Originally posted by dusty1
reply to post by Kailassa
However tectonic plate movement does not affect global sea levels and global changes in sea-level are measured in metres, not kilometres.
eustatic sea level 1. n. [Reservoir Characterization] ID: 10663 Global sea level, which changes in response to changes in the volume of ocean
water and the volume of ocean basins
Link
Causes of Eustatic Sea-Level Change Changes in eustatic sea level arise from either changes in the volume of ocean basins or changes in the
volume of water within those basins. The volume of ocean basins is controlled primarily by the rate of seafloor spreading and secondarily by
sedimentation in ocean basins
Accomodation
If sea floor spreading is not caused by Plate Tectonics, then what causes it?
Are you still claiming a global flood once covered the mountain-tops? Isn't that what we're discussing here?
In the case of a global flood, changes to the configuration of the ocean floor will not affect sea-level, unless they are large enough to push land
that was under-water above the water.
This global flood is believed by bible literalists to have occurred only 4000 years ago. We know the mountains we see today were in existence 4000
years ago, and the bible agrees there were mountains before the flood.
As Mount Everest is nearly 9 kilometres above sea-level, and its height has not changed significantly in the last 4000 years, the ocean flooding the
Earth would have to have been 9 kilometres deeper than it is today. For trenches forming in the sea floor to lower this water level at all, material
from the bottom of the sea floor would have to be removed. However the creation of a chasm through plate movement does not remove material, it only
rearranges it. When the whole surface is deeply inundated with water, rearranging the sea-floor via the opening up of trenches does nothing more to
decrease the global sea level than moving the water-covered rocks around on the floor of an aquarium will change the aquarium water-level.
The situation is quite different in the case of an ocean surrounded by land. Chasms forming in a non-global ocean can change water level. To
understand the difference better, imagine yourself in a bath. You can change the bath level by moving into different positions unless you are fully
immersed. If you are fully immersed, no amount of movement will change the water level. The flood you claim happened fully immersed the earth.
Of course there is another mechanism be which eustatic sea level can be altered, and that's by a change in the volume of water in the ocean. Perhaps
you should try running with an earlier suggestion of mine, which was that Noah and his family got thirsty and drank it all up.
Do you understand the difference between Eustatic Sea Level and Relative Sea Level?
You guys really have trouble comprehending measurement, don't you?
Any measurement of sea-level, whether local, steric or eustatic, (no need for the capitalisations,) is a relative measurement.
The term "eustatic" refers to global changes in the sea level due to water mass added to (or removed from) the oceans (e.g. melting of ice
sheets). The term "steric" refers to global changes in sea level due to thermal expansion and salinity variations.
...
Local mean sea level (LMSL) is defined as the height of the sea with respect to a land benchmark,
en.wikipedia.org...
See what each measurement has in common? Each one is calculated in reference to another measurement. A measurement of eustatic sea-level can only be a
measurement of change in sea-level, and can never be an absolute measurement.
Do you now understand that eustatic sea level is a measurement of relative sea-level?