Table 1.

Ecosystem engineering impact (EEI) values for key trace fossils from the Chapel Island Formation, Fortune Head, Newfoundland, Canada

Ichnogenus(a) Depth*(b) Functional group(c) Bioirrigation(d) EEI value§
Planolites1–32–325–8
Gordia1–2214–5
Helminthoidichnites11–213–4
Monomorphichnus1113
Psammichnites1–21–213–5
Palaeophycus1–22–325–7
Skolithos2–3326–7
Treptichnus32–62–37–12
Gyrolithes32–62–37–12
Teichichnus3–43–528–11
?Thalassinoides33–5310–12
  • *After Bambach et al. (2007): 1, surficial; 2, semi-infaunal; 3, shallow infaunal (<5 cm); 4, deep infaunal (>5 cm).

  • After Solan & Wigham (2005): 1, epifaunal locomotion; 2, surficial modification; 3, biodiffusion; 4, regeneration; 5, downward-/upward-conveying; 6, gallery biodiffusion.

  • Likelihood burrow/trace was bioirrigated: 1, highly improbable; 2, possible; 3, probable.

  • §EEI calculated as a range based on the addition of minimum–maximum values for columns a, b and c.