Engr 597 Tectonics
Formation of the Rocky Mountains
• How did they form?
• Sevier orogeny
• Laramide orogeny
• prevailing theory (flat slab subduction)
1. Very low angle subducting slab
2. rubbing against underside of North American plate
3. first proposed by william dickinson (1978)
4. another good paper Peter Bird (1988)
• Alternative theories
1. Craig jones - suction model
2. (maxson, Tikoff 1996) - Hit and run collision model
"I 'll come back to it"
Within the North American cordillera there lies an expansive region of mountain ranges, basins, and plateaus, stretching from Mexico through America and Canada all the way to Alaska. This region rises up from the ground like…
the Cocos plate subducting under the Caribbean plate. The quake had originated from 25 miles below the surface and 38 miles from Liberia and 87 miles of the capital, resulting in the less damaging effects of the quake. Haiti’s magnitude 7 quake, occurring due to a grinding between the North American and Caribbean plates lasting 250 years, resulted in an realease of this stress. Originating only 5 miles below the surface and the little distance it had been away from the capital had resulted in…
It makes up 40% of the Earth’s surface and has a density of 2.6 grams per centimetre cubed. It has a thickness of 35-70 kilometres.
Oceanic crust consists of dark coloured rocks made up of basalt known as mafic. Mafic is an igneous rock made of mainly magnesium and iron. Oceanic rock is also 7-10 kilometres thick. It has a density of 3 grams per centimetre cubed.
9. Define the terms subduction, mid-ocean ridge, and ocean trench and island arc.
Subduction is when two tectonic plate’s…
Which mountain building event does this correspond to on your sea level curve?
Compression was a driving force as evidenced by the curvature in the cross-section of sediment. Such force could occur at convergent boundary, which could be where two continental crusts collide or the subduction of oceanic crust below continental crust. When two continental crusts collide compression forces crust to displace both up and down. In a subduction zone when an oceanic plate falls below a continental plate…
hills, valleys, mountains and lakes, hot springs and geothermal energy are also due to the volcano’s eruption and the reminisce that was left behind.
The Taupo Volcanic Region sits a top a subduction zone cause by the convergent tectonic plate movement of the Pacific Plate underneath the Australian Plate. Subduction zone’s are marked by their oceanic trenches and specific to Taupo the oceanic trench is Kermadec Trench, one of the world’s deepest trenches. This occurs because…
Earthquake Case History:
2010 Mw = 8.8 Mega-thrust Earthquake, Maule, Chile
By Travis Eddy
In early 2010 central south Chile experienced a Mw = 8.8 earthquake and large tsunami waves that devastated areas on the Chilean Pacific coast, nearby offshore islands, and areas near the epicenter. In addition to the tsunami, the earthquake had many other geological consequences including aftershocks, terrestrial and submarine land-sliding, elevation changes, and a gravity…
Dear US Geological Survey, I think that you should accept Alfred Wegener’s Theory of Continental Drift. There is a large amount of realistic evidence to prove that this theory did occur. Wegener’s theory is that all seven continents were once joined into a supercontinent called Pangaea. He believes that after continents were in that supercontinent, they gradually moved apart over more than a hundred years ago and will continue to move in the future. This Theory of Continental Drift is supported…
This paper examples the formation of the Deccan traps, the Deccan continental flood basalt, and present day Indian. Its first provides a brief background on what the Deccan Traps are and the history of their geologic integrity. The proof is explained through scientists seismic tomographic models and the evolution of the Indian plate, the Reunion island hotspot, and the evolution of lithospheric mantle structure.
Keywords: deccan, mantle, plate, hotspot, reunion, reconstructions.…
The science of magneto hydrodynamics (MHD) deals with geophysical, astrophysical and engineering problems since many years. This subject has attracted attention of many researchers in the MHD flow on Newtonian fluids on plate, cones and disks. Hari R  investigated the chemical and radiation effects on MHD casson fluid flow past an oscillating vertical plate embedded in porous medium. Subbaiah Naidu  studied the effect of Hall current on free convective flow of stratified…
1.1 INTRODUCTION AND DEFINITION
Geothermal energy is the utilization of heat present in the deep earth for the purpose of power generation or other direct use application. In general terms, geothermal energy consists of the thermal energy present in the Earth’s crust. Thermal energy in the earth is distributed between the constituent host rock and the natural fluid that is contained in its fractures and pores at temperatures above ambient levels. Globally, the most commonly…