7/23/2019 GLGY 201 Summary Answers
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GLGY 201 Summary & Review
Overview Planet Earth (Ch. 2)
Plate e!t"ni!# (Ch. $% )he"ry "' late te!t"ni!#Ge"l"*i!al
evi+en!e
Glacial deposits (glacial striations), flowing out on land. Form
on land, not oceanbasins, and expand on land.
Fossils found on various continents that are identical.
Coal formation deposits, band of land.
Large trenches, areas of seismic and volcanic activit. !upports
seafloor spreadingtheor.
Ge"hy#i!al evi+en!e" magnetism, gravit, densit of roc#s
$aring inclinations of magnetic minerals (magnetite) in roc#s,
shows howmagnetic field changes. %agnetite will orient itself with
the &arth's magnetic field.ill incline itself.
cean roc#s show regions where there were strong magnetic
anomalies, and thenregions where magnetic roc#s were pointing in
different directions. %irror imagesof ridges. *arallel.
+igher heat flow in ridges that shows evidence of spreading.
$ tye# "' late ,"un+arie# - relative m"ti"n al"n* ,"un+ary
