Publications

Four reef terraces (6, 15, 30, and 50 m) have been well developed in the Southern Dominican Republic during Pliocene-Pleistocene period. Highly amplitude and frequency of sea level fluctuation during Plio-Pleistocene coupled by highly uplift rate within the Hispaniola region (Mann et al., 1995) have repetitively exposed these reef terraces into marine and freshwater diagenesis within the period of sea-level highstand and lowstand. These diagenetic processes have resulted in welldeveloped meteoric cements, porosity, and dolomitization. As a consequence of repetition of meteoric diagenesis, meteoric cements produced within the older terraces have overprinted the previous diagenetic products (marine and meteoric). This study is to compare diagenetic products of the older terraces (15, 30, and 50 m) and the youngest terrace (6 m). In addition, dolomitization encountered at depth in the 15 and 30 m terraces,rose to the question as to whether the dolomitization is formed by mixing (meteoric and marine) mechanism or by normal marine mechanism. To answer into this question, dolomitized zones were analyzed using X-ray mineralogy, δ13C and δ18O isotopes, and Srisotopes. These data suggested that the dolomitization occurred under slightly to normal seawater condition.