Depositional environment
combination of physical, chemical and biological processes associated with the deposition of a particular type of sediment
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.g. banded iron formations).
Types of depositional environments
Continental
Alluvial – Loose soil or sediment that is eroded and redeposited in a non-marine settingPages displaying short descriptions of redirect targets – type of Fluvial deposit. Caused by moving water in a fan shape (Alluvial Fan) and containing mostly impermeable and nonporous sediments well sorted.
Aeolian – Processes due to wind activity. Often in deserts and coastal regions and well sorted, large scale cross-beds
Fluvial – Natural flowing freshwater streamPages displaying short descriptions of redirect targets – processes due to moving water, mainly streams. Common sediments are gravel, sand, and silt.
Lacustrine – Sediment deposited by a lake – processes due to moving water, mainly lakes.
“Depositional environment” enters the record as combination of physical, chemical and biological processes associated with the deposition of a particular type of sediment. Crown Archives preserves that source wording while asking what Depositional, environment and combination can confirm, complicate or overturn.
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The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Sep 15, 2025. The linked authority identifier is Q1994702. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Depositional environment” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.