نتایج جستجو برای: glaciolacustrine environment

تعداد نتایج: 517897  

2008
Carol A. Johnston Barbara L. Bedford Michael Bourdaghs Terry Brown Christin Frieswyk Mirela Tulbure Lynn Vaccaro Joy B. Zedler

Plant taxa identified in 90 U.S. Great Lakes coastal emergent wetlands were evaluated as indicators of physical environment. Canonical correspondence analysis using the 40 most common taxa showed that water depth and tussock height explained the greatest amount of species-environment interaction among ten environmental factors measured as continuous variables (water depth, tussock height, latit...

2006
Prince George Dan Erikson

In the BC central interior, fine-textured glaciolacustrine sediments are an important soil parent material on many productive forest sites, particularly along major river valleys such as the Fraser and Nechako. With easy proximity to major transportation routes and wood processing facilities, many such sites were harvested early in the history of logging in this region, long before the advent o...

2004
Andy Breckenridge Thomas C. Johnson Suzanne Beske-Diehl John S. Mothersill

We analyze both new and previously published paleomagnetic records of secular variation (PSV) from Lake Superior sediment cores and compare these records to correlated rhythmite (varve) thickness records to determine post-glacial sedimentation rates and to reassess the termination of glaciolacustrine varves in the basin. The results suggest that offshore sedimentation rates have exhibited consi...

Journal: :Canadian Journal of Earth Sciences 2023

Dive observations, echogram transects, core sampling, and a seismic profile revealed that the lake bed of north-central Lake Erie is an extensive terrace cut by storm waves currents. The erosional unconformity on which Late Wisconsinan (Port Bruce Mackinaw) glacial units crop out. Beds massive diamictons, glaciolacustrine sediments containing parallel reflections, out alternately from west to e...

Journal: :Geologos 2021

Abstract Although deltas and subaqueous fans are both formed in the same near-shore zones of basins, hydraulic conditions for their formation, development sedimentary records different. The present review discusses results previously published studies fan (Gilbert-type deltas) lacustrine glaciolacustrine environments. depositional mechanisms fans, textural structural features lithofacies associ...

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