Aeromagnetic map of the northwestern part of the Hibbing 1 degree x 2 degree Quadrangle, Minnesota

1988 ◽  
Author(s):  
Robert E. Bracken ◽  
Richard H. Godson
Keyword(s):  
Northwestern Part

SHORT-TERM DYNAMICS OF THE ANAPA BAY-BAR SHORELINE

2017 ◽  
Author(s):  
Marina Krylenko ◽  
Marina Krylenko ◽  
Alexandr Aleynikov ◽  
Alexandr Aleynikov ◽  
Viacheslav Krylenko ◽  
...  
Keyword(s):  
Black Sea ◽  
Satellite Images ◽  
The Black Sea ◽  
Northwestern Part ◽  
Short Term ◽  
Shoreline Position ◽  
Local Dynamics ◽  
Average Displacement ◽  
Local Erosion

The Anapa bay-bar is located in the northwestern part of the Black Sea. With the goal in mind to determine the short-term dynamics of the Anapa bay-bar we analyzed satellite images from 2003 to the present. Depending on the hydro-lithodynamical situation the shoreline configuration during storm can vary from a rectilinear to sinusoidal forms. There are regions of local erosion or accumulation whose formation is related to the alongshore motion of sediments and dynamics of underwater bars. Comparison of the data on 1965 and 1966 showed that in this period the amplitude of the shoreline position was more than 20 m but average displacement of the shoreline for 13 months was only 0.8 m. This study showed that for the analysis of changes in the shoreline position is necessary to consider the configuration of the coastline at the time of each observation and the local dynamics.

The mid-Paleozoic deformation in the Hazen fold belt, Ellesmere Island, Arctic Canada

1990 ◽  
Vol 27 (10) ◽  
pp. 1359-1370 ◽  
Author(s):  
Eva M. Klaper
Keyword(s):  
Large Scale ◽  
Ellesmere Island ◽  
Small Scale ◽  
Northwestern Part ◽  
Fold Belt ◽  
Southeastern Part ◽  
Lower Paleozoic ◽  
Slip Mechanism ◽  
Fold Belts ◽  
Surface Geology

The mid-Paleozoic deformation of lower Paleozoic subgreenschist-facies sediments of the Hazen fold belt in northern Ellesmere Island is represented predominantly by chevron-style folding. Folded multilayers display cleavage fans suggesting synchronous fold and cleavage formation. Bedding-parallel slip indicates a flexural slip mechanism of folding. The geometry of several large-scale anticlinoria has been interpreted as being due to formation of these structures over detachments and thrust ramps.The constant fold geometry, the parallel orientation of faults and large- and small-scale folds, and the axial-plane foliation are related to a single phase of folding with a migrating deformation front in the Hazen fold belt during the mid-Paleozoic orogeny. The minimum amount of shortening in the Hazen and Central Ellesmere fold belts has been estimated from surface geology to increase from 40–50% of the original bed length in the external southeastern part to 50–60% in the more internal northwestern part of the belts.The convergent, thin-skinned nature of the Hazen and Central Ellesmere fold belts indicates that the postulated transpressive plate motions during the accretion of Pearya did not affect the study area.

scholarly journals The Components of the Glacial Runoff of the Tsambagarav Massif from Stable Water Isotope Data

Geosciences ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 297 ◽  
Author(s):  
Dmitry V. Bantcev ◽  
Dmitry A. Ganyushkin ◽  
Kirill V. Chistyakov ◽  
Ilya V. Volkov ◽  
Alexey A. Ekaykin ◽  
...  
Keyword(s):  
Global Climate ◽  
Isotopic Analysis ◽  
Ice Formation ◽  
Northwestern Part ◽  
Glacial Ice ◽  
Main Method ◽  
Total Runoff ◽  
Glacial Runoff ◽  
Isotopic Separation ◽  
Main Components

The aim of this study was to determine the contribution of snow and glacial ice to the river fluxes, and to identify the type of ice formation in the Tsambagarav massif (the northwestern part of Mongolia). The main method for this study was isotopic analysis of water samples. The isotopic separation showed that the shares of the main components in the total runoff differed for different rivers of the massif. Alongside with that, glacial meltwater prevailed in all the investigated fluxes. The share of snow and firn in the meltwater coming from the surface of the large valley glaciers in the middle of the ablation season in 2017 changed by only 10%—from 20% to 30%. Thus, further reduction of glaciation caused by global climate change could significantly affect the water balance of the study area. The isotopic composition of glacial ice proves that its alimentation primarily comes from precipitation during the transitional seasons. Superimposed ice is not the basis for nourishment of the glaciers of the Tsambagarav massif.

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