As a result of this density stratification, oceanic crust generally lies below sea level ( for example most of the Pacific Plate ), while continental crust buoyantly projects above sea level ( see the page isostasy for explanation of this principle ).
42.
When the term " relative " is used in context with " sea level change ", the implication is that both eustasy and isostasy are at work, or that the author does not know which cause to invoke.
43.
It turns out that there are different things keeping mountains up : some are effectively floating, some are totally unstable and start to sink as soon as nothing is building them up again . . . the article at isostasy has some more information.
44.
An alternate term that is sometimes used is "'glacial isostasy "', because the uplift near the centre of rebound is due to the tendency towards the restoration of isostatic equilibrium ( as in the case of isostasy of mountains ).
45.
An alternate term that is sometimes used is "'glacial isostasy "', because the uplift near the centre of rebound is due to the tendency towards the restoration of isostatic equilibrium ( as in the case of isostasy of mountains ).
46.
For various geologic reasons, modelled differently by different geologists, the zone of compression in the Aegean became one of extension : the region widened and dome-like or ovoid massifs were uncovered, or exhumed, from the subduction zones and rose by isostasy.
47.
In " To A Rocky Moon ", lunar geologist isostatic uplift, " because " the thin crust and greater heat inside basins lower the viscosity of the craters'substrate, allowing it to reach isostasy with its surroundings more quickly than can other craters ."
48.
In 1889, Dutton proposed the term " isostasy " for the concept of a general balance within the Earth's crust, with lighter weight blocks coming to stand higher than adjacent blocks with higher density, an idea first expressed by Pratt and Airy in the 1850s.
49.
The idea of continents with a permanent location, the geosyncline theory, the Pratt-Hayford isostasy, the extrapolation of the age of the Earth by Lord Kelvin as a black body cooling down, the contracting Earth, the Earth as a solid and crystalline body, is one school of thought.
50.
Wegener's continental drift hypotheses is a logical consequence of : the theory of thrusting ( alpine geology ), the isostasy, the continents forms resulting from the supercontinent Gondwana break up, the past and present-day life forms on both sides of the Gondwana continent margins, and the Permo-Carboniferous moraine deposits in South Gondwana.
