River delta deposits cannot form underwater, and thus could not have been acccelerated by Noah's Flood. The rate of coral reef growth is inherent in the organisms that build the reef, and also would not be affected by Noah's Flood. Both are observed in volumes that would take at least hundreds of thousands of years to accumulate. The formation of stalactites in caves requires small amounts of water, increasing the flow of water will stop the carbonate precipitation rather than increase it (quick-forming stalactites under artificial concrete structures are due to an entirely different chemical process). A 3-meter stalactite would take 30,000 years to form. In addition, the cooling of large underground granite batholiths, as well as the formation of metamorphic rocks, requires much more than 10,000 years.