Environmental Engineering Reference
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FIGURE 5
Examples of invertebrate ichnotaxa with biostratigraphic significance in shallow-marine
rocks. (A)
Treptichnus pedum
. Lower Cambrian, Klipbak Formation, Brandkop Subgroup, near
Brandkop, South Africa. Scale bar
1 cm. (B)
Cruziana rugosa rugosa
. Arenigian-Llanvirnian,
Mojotoro Formation, Quebrada del Gallinato, Argentina. Scale bar
¼
5 cm. (C)
Arthrophycus allegha-
¼
niensis
. Lower Silurian, Medina Sandstone, Rochester, USA. Coin
1.9 cm.
¼
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