Figure 3. Typical secondary dissolution pore types in carbonate rocks that are readily identifiable in cuttings and core samples. A - interparticle pores in a grainstone (cuttings sample) and A' core showing interparticle porosity in a carbonate grainstone. B - thin-section photomicrograph of intraparticle porosity (arrows) within a fusulinid and B' core showing intraparticle porosity within a coral. C- Fenestral porosity in a tidal-flat dolomite. Tilted arrows point to planar (laminar) fenestral pores, and horizontal arrows point to smaller "birdseye" pores. D - Cuttings samples with oomoldic pores (arrows) in an oolite grainstone. E - Carbonate grainstone with identifiable skeletal particles (circled) and larger vug (arrow) that formed from the initial dissolution of a particle and then further dissolution of the matrix around it (cuttings sample). F - Thin-section photomicrograph of interparticle porosity in a carbonate sand wherein remnant cement (arrow) restricts pore throats and reduces permeability.