Sunday, November 20, 2011

I just can't get my head around it?! What are Batholiths,Laccoliths,Phacolit鈥?and Lopoliths?

I'm trying to understand what these mean for geography. I looked them up but i don't understand it's to complicated. Could anyone simply tell me what they mean? Help would be much appreciated :)|||A batholith (from Greek bathos, depth + lithos, rock) is a large rock that forms from cooled magma deep in the earth's crust.


http://images.search.yahoo.com/images/vi鈥?/a>


http://images.search.yahoo.com/search/im鈥?/a>





A laccolith is an igneous intrusion that has been injected between two layers of sedimentary rock. The pressure of the magma is high enough that the top layer is forced upward, giving the laccolith a dome or mushroom-like form.


Images:


http://en.wikipedia.org/wiki/File:Laccol鈥?/a>


http://images.search.yahoo.com/search/im鈥?/a>


http://user.mc.net/~mena/sciences/misc/l鈥?/a>





Lopolith: A large, bowl-shaped body of igneous rock intruded between layers of sedimentary rock. Lopoliths are usually connected to a dike and are typically tens of kilometers thick and hundreds of kilometers wide. It varies from the laccolith because the bottom layer bulges, not the top.


Image:


http://user.mc.net/~mena/sciences/misc/l鈥?/a>





Phacolith: An elongated dome of intrusive igneous rock usually located beneath the crest of an anticline or the trough of a syncline. In this case, it seems that neither the top or bottom layers are level.


Image: http://www.bing.com/images/search?q=Phac鈥?/a>

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