Comparison of thrust fault rock models to basement-cored folds in the Rocky Mountain foreland

1988 ◽  
pp. 65-74 ◽  
Author(s):  
Judith Savaso Chester ◽  
John H. Spang ◽  
John M. Logan
Keyword(s):  
Rocky Mountain ◽  
Thrust Fault ◽  
Fault Rock

The geometry of folded and thrusted rocks in the Rocky Mountain Foothills near Grande Cache, Alberta

1985 ◽  
Vol 22 (11) ◽  
pp. 1711-1719 ◽  
Author(s):  
Willem Langenberg
Keyword(s):  
Rocky Mountains ◽  
Lower Cretaceous ◽  
Rocky Mountain ◽  
Thrust Fault ◽  
Southeastern Part ◽  
Apical Angle ◽  
Clastic Rocks ◽  
Stratigraphic Section ◽  
Fault Displacement

Lower Cretaceous clastic rocks make up the Inner Foothills of the Rocky Mountains along the Smoky River near Grande Cache, Alberta. Shortening of these rocks is accomplished by folding and thrusting and averages 33% over the area studied.Folds in the area are of the chevron variety. They are caused by shortening of a multilayered sequence of alternating competent and incompetent strata, where the thickness of the competent layers is fairly constant. The folds are generally cylindrical and maintain their shapes over distances of up to 2 km along trend. However, at their tapering ends they are conical.The majority of the faults are southwest-dipping thrusts, displaying ramps that cut up stratigraphic section and flats that are parallel to bedding. The best exposed fault in the area is the Mason Thrust. Displacements along this fault increase from 150 m in the northwest to 1500 m in the southeastern part of the area. A prominent anticline below the Mason Thrust diminishes gradually towards the southeast. A conical fold with a half apical angle of 7° describes this geometry. Shortening by this fold decreases from about 30% in the northwest to 10% in the southeastern part of the area. This indicates that a decrease in shortening by folding is compensated by an increase in thrust fault displacement. It is an example of fault-to-fold displacement transfer.

Mitbringsel aus den Ferien

Praxis ◽  
2005 ◽  
Vol 94 (47) ◽  
pp. 1869-1870
Author(s):  
Balestra ◽  
Nüesch
Keyword(s):  
Rocky Mountains ◽  
Spotted Fever ◽  
Rocky Mountain ◽  
Rickettsia Conorii ◽  
Rocky Mountain Spotted Fever ◽  
Klinische Diagnose ◽  
Rickettsia Rickettsii

Eine 37-jährige Patientin stellt sich nach der Rückkehr von einer Rundreise durch Nordamerika mit einem Status febrilis seit zehn Tagen und einem makulösem extremitätenbetontem Exanthem seit einem Tag vor. Bei suggestiver Klinik und Besuch der Rocky Mountains wird ein Rocky Mountain spotted fever diagnostiziert. Die Serologie für Rickettsia conorii, die mit Rickettsia rickettsii kreuzreagiert, war positiv und bestätigte die klinische Diagnose. Allerdings konnte der beweisende vierfache Titeranstieg, möglicherweise wegen spät abgenommener ersten Serologie, nicht nachgewiesen werden. Nach zweiwöchiger antibiotischer Therapie mit Doxycycline waren Status febrilis und Exanthem regredient.

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