The Salt Range and Potwar Plateau of northern Pakistan are part of
the thin-skinned, active thrust system related to the ongoing collision of
the Asian and Indian continental blocks. Platform rocks and orogenic
molasse of the Indo-Pakistani shield are deformed in south-verging thrusts
and folds, relative to a northward-converging basement....
The High Lava Plains province (HLP) of southeastern Oregon is a Miocene to Recent volcanic upland characterized by widespread basaltic volcanism and west-migrating rhyolitic volcanism. New ⁴⁰Ar/³⁹Ar ages for HLP rhyolites demonstrate that the trend of migrating rhyolitic volcanism is robust, reflecting westward migration at a rate of -35 km/m.y....
Magnetic and gravity modelling was completed along two E-W transects offshore central Oregon. These models indicate that the backstop-forming western edge of the Siletz terrane has a seaward dip of approximately 40° to 49° at 44°48'N, shallowing to ~28° at 44°1 1 'N. This is a well-determined result, given available...
Four cross sections are balanced and retrodeformed to 250±50 ka and
975±75 ka to yield crustal shortening amounts and rates for the western
Transverse Ranges of California. The cross sections compare the shortening
that occurs along a transfer zone in which displacement is transferred eastward
from a surface reverse fault...
The Salt Range is clearly the active participant in the scenario of the progressive southward migration of the Himalayan thrust front. It extends approximately 180 km ENE along strike and is underlain by salt. This is manifested by its very narrow (<1°) cross-sectional taper and great (150 km) width. Integration...
Using gravity, magnetic, bathymetric and seismic
refraction data, I have constructed a geophysical cross-section
of the central part of the northern Gulf of California. The
section exhibits a crustal thickness of 18 km and features an
anomalous block of high density lower basement (3.15 g/cm³)
which probably resulted from rifting...
The continental margin off the coast of Pakistan between the
Murray ridge and the Gulf of Cambay has been studied in this
work using gravity, magnetic and bathymetric data. Two dimensional
gravity and magnetic models based on free-air
gravity and residual magnetic data are developed along a north-south
profile off...
The Queen Charlotte Fault system is a segment of the North America - Pacific
plate boundary. From 45 Ma - 5 Ma, plate motion has been primarily translational.
Since 5 Ma, transpression has been the dominant mode of interaction. The plate
boundary west of the Queen Charlotte Islands is characterized...
Gravity data along an east-west profile from the Punjab plain of Pakistan to the western
border town of Chaman have been incorporated into interpretation of the gross crustal
structure underlying the Sulaiman Range. Interpretation of the free-air, Bouguer, and
isostatic gravity anomalies suggests that 15 to 25 km thick, transitional...
