Carbonate Aquifers - Trace Fossils as Indicators of Sedimentary Environments - page 853

FIGURE 7 Comparison of geophysical logs, optical borehole image, gray-scale high-contrast OBIs, and core photos for test corehole G-3837 that penetrates the
relict barrier bar of Halley et al. (1977) within the upper part of the Miami Limestone, which is assigned to marine isotope stage 5e. Data show evidence that the tiering
within burrower paleocommunities is influencing development of ichnogenic macroporosity and permeability, permitting a concentrated flow of groundwater into or
out of the borehole between the depths of about 6.1 and 7.7 m. This interval has a higher permeability that is linked to a deep-tiered, large-diameter, Ophiomorpha -
dominated ichnofabric. An overlying shallow tier, small-diameter, Ophiomorpha -dominated ichnofabric is less permeable.