Monocraterion
Monocraterion A single, tube-like, vertical burrow that has a series of stacked funnel structures that point towards the top surface of the bed. The multiples of funnel structures are a response to increased sedimentation and reflect the upward migration of the animal.
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Columella , columella
1. In corals, a rod-like structure formed from the swollen axial end of the counter-septum that may occur as a central structure within the… Structure , structure, social structure A term loosely applied to any recurring pattern of social behaviour; or, more specifically, to the ordered interrelations… rhyncholite , rhyncholite One of the beak-like structures which are considered to be the upper jaw structures of fossil cephalopods (Cephalopoda). They are approxi… Sedimentary Structures , sedimentary structure The external shape, the internal structure, or the forms preserved on bedding surfaces, generated in sedimentary rocks by sedim… Multiple , mul·ti·ple / ˈməltəpəl/ • adj. having or involving several parts, elements, or members: multiple occupancy a multiple birth. ∎ numerous and often var… punctate , punctate
1. Applied to any structure that is marked by pores or by very small, pointlike depressions.
2.. Applied to a type of brachiopod (Brachiopod…
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Monocraterion