The occurrence of alleged fossil "reefs" in various portions of the geologic column is recognized by many observers to be a very difficult problem to reconcile with Biblical chronology. If accumulated at approximately the same rate as modern reefs, a single fossil "reef" would take thousands of years to form, and, therefore, could negate the Genesis implication of a young earth and also seriously question the role of the Noachian Flood in earth history. The famous Capitan Limestone in the Guadalupe Mountains of southeastern New Mexico and western Texas is alleged by many geologists to be a classic example of a fossil "barrier reef." Study of the strata cast doubt on the various depositional and ecologic environments alleged to be associated with "Capitan Reef." So-called "backreef lagoon" and "forereef talus" deposits were not contemporaneous with "reef" accumulation. Furthermore, the Capitan lacks large, in situ, organicallybound framework and deposits of broken debris which can be shown to be derived from an organic framework. The Capitan is composed primarily of broken fossil fragments in a fine-grained matrix of lime silt and sand which were not wave-resistant when deposited. The fossil flora and fauna of "Capitan Reef" represent a shallow water assemblage which was not especially adapted to a wave or strong current environment. Reef-forming organisms which could bind sediments and build frameworks are either altogether absent or largely inconspicuous. The available data certainly do not require many thousands of years for the Capitan to accumulate, and, therefore, seem to present little problem for Biblical chronology. Instead, the lack of large organically-bound structures, which would grow during thousands of years, suggests that deposition was very rapid. It is proposed that the Capitan Limestone accumulated either during the last stages of the Noachian Flood or shortly thereafter.