The Sierra Nevada mountain range consists of a vast array of different geologic features. One of these features is in the form of what are known as roof pendants. Roof pendants span through the central and southern portions of the eastern Sierra Nevada. Representing the geologic history of the Sierra Nevada mountain range in California, metamorphic roof pendants offer a glimpse into the past. T...

A continuum approach model was used to determine the permeability of the fractured granite Idaho Batholith underlying the Dry Creek Experimental Watershed east of Boise, Idaho and characterization of the fracture network was completed. A technique for applying the apertures of fractures measured in a less weathered area to the fracture network in the (DCEW) is described. A Monte Carlo simulatio...

The Takomkane pro ject is a multiyear bed rock map ping pro gram ini ti ated by the Brit ish Co lum bia Geo log i cal Sur vey dur ing the 2005 field sea son. This pro gram is fo cused on Me so zoic arc vol ca nic and plutonic rocks of the Quesnel Terrane in the vi cin ity of the Takomkane batholith, which strad dles the Bonaparte Lake (NTS 092P) and Quesnel Lake (NTS 093A) map sheets (Fig 1). P...

We have studied the syn-kinematic very low-grade metamorphism in a polyphase Variscan deformed region using X-ray diffraction techniques. Two phases of regional metamorphism are related to their respective episodes of penetrative deformation in the southern Central Iberian Zone. The data obtained suggest that the rocks did not reach metamorphic equilibrium, but strain favoured the progress of m...

Mafic enclaves from three plutons in the Chilliwack batholith have been compared with contemporaneous mafic stocks in order to determine (1) the processes by which mafic and felsic magmas hybridize in the plutonic environment and (2) whether analysis of early-formed enclave minerals, particularly apatite, can provide a means of seeing through hybridization effects and deciphering the original t...

van Haaften and White (1998) presented kinematic data from shear zones within the Talga Talga Anticline of the Marble Bar belt to invoke a regional thrust-accretion tectonic origin for the East Pilbara Craton. By examination of small-scale, local faults, they inferred five phases of regional deformation, of which an early ESEdirected thrusting event which reactivated ca. 3450 Ma normal faults, ...