Thursday, November 24, 2011

Answers the following questions? 15 points?

1. The process of isostatic adjustment is most closely associated with which of the following?





a. sea-floor spreading





b. buoyancy





c. volcanic activity





d. lithospheric plate collision





2.


If you were driving down the highway and saw mountains composed of layered strata, you could be confident that you were looking at











a. batholiths or laccoliths.





b. a shield volcano.





c. extrusive igneous rock.





d. sedimentary rocks.|||1) Isostatic Adjustment is most closely related to B: Buoyancy. "Isostasy is the principle of buoyancy where an object immersed in a liquid is buoyed with a force equal to the weight of the displaced liquid. On a geological scale, isostasy can be observed where the Earth's strong lithosphere exerts stress on the weaker asthenosphere which, over geological time flows laterally such that the load of the lithosphere is accommodated by height adjustments."





2) You would be looking at D: sedimentary layers. Sedimentary layers for well defined strata for the most part, unless it is extremely weathered. The strata are a result of different deposition events that lay the sediment in place and then another deposition event comes about and deposits another layer on top of that.





The sources I cited should clarify things pretty well.


Hope you find this helpful.





It wouldn't be batholith's since they are just large igneous intrusions which do not form well defined bed sets. The same thing goes for extrusive igneous rocks.It also would not be a shield volcano because they are built mainly from lava flows which also exhibit poor bedding.

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