Spatial and temporal variations in Nd isotopic signatures across the crystalline core of the North Cascades, Washington

2008 ◽  
pp. 499-516 ◽  
Author(s):  
Jennifer E.P. Matzel ◽  
Samuel A. Bowring ◽  
Robert B. Miller
Keyword(s):  
Temporal Variations ◽  
Spatial And Temporal Variations ◽  
North Cascades ◽  
Isotopic Signatures ◽  
The North ◽  
Crystalline Core

scholarly journals Spatial and temporal variations of rainy days and mean daily rainfall intensity in northern Nigeria.

MAUSAM ◽  
2021 ◽  
Vol 44 (1) ◽  
pp. 85-92
Author(s):  
E. O. OLADIPO ◽  
S. SALAHU
Keyword(s):  
Rainfall Intensity ◽  
Daily Rainfall ◽  
Temporal Variations ◽  
Spatial And Temporal Variations ◽  
Northern Nigeria ◽  
Rainfall Trend ◽  
North Central ◽  
The North ◽  
The Mean ◽  
Rainy Days

The spatial and temporal variations of rainy Gays arid daily rainfall intensity for northern Nigeria for using 54 years data are analysed, The extent and nature of non-random changes, such as trend and fluctuations are Investigated. In general, both, the rainy day frequency and mean daily rainfall intensity decreases northwards except for localized orographic effect in the north central Part of the region. There is statistical evidence or decreasing trend in the, number of rainy days over the period of study, but the trend analysis showed no significance or the mean daily rainfall intensity. This suggests that the recent decreasing rainfall trend In the region particularly In the Sahellan zone, In the result of decrease In the frequency of rainy days and not due to any significant change In the rainfall intensity.  

Orogen-parallel extension in the North Cascades Crystalline Core, Washington

Tectonics ◽  
1989 ◽  
Vol 8 (6) ◽  
pp. 1105-1114 ◽  
Author(s):  
E. H. Brown ◽  
J. L. Talbot
Keyword(s):  
North Cascades ◽  
The North ◽  
Crystalline Core ◽  
Parallel Extension

Tectonic implications of syn- and post-emplacement deformation of the Mount Stuart batholith for mid-Cretaceous orogenesis in the North Cascades

1992 ◽  
Vol 29 (3) ◽  
pp. 479-485 ◽  
Author(s):  
Robert B. Miller ◽  
Scott R. Paterson
Keyword(s):  
British Columbia ◽  
High Temperature ◽  
Main Part ◽  
North Cascades ◽  
Geochronological Data ◽  
The Core ◽  
The North ◽  
Crystalline Core ◽  
Thrust System ◽  
Unknown Period

The 93–96 Ma Mount Stuart batholith intruded across the boundary between the Northwest Cascades thrust system and the crystalline core of the North Cascades. Although previously considered posttectonic, the northeast margin of the Mount Stuart batholith and its wall rocks have been involved in syn- to post-emplacement, southwest-directed thrusting and folding, and west-northwest stretching. Contraction ended shortly after emplacement, as indicated by high-temperature recrystallization in thrust-related mylonites of the pluton and by geochronological data, whereas west-northwest stretching continued for an unknown period of time. This is the best documented mid-Cretaceous contractional belt in the main part of the crystalline core. The shortening direction and timing are identical to that of southwest-vergent thrusts in the offset continuation of the core in British Columbia. The contractional belt provides a link between thrusting in the Northwest Cascades thrust system and deformation in the crystalline core.

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