Old` Rocks Where They Shouldn`t be
... colleagues circumvent this obviously embarrassing problem? Since the 'dating' ...
... colleagues circumvent this obviously embarrassing problem? Since the 'dating' ...
Explain the relationship between igneous activity, magmatic
... batholiths will be coarse and will undergo fractional crystallisation and so a wide range of rock types may occur. Remember they can form zoned intrusions with basic at the margin acid in the core and intermediate between he two. ...
... batholiths will be coarse and will undergo fractional crystallisation and so a wide range of rock types may occur. Remember they can form zoned intrusions with basic at the margin acid in the core and intermediate between he two. ...
10. Continents: structure and history 10.1. Structure of continents
... obvious example of continental growth by accretion is when two continental landmasses merge during continental collision (e.g. collision between India and Eurasia forming the Himalayan mountain chain). Less obvious but nonetheless of fundamental importance is the accretion of blocks moving along a t ...
... obvious example of continental growth by accretion is when two continental landmasses merge during continental collision (e.g. collision between India and Eurasia forming the Himalayan mountain chain). Less obvious but nonetheless of fundamental importance is the accretion of blocks moving along a t ...
i13 Drift versus land bridges Mesosaurus > - e
... of pumice and vegetation) mechanisms, diasporas would be one way and not back and forth. Some life cannot reasonably island hop. Earthworms studied by Michaelson have a distribution of descendants evolved from primitive forms in other continents (Figure i13.1). For du Toit, this and many other such ...
... of pumice and vegetation) mechanisms, diasporas would be one way and not back and forth. Some life cannot reasonably island hop. Earthworms studied by Michaelson have a distribution of descendants evolved from primitive forms in other continents (Figure i13.1). For du Toit, this and many other such ...
1 Evolution of continental crust through two Wilson
... the rift where it cannot be restored by conventional methods. Along-strike variations in rift expression between lower-plate and upper-plate configurations of basement faults are partitioned by transform faults, some of which offset the trace of the rift. Facies and thickness of synrift and passive- ...
... the rift where it cannot be restored by conventional methods. Along-strike variations in rift expression between lower-plate and upper-plate configurations of basement faults are partitioned by transform faults, some of which offset the trace of the rift. Facies and thickness of synrift and passive- ...
QUIZ
... Make 5 sketches of plate boundaries. Sketch a divergent boundary, three types of convergent boundaries, and a transform boundary. For convergent and divergent, sketch a “side view” and include arrows that show plate motion. Also label the type of crust involved. For the transform, a simple sketch in ...
... Make 5 sketches of plate boundaries. Sketch a divergent boundary, three types of convergent boundaries, and a transform boundary. For convergent and divergent, sketch a “side view” and include arrows that show plate motion. Also label the type of crust involved. For the transform, a simple sketch in ...
The Troodos Ophiolite was probably formed at a RTT/RTF triple
... Troodos crust formed at a spreading centre close to a ridgetrench-trench or ridge-trench-transform triple junction, where subduction-modified, volatile-rich, highly depleted mantle was able to upwell and melt at shallow depths. Troodos crust was thus formed by both fluxing and stretching. At such tr ...
... Troodos crust formed at a spreading centre close to a ridgetrench-trench or ridge-trench-transform triple junction, where subduction-modified, volatile-rich, highly depleted mantle was able to upwell and melt at shallow depths. Troodos crust was thus formed by both fluxing and stretching. At such tr ...
SEDIMENTARY BASINS - AN INTRODUCTION Definition of a
... Intracratonic basins form within stable continental interiors, such as in the Michigan/Illinois basins in the Middle West, the Moscow basin on the Russian platform and the Congo basin in Africa. They are typically relatively shallow, circular in shape and have long histories of relatively slow subs ...
... Intracratonic basins form within stable continental interiors, such as in the Michigan/Illinois basins in the Middle West, the Moscow basin on the Russian platform and the Congo basin in Africa. They are typically relatively shallow, circular in shape and have long histories of relatively slow subs ...
Hydrocarbon Prospectivity of the Western Mediterranean Basin, The
... The Western part of the Mediterranean Region is one of the most attractive areas for hydrocarbon exploration in new frontiers of the entire basin. This sector is characterised by three main domains: the Valencia Trough, the Balearic Basin and the Provencal Basin. The Provencal Basin is the result of ...
... The Western part of the Mediterranean Region is one of the most attractive areas for hydrocarbon exploration in new frontiers of the entire basin. This sector is characterised by three main domains: the Valencia Trough, the Balearic Basin and the Provencal Basin. The Provencal Basin is the result of ...
(Neoproterozoic-Paleozoic) and plate reconstructions
... Khain et al., 1997; Vernikovsky and Vernikovskaya, 2001; Pease et al., 2001). In this model a significant role is played by ophiolites and island arcs, whose zircons U–Pb age has been established in the interval of 755–730 Ma from plagiogranites, gabbros and volcanogenic rocks (Vernikovsky et al., 1 ...
... Khain et al., 1997; Vernikovsky and Vernikovskaya, 2001; Pease et al., 2001). In this model a significant role is played by ophiolites and island arcs, whose zircons U–Pb age has been established in the interval of 755–730 Ma from plagiogranites, gabbros and volcanogenic rocks (Vernikovsky et al., 1 ...
What aspects of the downgoing plate might be important in
... • Deformation of graben fill • Plate Boundary Fault dives beneath graben fill, and tends to emerge near trench axis • Overall ~ 50 m of displacement Casey Moore talk ...
... • Deformation of graben fill • Plate Boundary Fault dives beneath graben fill, and tends to emerge near trench axis • Overall ~ 50 m of displacement Casey Moore talk ...
A case for drilling the Dufek layered mafic intrusion, Antarctica
... element abundance patterns nearly identical to those of Bushveld parental magmas and West Pacific boninites. These characteristics are best explained by having a magma source of once-melted harzburgitic mantle subsequently enriched in large ion lithophile elements by subduction processes. While it i ...
... element abundance patterns nearly identical to those of Bushveld parental magmas and West Pacific boninites. These characteristics are best explained by having a magma source of once-melted harzburgitic mantle subsequently enriched in large ion lithophile elements by subduction processes. While it i ...
The Origin of Ocean Basins
... submarine mountain range. -covers ~1/3 of the ocean floor & extends ~ 60,000 km around Earth. -Features include: *Rift valley: opposite ...
... submarine mountain range. -covers ~1/3 of the ocean floor & extends ~ 60,000 km around Earth. -Features include: *Rift valley: opposite ...
Palaeoclimate: Extreme iceberg generation exposed
... between ocean circulation and ice sheets. In their simulations, variable circulation in an ocean analogous to the glacial North Atlantic Ocean leads to oscillations in ice discharge from the adjacent ice sheet. The connection between the ocean and the ice sheet lies in the coastal ice-shelves into w ...
... between ocean circulation and ice sheets. In their simulations, variable circulation in an ocean analogous to the glacial North Atlantic Ocean leads to oscillations in ice discharge from the adjacent ice sheet. The connection between the ocean and the ice sheet lies in the coastal ice-shelves into w ...
Geology :: 7. Plate interiors
... metamorphic rocks. Between the cratons, there are metamorphosed greenstone belts, which are interpreted as old collision zones. The metamorphic rock masses were intruded by granite plutons. Parts of the cratons are covered by old sedimentary sequences, which – despite their old age – remained unmeta ...
... metamorphic rocks. Between the cratons, there are metamorphosed greenstone belts, which are interpreted as old collision zones. The metamorphic rock masses were intruded by granite plutons. Parts of the cratons are covered by old sedimentary sequences, which – despite their old age – remained unmeta ...
THE BLACK SEA BASIN CRETACEOUS VOLCANIC BELTS: NEW
... In Albian, a volcanic arc was being formed. In the Transcaucasia, Albian volcanites are known in the area of the Adjaro-Trialeti Zone [7, 9, 10]. In the southwest of the Crimea, in Balaklava, Albian tuffs with volcanic bombs and lapilli are known [10, 11]. Albian volcanites are perhaps also present ...
... In Albian, a volcanic arc was being formed. In the Transcaucasia, Albian volcanites are known in the area of the Adjaro-Trialeti Zone [7, 9, 10]. In the southwest of the Crimea, in Balaklava, Albian tuffs with volcanic bombs and lapilli are known [10, 11]. Albian volcanites are perhaps also present ...
Seismic anisotropy measured at the scale of a continent: Australia
... surface wave tomographic studies, the average time span of recording did not exceed 6 months, which is rather limited for shear wave splitting analyses. The data set however provides a full continental scale survey, data being recorded at 190 sites spread out all over the continent. The complexity o ...
... surface wave tomographic studies, the average time span of recording did not exceed 6 months, which is rather limited for shear wave splitting analyses. The data set however provides a full continental scale survey, data being recorded at 190 sites spread out all over the continent. The complexity o ...
Atlantic Conjugate Margins
... Global Plate Modelling: Objectives and Motivation • The construction of regional and global plate tectonic models is critical to understanding a wide range of geological processes such as basin dynamics, margin evolution and palaeo-environment development. • Plate models allow visualisation of regi ...
... Global Plate Modelling: Objectives and Motivation • The construction of regional and global plate tectonic models is critical to understanding a wide range of geological processes such as basin dynamics, margin evolution and palaeo-environment development. • Plate models allow visualisation of regi ...
Ocean Model Pre
... these abyssal plains show that sediments from turbidity currents formed them. After carving canyons in the continental slope, the turbidity currents spread out when they reached the sea floor. Sediments carried by the currents gently filled every seabed crevice with sand, mud and silt washed down fr ...
... these abyssal plains show that sediments from turbidity currents formed them. After carving canyons in the continental slope, the turbidity currents spread out when they reached the sea floor. Sediments carried by the currents gently filled every seabed crevice with sand, mud and silt washed down fr ...
The Laramide Orogeny - University of Nevada, Reno
... dextral transpressional collision between a northward migrating ribbon continent and autochthonous North America (Johnston, 2001). Northern pinning and buckling of this ribbon continent is proposed to have led to the formation of the Alaskan oroclines during collision with North America in Laramide ...
... dextral transpressional collision between a northward migrating ribbon continent and autochthonous North America (Johnston, 2001). Northern pinning and buckling of this ribbon continent is proposed to have led to the formation of the Alaskan oroclines during collision with North America in Laramide ...
The Laramide Orogeny: What Were the Driving Forces?
... dextral transpressional collision between a northward migrating ribbon continent and autochthonous North America (Johnston, 2001). Northern pinning and buckling of this ribbon continent is proposed to have led to the formation of the Alaskan oroclines during collision with North America in Laramide ...
... dextral transpressional collision between a northward migrating ribbon continent and autochthonous North America (Johnston, 2001). Northern pinning and buckling of this ribbon continent is proposed to have led to the formation of the Alaskan oroclines during collision with North America in Laramide ...
CHAPTER 2
... experienced faulting for only half the time that the fault was active, whereas the others would have been offset for the entire span of fault activity. Therefore, the younger body would record less separation along the fault trace ...
... experienced faulting for only half the time that the fault was active, whereas the others would have been offset for the entire span of fault activity. Therefore, the younger body would record less separation along the fault trace ...
Impact of early salt tectonic processes on Post
... strata on the UK continental shelf, whereas the potential of Triassic reservoirs as secondary gas producer or as reservoir for carbon sequestration and storage in support of nearby gas-producing fields is not well understood. Early post-Permian salt tectonic processes during regional extension and t ...
... strata on the UK continental shelf, whereas the potential of Triassic reservoirs as secondary gas producer or as reservoir for carbon sequestration and storage in support of nearby gas-producing fields is not well understood. Early post-Permian salt tectonic processes during regional extension and t ...
Presentation #16 - the Middle East Seismological Forum
... The offshore continuation in Iranian waters lines up with a dog-leg system of a north-south oriented lineament, interpreted as a thrust front, and a conjugated set of northwest-southeast and northwest-southeast oriented normal faults. The main structuring event pre-dates the Tertiary unconformity, a ...
... The offshore continuation in Iranian waters lines up with a dog-leg system of a north-south oriented lineament, interpreted as a thrust front, and a conjugated set of northwest-southeast and northwest-southeast oriented normal faults. The main structuring event pre-dates the Tertiary unconformity, a ...
Lecture 1.
... typical rift system consists of three rift arms at approximately 120 degree angles. These areas are named triple junctions and can be found in several places across the world today. The separated margins of the continents evolve to form passive margins. Hess' theory was that new seafloor is formed w ...
... typical rift system consists of three rift arms at approximately 120 degree angles. These areas are named triple junctions and can be found in several places across the world today. The separated margins of the continents evolve to form passive margins. Hess' theory was that new seafloor is formed w ...