FIGURE 5 in Hidden subsurface garden on own faeces - the trace fossil Tubulichnium rectum (Fischer-Ooster, 1858) from the Cretaceous-Palaeogene deep-sea sediments

FIGURE 5. Macroscopic and microscopic and SEM observations of Tubulichnium rectum (Fischer-Ooster, 1858) occurring in turbiditic sandstones of the Inoceramian Beds (Upper Cretaceous–Paleocene), Słopnice, Poland (1, 4-8) and turbiditic marls of the Pagliaro Formation (Paleocene), Italy (2, 3): 1, specimen with elevated edges and bent down roof as seen on upper bedding surface (INGUJ144P195); 2, 3, depressions of pellets in the burrow margin after pellets have been partly or completely removed (INGUJ196P36 and 38); 4, photomicrograph of transverse cross-section; note deformed laminae above the collapsed burrow; 5, 6, burrow margin showing depressions of pellets that have been removed by weathering; 7, part of split pellets in place consisting of clay minerals and siliciclastic silt grains; 8, outer part of a split pellet showing platy minerals oriented ±parallel to surface.