• dFe and Fe speciation of suspended sediment were studied in West Greenland fjords. levels largely capped at 10 nM, regardless particulate speciation. Fe(II)-rich biotite-like particles dominated fjords with Precambrian shield geology. Fe(III)-rich nanoparticles a fjord tertiary basalt decoupled on the spatial scale Glaciers can be significant locally dominant source iron (Fe), biologically es...

ABSTRACT Within the context of work and achievements James Croll, this paper reviews records direct observations glacial landforms sediments made by Charles Lyell, Archibald Geikie Croll himself, in order to evaluate their contributions sciences geology Quaternary environmental change. The outlines social physical environment Croll's youth contrasts with status experiences Lyell Geikies. It als...

[1] Estimates of 20th Century sea level rise are typically 1.5 to 2 mm/y, with a steric contribution of (0.5 ± 0.2) mm/y. Estimates of the eustatic contribution vary widely between 1.1 and +1.3 mm/y. We attempt an independent estimate of eustatic sea level rise based on the measured freshening of the global ocean, and with attention to the contribution from melting of sea ice (which affects fre...

.......................................................................................................................................2 Overview of Yosemite’s History .................................................................................................2 Yosemite Discovery...................................................................................................................

A detailed understanding of microbial ecology in different supraglacial habitats is important due to the unprecedented speed of glacier retreat. Differences in bacterial diversity and community structure between glacial snow and glacial soil on the Chongce Ice Cap were assessed using 454 pyrosequencing. Based on rarefaction curves, Chao1, ACE, and Shannon indices, we found that bacterial divers...

it is a very short time that the quaternaries period in geology and physical geography's knowledge has occupied a very important place. during this period, the earth has suffered consecutive freezing that has been accompanied by tides and alternate erosion and sedimentation. sedimentary successions have recorded valuable evidence of changes with very accurate details. the study of these sedimen...

We can trace the roots of ground water hydrology in the U.S. to Wisconsin at the end of the nineteenth century when there was a remarkable confluence of talent at the University of Wisconsin (now the University of WisconsinMadison), including T.C. Chamberlin, F.H. King and C.S. Slichter. Although none of these men likely would have identified himself as a hydrologist, each did seminal work in g...

Water (brine) co-produced with oil in the Williston Basin is some of the most saline in the nation. The Prairie Pothole Region (PPR), characterized by glacial sediments and numerous wetlands, covers the northern and eastern portion of the Williston Basin. Sheridan County, Montana, lies within the PPR and has a documented history of brine contamination. Surface water and shallow groundwater in t...

Glacial sediment research using thin sections began post-1945. Microsedimentology examines sediments at the microscopic level deriving insights into processes of glacial erosion, transport, and deposition. Two issues exist (1) difficulty by some in recognizing microstructures section (2) absence quantitative data making reproduction difficult. The latter is hard to resolve but more image captur...