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Mississippi delta could have formed in 5000 years (Talk.Origins)

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Response Article
This article (Mississippi delta could have formed in 5000 years (Talk.Origins)) is a response to a rebuttal of a creationist claim published by Talk.Origins Archive under the title Index to Creationist Claims.

Claim CD211:

The size of the Mississippi River delta divided by the sediment accumulation rate gives an age of less than 30,000 years, indicating a young earth.

Source: Pathlights, n.d. The age of the earth - 2.

CreationWiki response: The wording of this claim is contrary to that of the cited source. The source actually calculates the age of the Mississippi River delta at 4,620 years not 30,000 years. (Talk.Origins quotes in blue)

1. The age of the Mississippi delta only gives a lower limit for the age of the earth.

This is true, but calculating the actual age of the Mississippi delta requires estimates of past disposition rates, and such estimates will probably be different in Flood geology and Uniformitarian geology.

2. The Mississippi delta is seven miles thick at the Gulf of Mexico. This is too thick to have formed suddenly by a single flood, as such a flood would have spread the sediments out, not compacted them all in one place.

It is not the delta that is seven miles thick, but rather the sedimentary rock upon which it sits. Furthermore these layers extend several hundred miles into the Gulf of Mexico, as such the sediment is spread out as would be expected from a single flood.

3. The claimed size of the Mississippi delta considers only its current delta. The location of the delta has changed every so often due to changes in sea level and changes in the course of the Mississippi River. In the early Cenozoic, the Gulf of Mexico and the Mississippi delta extended as far north as Illinois.

  1. This a purely Uniformitarian interpretation and as such has no bearing on Flood geology.
  2. A map of these alleged past coast lines show no hint of a Mississippi River delta.