OCEAN/ESS 410 Class 1. Earth Structure and Plate Tectonics William Wilcock Lecture/Lab Learning Goals Know and be able to sketch the basic structure of the Earth (crust, lower/upper mantle, core). Be able to describe the process of planetary differentiation Be able to define plate tectonic theory and the 3 types of plate boundary Understand the linkages between plate tectonics and
mantle convection Be able to identify tectonic features on a global scale map of topography/bathymetry (with or without seismicity) - LAB Plate Tectonics island arc trench fracture zone trench
MOR earthquakes ocean crust melt magma adiabatically rising sediments, igneous mantle material crust & mantle continental crust
earthquakes Mantle Mantle melt Internal Structure of the Earth. The Earth is a differentiated Planet
Differentiation Planetary Differentiation early in Earths history Perhaps the most important process a- planet goes through The Earth as a Heat Engine Heat generated by 1. Radioactivity (U, Th, K isotopes) 2. Solidification of Inner Core Heat Lost from the Earth by
1. Mantle Convection Heat Convection - Heating From Below } Conduction Important } Conduction Important Downwelling Plume
Upwelling Plume It is a very efficient means to transport heat Thermal Boundary Layer Convection Important Convection (or advection)
refers to the transport of heat by motion in a liquid or a gas Thermal Boundary Layer A simplistic model of mantle convection and plate tectonics You will commonly see mantle convection depicted in a simple manner,
similar to this figure. This depiction is reasonable at subduction zones but not very accurate at mid-ocean ridges. (figure from Earth by F. Press and R. Siever, 3rd. edition, 1982) Heat Convection - Internal Heating Thermal Boundary Layer Broad Region of Diffuse Upwelling
Downwelling Plume Convection in the Earths mantle is driven primarily (8090%) by internal heating from the decay of long lived radioactive isotopes of potassium, uranium and thorium and not heat loss from the core (1020%). The pattern of
convection for internal heating is different from bottom heating. Many Aspects Mantle Convection in the Earth are Still Incompletely Understood volcanic island chain trench ocean crust mid-ocean ridge
island arc cont. crust from Kellogg et al., 1999 Global Bathymetry Sandwell and Smith Plate Tectonic Theory The Earths surface is made up of a number of a small
number of rigid plates that move relative to one another. Deformation near the earths surface is concentrated along the boundaries between. Plates boundaries may be sites of Divergence - oceanic spreading centers and rifts Convergence - subduction zones and regions of continental collision Motions that are orthogonal to the plate boundary transform faults. Tectonic Plates
= 168 points. Goal 168 - 150 pts = 18 More students. EWS report from OnPoint will be emailed to each principal. ... credits and the IEP" when they could graduate by meeting criteria for graduation codes associated with employment...
(Brief discussion only, in the free & independent electron approximation) Application to the Propagation of Electromagnetic Radiation in a Metal Consider a time dependent electric field E(t) acting on a metal. Take the case when the wavelength of the field...
Some say that that country was in such a bad state, that if not for the New Deal reforms there might have been a revolution or even a fascist take-over, as was occurring in Europe that led to World War...
• Placed in surgical wounds when necessary to drain fluid from surgical site • Types: ? Jackson Pratt (JP) Small 100 mls ? Hemovac Larger 400 mls ? Constavac/Stryker ? Penrose (does not have its own container; usually drains onto...
Proof Strategy for Coding Theorem Proof Strategy for Converse Theorem Theorem Statement Child Protocols The Issue of Time-Sharing Structure of Optimal Codes The Full Triple Trade-off Conclusion Briefly review Quantum Shannon theory Entanglement-Assisted Quantum Channel Coding (Father Protocol) The Classically-Enhanced...
Soy Eres Es Somos Sois Son Estoy Estás Está Estamos Estáis Están Ser Estar * Los usos del verbo Ser: Origin of a person or thing (el origen) Identification (la identificación) Characteristics (las características) Telling time (la hora) and date...
Ready to download the document? Go ahead and hit continue!