The celebrated Carlsbad Caverns in New Mexico, USA, sit in a deposit of limestone 80 km long that extends into Texas and forms part of the Guadalupe Mountains. This is one of many such limestone deposits found in ancient rocks around the world. They contain abundant fossils of marine organisms such as corals, sponges, crinoids, shells and calcareous algae.
When long-age geologists interpret these deposits, they assume that they formed in marine environments like those we see in the oceans today. Thus, they say that the huge limestone deposits represent ancient ‘reefs’ that were slowly built in situ by the marine organisms themselves.
Sceptics often throw this ‘reef’ interpretation at Bible-believing geologists. They argue that it would have taken many thousands of years for the marine organisms to build such huge reefs, so this could not have occurred during the year of the biblical Flood.
However, when we examine these so-called ‘reefs’, we discover that they did not grow in place. For example, the limestone hosting the Carlsbad Caverns is composed largely of loose, unbound sediments and fossils. With sufficient volumes of water, the material could have been washed into its present location quickly.
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