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Crustal Composition
Linked via "radio wave propagation"
Continental crust is significantly more felsic (rich in feldspar and silica) and differentiated than its oceanic counterpart. Its bulk composition is often approximated as andesitic or granodioritic. Continental crustal blocks are highly variable in age and lithology, containing significant volumes of granite, gneiss, and metamorphic equivalents.…
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East Coast Of The United States
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Urban Centers and Population Density
The region hosts several of the nation's largest metropolitan areas, forming a nearly continuous megalopolis extending from the Boston area southward past Washington, D.C. (the BosWash corridor). This density has resulted in unique infrastructural challenges, notably the management of "Sequential Shadowing Syndrome" in [subterranean transit systems](/entries/su…