Facies, Sequences and Sand-Bodies of the Principal Clastic Depositional Environments | SpringerLinkYou are currently using the site but have requested a page in the site. Would you like to change to the site? Harold G. Reading Editor. Table of contents Contributors.
Concepts of sedimentary environments
In geology, depositional environment or sedimentary environment describes the combination of physical, chemical and biological processes associated with the deposition of a particular type of sediment and, therefore, the rock types that will be formed after lithification , if the sediment is preserved in the rock record. In most cases the environments associated with particular rock types or associations of rock types can be matched to existing analogues. However, the further back in geological time sediments were deposited, the more likely that direct modern analogues are not available e. Depositional environments in ancient sediments are recognised using a combination of sedimentary facies , facies associations , sedimentary structures and fossils , particularly trace fossil assemblages, as they indicate the environment in which they lived. From Wikipedia, the free encyclopedia.
Six ca. Five of these cores were selected for palaeoenvironmental studies. Five stratigraphie units are recognised, which together with volcanic ash beds and magnetic susceptibility profiles, were used to correlate the cores. A geochronology for the cores has been established by means of Pb assays of the uppermost part of the record, radiocarbon dating and varve counts. Three facies: laminites varves , homogenites, and unlaminated clays were recognised and used to interpret the depositional environment.