The theory of isostasy defines the different elevation on the surface of the earth which was proposed by Clarance Dutton an american geoglist in 1882.
The theory of isostasy gives the two main view :
1. Pratt view
2. Airey view
THEORY OF ISOSTASY
The term Isostasy was coined by the American geologist “Clarence Dutton” in
1882.
The theory of Isostasy explains how different topographic heights can exist on
the earth’s surface. It states that the Earth’s crust floats on the top of the
denser mantle. The crust’s elevation depends on its thickness and density.
Higher regions like mountains have thicker crust and extended deeper into the
mantle. While on the other hand, Lower regions like Oceans basins have a
thinner crust. This ensure the continent and oceans are at a state of
equilibrium, [akin to buoyancy].
The theory of Isostasy can be compared to a boat floating in water with less
mass and more density.
There are two views in Isostasy.
Pratt’s Isostasy:
1. British geologist “John Henry Pratt’s” took an alternative method to
explain isostatic equilibrium.
2. Pratt’s hypothesis is based on the density of the lithospheric blocks
rather than their thickness.
3. Similarly in the Pratt Isostasy less dense portions of the earth’s crust
[such as those made of less dense rock types or those underlain by
substantial sedimentary deposits] ‘float’ higher on the denser mantle.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller tosiefalishah. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.