Evidence for Headwall Weathering Zones, Boundary Glacier, Canadian Rocky Mountains
نویسندگان
چکیده
منابع مشابه
Influence of high-order mechanics on simulation of glacier response to climate change: insights from Haig Glacier, Canadian Rocky Mountains
Evolution of glaciers in response to climate change has mostly been simulated using simplified dynamical models. Because these models do not account for the influence of high-order physics, corresponding results may exhibit some biases. For Haig Glacier in the Canadian Rocky Mountains, we test this hypothesis by comparing simulation results obtained from 3-D numerical models that deal with diff...
متن کاملFault dating in the Canadian Rocky Mountains: Evidence for late Cretaceous and early Eocene orogenic pulses
Fault rocks from the classic Rocky Mountain foreland fold-and-thrust belt in southwestern Canada were dated by Ar analysis of clay grain-size fractions. Using X-ray diffraction quantification of the detrital and authigenic component of each fraction, these determinations give ages for individual faults in the area (illite age analysis). The resulting ages cluster around 72 and 52 Ma (here calle...
متن کاملElevated weathering rates in the Rocky Mountains during the Early Eocene Climatic Optimum
M. ELLIOT SMITH1*, ALAN R. CARROLL1 AND ERICH R. MUELLER2 Department of Geology and Geophysics, University of Wisconsin-Madison, 1215 W Dayton St., Madison WI 53706, USA Department of Geography, University of Colorado, Boulder, Colorado 80309, USA *Current address: Department of Geology, Sonoma State University, 1801 E Cotati Ave, Rohnert Park, California 94928, USA †e-mail: michael.smith@sonom...
متن کاملSelective glacial erosion and weathering zones in the coastal mountains of Marie Byrd Land, Antarctica
In the coastal mountains of Marie Byrd Land, Antarctica, there is a juxtaposition of ice moulded landforms at lower altitudes and upstanding summits with weathered surfaces bearing tors. This paper uses geomorphological mapping and exposure dating to test two hypotheses commonly used to explain such a landscape contrast: either the pattern reflects contrasts in glacial erosion related to the ba...
متن کاملHow the Mountain Pine Beetle (Dendroctonus ponderosae) Breached the Canadian Rocky Mountains
The mountain pine beetle (MPB; Dendroctonus ponderosae Hopkins), a major pine forest pest native to western North America, has extended its range north and eastward during an ongoing outbreak. Determining how the MPB has expanded its range to breach putative barriers, whether physical (nonforested prairie and high elevation of the Rocky Mountains) or climatic (extreme continental climate where ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Glaciology
سال: 1987
ISSN: 0022-1430,1727-5652
DOI: 10.3189/s0022143000005359