Planolites Nicholson, 1873
Simple, unlined, unbranched cylindrical or subcylindrical infilled burrows, straight to gently curved, horizontal to oblique to bedding planes. Burrows may cross-over. Lithology of fill differs from that of host rock.
Deposit feeding, dwelling.
Shallow marine - deep marine deposits to continental. Found in alluvial, lacustrine, and eolian settings.
Various invertebrate burrowing organisms including worms and insects.
(Hantzschel, 1975)(Pemberton and Frey, 1982)(Fillion and Pickerill, 1990)(Buckman, 1995)(Keighley and Pickerill, 1995)(Uchman, 1998)(Ekdale et al., 2007: eolian)
Often difficult to distinguish between Palaeophycus
, a passively filled burrow, from Planolites
, a burrow formed by active backfill that may be of similar size, shape and orientation (Pemberton and Frey, 1982; Buckman, 1995; Keighley and Pickerill, 1995).