Figure 9. SEM images of the Circular sample: (A) C3, interparticle pores between minerals; (B) C10, interparticle pores and calcite matrix; (C) C16, calcite matrix; (D) C21, interparticle pores between minerals; (E) C34, pyrite; (F) C34, clay minerals and intraparticle pores; (G) C37; organic matter; (H) C37; clay minerals and intraparticle pores; and (I) C37; interparticle pores between minerals.