Tidal Signatures and Their Preservation Potential in Stratigraphic Sequences - Principles of Tidal Sedimentology - page 42

Fig. 3.9 Example of
bedforms (ripples) preserved
in the ancient stratigraphic
record in the Cretaceous of
the San Juan Basin, New
Mexico, USA. Note also that
there are trails on the surface,
probably made by a mobile
invertebrate
Fig. 3.10 Ripples with mud
in the troughs; the beginnings
of the formation of fl aser
bedding: ( a ) a modern
example from the Bay of
Fundy, Canada and ( b ) from
the Precambrian Baraboo
Quartzite of Wisconsin, USA