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FIGURE 5
Mixed tidal flat. (A) Cross-section view of
Rusophycus leifeirikssoni
(
Ru
) in mixed
tidal-flat deposits. Note associated syneresis cracks (Sc). Angosto del Morro de Chucalezna, Queb-
rada de Huamahuaca, northwest Argentina. (B) Bedding-plane view (top) of a cluster of
R. leifei-
rikssoni
in mixed tidal-flat deposits. Early to Middle Cambrian, Campanario Formation, Mes´n
Group, Angosto del Morro de Chucalezna, Quebrada de Huamahuaca, northwest Argentina.
Hammer is 33.5 cm long. (C)
Psamichnites grumula
preserved on a sandstone base. Note siphon
traces (arrow). Late Carboniferous, Stull Shale, Kanwaka Formation, Waverly fossil site, Kansas,
USA. (D) Dinosaur tracks in tidal-flat deposits. View of a sandstone surface (top) with large
ornithopod trackways (
Caririchnium leonardii
) and small theropod trackways (
Magnoavipes
loewi
). Early Cretaceous, Dakota Group, Alameda Avenue, west of Denver, Colorado, USA.
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