- published: 06 Feb 2013
- views: 19257
A mid-ocean ridge is an underwater mountain system formed by plate tectonics. It consists of various mountains linked in chains, typically having a valley known as a rift running along its spine. This type of oceanic mountain ridge is characteristic of what is known as an oceanic spreading center, which is responsible for seafloor spreading. The production of new seafloor results from mantle upwelling in response to plate spreading; this isentropic upwelling solid mantle material eventually exceeds the solidus and melts. The buoyant melt rises as magma at a linear weakness in the oceanic crust, and emerges as lava, creating new crust upon cooling. A mid-ocean ridge demarcates the boundary between two tectonic plates, and consequently is termed a divergent plate boundary.
Mid-ocean ridges are geologically active, with new magma constantly emerging onto the ocean floor and into the crust at and near rifts along the ridge axes. The crystallized magma forms new crust of basalt (known as MORB for mid-ocean ridge basalt) and gabbro.
Mid-ocean ridges extend for 70,000km around the globe. They are the Earth's tectonic plate boundaries and creators of its crust. Yet they remain almost completely unexplored. In this short film, Frank Pope, a marine biologist and ocean correspondent for The Times, gives a glimpse of what we do know about these fiery sea monsters. To find out more, and read detailed explanations of the models in the film, click http://www.thetimes.co.uk/tto/science/eureka/article3528237.ece Eureka magazine, The Times
VISIT OUR OFFICIAL YOUTUBE CHANNEL: OCEAN NETWORKS CANADA https://www.youtube.com/user/OceanNetworksCanada Laurence Coogan is Project Leader of a Canada Foundation for Innovation (CFI) 2012 Leading Edge Fund award to expand research at the Endeavour segment of the Juan de Fuca ridge in the northeast Pacific Ocean, approximately 200 km offshore Vancouver Island. Dr. Coogan is an associate professor with the School of Earth and Ocean Sciences at the University of Victoria.
A mid-ocean ridge is an underwater mountain system formed by plate tectonics. It consists of various mountains linked in chains, typically having a valley known as a rift running along its spine. This type of oceanic mountain ridge is characteristic of what is known as an oceanic spreading center, which is responsible for seafloor spreading. The production of new seafloor results from mantle upwelling in response to plate spreading; this isentropic upwelling solid mantle material eventually exceeds the solidus and melts. The buoyant melt rises as magma at a linear weakness in the oceanic crust, and emerges as lava, creating new crust upon cooling. A mid-ocean ridge demarcates the boundary between two tectonic plates, and consequently is termed a divergent plate boundary.
New from IRIS Education & Public Outreach Narrated and updated to correct shape of base of the lithosphere. Replaces previous animation As plates move away from each other, the lithosphere thins. New oceanic lithosphere is created when basalt magma from the mantle is forced up into fractures in the crust. The submarine mid-ocean ridges form the longest mountain ranges in the world. Narrated by Roger Groom, Mt. Tabor Middle School, Portland OR Animation & graphics by Jenda Johnson, Earth Sciences Animated
Woods Hole Oceanographic Institution Senior Scientist and Chair, Susan Humphris, discusses the phenomena of tectonic plates, underwater volcanoes, and hydrothermal systems.
Underwater volcanic eruptions and magma flows on the sea floor have been seen for the first time ever thanks to video captured by NOAA. James Williams talks to the lead scientist on the project to learn the story behind the explosive images.
Ocean Ridge is a small coastal community along US Hwy A1A. It lies 1.6 miles north of Briny Breezes, 1.3 miles east of Boynton Beach and 4.3 miles south of South Palm Beach. To the east lies the Atlantic Ocean. Ocean Ridge has a total area of 2.0 square miles and only 0.9 square miles of it is land. This pristine, exclusive beach community is home to some of the most luxurious estates in Florida. Visit www.RandyandNick.com to learn more about owning a piece of paradise.
Mid Ocean Ridges and Ocean/Continent Convergent boundaries.
Early morning foggy takeoff from KDVO (Novato) IFR to E55 (Ocean Ridge) Difficult Landing....
T34B Birch Lecture—Focusing in on Mid-Ocean Ridge Segmentation Presented by:Suzanne M. Carbotte, Columbia University
Diagrams and descriptions of plate boundaries. Mantles, Mid Ocean Ridge, and Convections Currents
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James Cameron teams up with NASA scientists to explore the Mid-Ocean Ridge, a submerged chain of mountains that band the Earth and are home to some of the planet's most unique life forms.
James Cameron teams up with NASA scientists to explore the Mid-Ocean Ridge, a submerged chain of mountains that band the Earth and are home to some of the planet's most unique life forms.
James Cameron teams up with NASA scientists to explore the Mid-Ocean Ridge, a submerged chain of mountains that band the Earth and are home to some of the planet's most unique life forms.
Language: Hindi, Topics Covered: 1. Recap of the previous lecture: Latitude., Longitude, Solstice, equinox, Timezones, International Dateline, Earth Interior, Rock Cycle, Continental drift theory, Sea-floor spreading theory, Mid-oceanic ridge and trenches 2. Plate tectonic theory: Plates of the earth, property of interior rocks and how they affect interaction among the plates 3. Divergent plate boundary of oceanic plates and continental plates (conti. in next part of video) Powerpoint available at http://Mrunal.org/download Exam-Utility: UPSC CSAT, CDS, CAPF Faculty Name: Ms. Rajtanil Solanki Venue: Sardar Patel Institute of Public Administration (SPIPA), Satellite, Ahmedabad, Gujarat,India
Continental Drift theory -primary - secondary - tertiary - continental crust- oceanic crust-wedgner theory- mid oceanic ridges - Earth movement- fault: normal & reverse