilson C A Silveira Rubens C L Figueira Marcia C Bícego Rafael A Lourenço Silvia H Mello-E-Sousa

A first evaluation of the sedimentary changes, including accumulation of inorganic and organic carbon on the upper slope off Southeastern Brazil under different climatic conditions, based on the analysis of a sedimentary core, is here presented. Results indicate that sedimentation rate as well sedimentary characteristics, including the nature of the organic carbon deposited during the LGM (Last...

Journal: :پژوهش های جغرافیای طبیعی 0
معصومه رجبی استادیار گروه جغرافیای طبیعی دانشگاه تبریز مریم بیاتی خطیبی استادیار گروه جغرافیای طبیعی دانشگاه تبریز

abstract a mountain glacier, when it occupies a river valley, immediately begins to change the cross-section and profile of that valley. river valleys in mountain areas tends to have v-shaped profiles. glaciers work to widen as well as deepen their valleys and the typical cross-section of a glacial valley is u-shaped. the u-shaped glacial valley is one of the most characteristic of glacial land...

2013
R. M. McKay G. B. Dunbar T. R. Naish P. J. Barrett M. Harper T. Naish L. Carter

A sediment model and retreat history for the Ross Ice (Sheet) Shelf in the Western Ross Sea since the Last Glacial Maximum" (2007). Related Publications from ANDRILL Affiliates. Summary Three sediment gravity cores collected from beneath the McMurdo Ice Shelf and six piston cores from the Erebus Basin (in McMurdo Sound) and the Lewis Basin (north of Ross Island) were analysed in order to constr...

Journal: :Science 2005
Alexander M Piotrowski Steven L Goldstein Sidney R Hemming Richard G Fairbanks

Evidence from high-sedimentation-rate South Atlantic deep-sea cores indicates that global and Southern Ocean carbon budget shifts preceded thermohaline circulation changes during the last ice age initiation and termination and that these were preceded by ice-sheet growth and retreat, respectively. No consistent lead-lag relationships are observed during abrupt millennial warming events during t...

2012
P. T. Harris P. E. O'Brien P. Sedwick E. M. Truswell

HARRIS, P.T., O'BRIEN, P.E., SEDWICK, P. & TRUSWELL, E.M., 1996 (xi): Late Quaternary History of sedimentation on the Mac. Robertson Shelf, East Antarctica: problems with 14C-dating of marine sediment cores. In Banks, M.R. & Brown, M.]. (Eds): CLIMA TIC SUCCESSIONSAND GLACIAL HIS TOR YOF THE SOUTHERN HEMISPHERE OVER IRE LASTHVE MILLION YEARS. Pap. Proc. R. Soc. Tasm. 130(2): 47-53. ISSN 0080-47...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید