Examine sample P.
There is a prominent sedimentary structure to be seen in this sample. Identify this primary sedimentary structure.
graded bed(s)
current ripple marks (also called "asymmetrical ripple marks")
cross-bedding
bimodal cross-bedding
wave ripple marks (also called "symmetrical ripple marks" or "oscillation ripple marks")
mudcrack(s) (also called dessication cracks)
salt cast(s) (preserved cubic shapes of halite crystals, now formed from sedimentary rock)
flute(s)
flute cast(s)
fossil plant roots (trace fossils)
animal burrows (trace fossils)
animal tracks, trackways, and trails (trace fossils)
body fossils (once-living tissue or skeletal material)