Editing Alluvium (section)

==Age==
Most alluvium is [[Quaternary]] in age and is often referred to as "cover" because these sediments obscure the underlying [[bedrock]]. Most sedimentary material that fills a [[Sedimentary basin|basin]] ("basin fill") that is not [[Lithification|lithified]] is typically lumped together as "alluvial".<ref name=EB>{{Cite EB1911|wstitle=Alluvium}}</ref> Alluvium of [[Pliocene]] age occurs, for example, in parts of Idaho.<ref>{{Citation | last = Ames | first = Dan | contribution = Formation of the Soils | year = 1998 | title = Soil Survey of Jerome County and Part of Twin Falls County, Idaho | url = https://archive.org/details/usda-contents/page/238/mode/1up | pages = 238 | publisher = Natural Resources Conservation Service, [[United States Department of Agriculture]] | contribution-url = https://web.archive.org/web/20220223221606/https://www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/idaho/ID704/0/id704_text.pdf}}</ref> Alluvium of late [[Miocene]] age occurs, for example, in the valley of the [[San Joaquin River]], California.<ref>{{cite book | url=http://pubs.usgs.gov/pp/1197/report.pdf | title=Amount and Timing of Late Cenozoic Uplift and Tilt of the Central Sierra Nevada, California—Evidence from the Upper San Joaquin River Basin (USGS Professional Paper 1197) | publisher=[[USGS]] | author=Huber, N. King | year=1981 | location=Washington D.C. | pages=13}}</ref>