Everything goes into the sea beds. Can it be possible that the whole of the landmass flows into the oceans leaving no place on the earth above the sea levels.
Hi,
Erosion is the process of degradation and transformation of the relief, and therefore of the rocks, which is caused by any external agent (hence other than tectonics).
A relief whose pattern is mainly due to erosion is called "erosional relief". Erosion factors are:
the climate ;
the relief;
physics (hardness) and chemistry (eg solubility) of rock;
the absence or absence of vegetation cover and the nature of the plants;
tectonic history (fracturing for example);
the action of man (agricultural practices, urbanization).
Erosion acts at different rates and can, over several tens of millions of years, erase mountains, dig valleys, push back cliffs.
Violent natural phenomena such as an avalanche, a jökulhlaup, a lahar or a thunderstorm can change the landscape considerably in a few hours or even minutes.
From the point of view Quantification, there are large amounts of land are transported in low levels of the soceans. There are more mechanisms of erosion:
Mechanical erosion (Erosion by water, Erosion by wind, Erosion due to temperature differences)
Chemical erosion
Erosion caused by living things
Exceptional and brutal phenomena (Transport, etc.)
Hollow forms
Other shapes
Eroson of Littoral.
We note that erosion of agricultural soils is very common and requires a global effort to combat this scourge.
With my best wishes.
Dr. Adel OUESLATI
Dear Vikash
In the Mediterranean, Greece is known to have sunk several islands that were inhabited. Here was erosion and land subsidence happend.
In the east Frisian island langoog grows on one side while eroding on the opposite side. This will sink land masses in a short time. I hoppe I understood your Question!
Regards
Polla
that means in long run we all are going to get into the ocean.
In continuation of Dr.Kenneth's comment .....................
The basic thought is, that instead of being permanent fixtures of the earth's surface, the continents and ocean basins undergo continuous change. Both are parts of lithospheric plates that move against each other, and in the process new crust is created at midoceanic ridges (spreading centers), and old crust is consumed at convergent plate boundaries (subduction zones). ....
Read the topic on 'Evolution of Continents and Oceans'. Highly interesting!!!
http://www.indiana.edu/~g105lab/1425chap13.htm
Best wishes
Highly exaggerated question, though it has happened earlier, happening now and will happen in the future. Dr. Kenneth has already indicated this. We all know the concept of ISOSTACY wherein earth balances out itself. To that extent no need to worry. But, like Dr. Khanaqa has pointed out, due to land subsidence or land upliftment, in many places there is submergence of land surface or retrenchment of sea. This phenomenon can be noticed very clearly in some of the islands.
Dr. Kenneth, it is told "some portions" of the islands in Lakshadweep in the Arabian Sea, off west coast of India, has submerged, but it is not known whether it is due submergence or sea level rise. Observations are still going on. The ground elevation in these islands are between 0.5 and 3.0m above MSL
Narsimha sir,
As far coral islands are concerned they are mainly going inside water due to increasing sea levels. However we have seen during 2004 Tsunami many islands were washed away by the waves so do we need to worry?
There is a big issue of climate change that we are facing today even as we see now that the northern plains of India may face west flowing winds which were almost impossible few years back in winters.That will also increase the suffering of people living in NCR region.weather pattern is changing,corals are being dissolved in acidic waters, so what can be done from our side?
No, it will not be for erosion of land, it may happen due to melting of ice of the poles of the earth and rise of sea water level.
Dear Vikash, there are 10 inhabited islands in lakshadweep, many of these islands were partially submerged during the recent tsunami in 2004, but according my knowledge no island has washed away. Whether one has to worry means, certainly YES, as there are more than 1000 persons / km2 in Lakshdweep islands. Sea water is alkaline in nature, so corals are safe.
Kenneth Sir,
Actually Question has now diverted too much from the original My question targets the all processes, either dissolution and forced displacement resulting in erosion of the landmass and decrease of the continental land.
Even though due to tectonic activities new landmass is created, is it possible that ultimately the land area of the earth will reduce,
or,
will it increase?