The structures described below are all "secondary" structures in the sense that they show modification of the sediment after it was deposited but before it underwent diagenesis (the process that …

Structures that characterize deposition caused by chemical and biologically influenced processes are explained and illustrated, along with the complex efects of chemical changes, and of animal and …

This chapter discusses the Post-depositional structures resulting from events that take place after sediment is deposited. These structures include features that are intrinsic to the …

Feb 28, 2022 · The sedimentary features identified in the study area are grouped into primary depositional structures, diagenetic structures and SSDS and these are detailed in this study as follows.

Post-depositional chemical and physiochemical processes can also lead to a variety of unique sedimentary structures. If deposited on or near a slope, sediment tends to move downslope. When …

Sedimentary structures such as cross-bedding, graded bedding, and ripple marks are utilized in stratigraphic studies. They help indicate the original position of strata in geologically complex …

Dec 31, 2005 · Two types of structures exist: those that formed at the sediment surface and those that formed later, during burial.

Bioturbation occurs when organisms actively or passively disturb sediments and sedimentary structures mechanically. Bioturbation affects sediment by changing physical properties such as resistance to …

Jun 5, 2012 · Some sedimentary structures indicate that sedimentary strata were deformed at the time of deposition or soon after, when the sediment was “soft” (Allen, 1982a, 1985). Biogenic deformation …

Feb 14, 2019 · Structures that characterize deposition caused by chemical and biologically influenced processes are explained and illustrated, along with the complex effects of chemical changes, and of …