Divergent

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code // || · Places were plates are coming apart are called **__ Divergent Boundaries __**.
 * ~ //      **__ Divergent Boundaries  __**
 * ~     [[image:pic5.jpg]]      || 

· they are located along the near mid oceani c-ridges *  Some Divergent boundaries are found near the middle of large oceans like the Kilimanjaro and Mount Kenya.  ||
 * = [[image:divergent-boundary-oceanic-still.gif]] ||
 * [[image:Divergent1.gif]]





= ·  What are the plates moving around on??? = = ·  When were divergent boundaries discovered??? = = ·  what are divergent boundaries?? = =<span style="FONT-WEIGHT: normal; COLOR: #fc6488; FONT-FAMILY: Symbol; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol; mso-bidi-font-weight: bold"> ·  <span style="COLOR: #00b0f0; FONT-FAMILY: 'Castellar','serif'">Where do oceanic divergent boundaries get there magma from?? =
 * <span style="FONT-SIZE: 36pt; COLOR: #4fe53b; LINE-HEIGHT: 115%; FONT-FAMILY: 'Castellar','serif'">__?? Questions ??__ **

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 * <span style="FONT-SIZE: 14pt; COLOR: #4fe53b; LINE-HEIGHT: 115%; FONT-FAMILY: 'Castellar','serif'">* ****<span style="FONT-SIZE: 14pt; COLOR: #fc6488; LINE-HEIGHT: 115%; FONT-FAMILY: 'Castellar','serif'">Check out this video on plate tectonics and how they formed….. ****<span style="FONT-SIZE: 14pt; COLOR: #4fe53b; LINE-HEIGHT: 115%; FONT-FAMILY: 'Castellar','serif'">* **<span style="FONT-SIZE: 14pt; COLOR: #fc6488; LINE-HEIGHT: 115%; FONT-FAMILY: 'Castellar','serif'">

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[|www.platetectonics.com] [|Http://Pubs.usgs.gov/gip/dynamic/understanding.html] http://jersey.uoregon.edu/~mstrick/geology/geo_lectures/divergent.html http://www.cotf.edu/ete/modules/msese/earthsysflr/plates3.html http://www.pubs.usgs.gov/publications/text/understanding.htmhttp://stloe.most.go.th/html/lo_index/LOcanada4/403/html/2_en.htm || <span style="COLOR: rgb(255,0,119)"><span style="FONT-SIZE: 18pt; COLOR: rgb(255,51,153); LINE-HEIGHT: 115%; FONT-FAMILY: Symbol">· As the plates separate along the boundary, they block between the fault line as they drop down into the soft plastic interior (the asthenosphere).
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<span style="FONT-SIZE: 18pt; COLOR: #39ff33; LINE-HEIGHT: 115%; FONT-FAMILY: Symbol; BACKGROUND-COLOR: #fafffa">· The sinking of the block forms a central valley called a rift.

<span style="FONT-SIZE: 18pt; COLOR: rgb(255,51,153); LINE-HEIGHT: 115%; FONT-FAMILY: Symbol">· __ Magma __ (liquid rock) seeps upward to fill the cracks. Which makes a new crust form along the boundary.

·   Also earthquakes occur along the faults, and volcanoes form where the magma reaches the surface.

<span style="FONT-SIZE: 18pt; COLOR: rgb(255,51,153); LINE-HEIGHT: 115%; FONT-FAMILY: Symbol">· Divergent boundary crosses the land; the rift valleys which form are typically 30 to 50 kilometers wide.

<span style="FONT-SIZE: 18pt; COLOR: rgb(255,51,153); LINE-HEIGHT: 115%; FONT-FAMILY: Symbol">__ · __ Some examples:  Include the East Africa rift in Kenya and Ethiopia, and the Rio Grande rift in New Mexico

<span style="FONT-SIZE: 18pt; COLOR: rgb(255,51,153); LINE-HEIGHT: 115%; FONT-FAMILY: Symbol">· Where a divergent boundary crosses the ocean floor, the rift valley is much narrower, only a kilometer or less across, and it runs along the top of a mid oceanic ridge. · Oceanic ridges rise a kilometer or so above the ocean floor and form a global network tens of thousands of miles long.

· Some examples:  the Mid-Atlantic ridge and the East Pacific Rise.

· Plate separation is a slow process. For example, divergence along the Mid Atlantic ridge causes the Atlantic Ocean to widen at only about 2 centimeters per year. || <span style="FONT-SIZE: 14pt; COLOR: #00b0f0; LINE-HEIGHT: 115%; FONT-FAMILY: 'Castellar','serif'"> <span style="FONT-SIZE: 14pt; COLOR: #4fe53b; LINE-HEIGHT: 115%; FONT-FAMILY: 'Castellar','serif'"> <span style="FONT-SIZE: 14pt; COLOR: #fc6488; LINE-HEIGHT: 115%; FONT-FAMILY: 'Castellar','serif'"> || <span style="COLOR: rgb(255,0,119)"><span style="FONT-SIZE: 18pt; COLOR: rgb(255,51,153); LINE-HEIGHT: 115%; FONT-FAMILY: Symbol">
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