Introduction

Hydrothermal Dolomites in the Early Albian (Cretaceous) Platform Carbonates (NW Spain): Nature and Origin of Dolomites and Dolomitising Fluids

“…Calcitised, non-luminescent part of CCD-I represent less depleted δ 18 O and depleted δ 13 C values (Fig. 11a, b), likely formed near meteoric recharge (Choquette and James, 1988;Niemann and Read, 1988;Meyers, 1991;Reeder, 1991).…”

Karst systems analyzed using borehole logs — Devonian carbonates of the Świętokrzyskie (Holy Cross) Mountains, central Poland

“…Signs of three karst periods -the Devonian (syndepositional, sensu Choquette and James, 1988), the Permian-Triassic and the Cenozoic (both regional) -can be observed in the Devonian carbonates of the Świętokrzyskie Mountains. Cenozoic karst forms are extensively developed and quite common in Devonian carbonates.…”

Clay cortex in epikarst forms as an indicator of age and morphogenesis—case studies from Lublin–Volhynia chalkland (East Poland, West Ukraine)

“…Lithofacies of both units indicate diachronous formation and infilling of the dolines as a result of the following processes: (1) chemical weathering of carbonate rocks in the lower and middle Pliocene and (2) subaqueous deposition in the upper Pliocene (Harasimiuk, 1975;Harasimiuk et al, 1981). Unit 1 is related to typical, in situ chemical weathering of chalky marl, as indicated by the massive and homogeneous clay (clay cortex) and its gradual transition to the weathered carbonate massif (Jakucs, 1977;Choquette and James, 1988;Ford and Williams, 1989). Lacustrine deposition is indicated by the occurrence of sandy-silty rhythmites (unit 2).…”

“…3E and H). These features indicate that it is a residuum formed in situ as a result of chemical weathering of karstified rocks (Mathieu and Stoops, 1974;Jakucs, 1977;Choquette and James, 1988;Ford and Williams, 1989). Clay grades into infill, which is composed of quartz grains, predominantly silt- Table 1 The selected results of thermoluminescence dating of the materials filling the pipes in Lublin-Volhynia chalkland after Dobrowolski (2006) and Dobrowolski and Fedorowicz (2007); the samples are coded like the sites presented in Fig.…”