Porosity and Permeability in Bioturbated Sediments - Trace Fossils as Indicators of Sedimentary Environments - page 820

FIGURE 6 Examples of each class of biogenic flow media from drill cores, which is 10 cm in diameter. (A) Surface-constrained discrete heterogeneities (SCD).
(B) Example from Jurassic strata of Germany with Thalassinoides (Th) and Palaeophycus (Pa) indicated. (C) Non-constrained discrete heterogeneities (NCD). (D)
Example, with Chondrites (Ch) indicated, from the Debolt Formation, Mississippian, Alberta. (E) Weakly defined textural heterogeneities (WDH). (F) Example from
Jurassic strata, North Sea. Ophiomorpha irregulaire (Oi), O. nodosa (On), and Palaeophycus (Pa) are indicated. (G) Cryptic biogenic heterogeneities (CBH). (H)
Example from Jurassic strata, North Sea. (I) Diagenetic textural heterogeneities (DTH). (J) Example from Wabamun Formation, Devonian, Alberta (Canada).