Editing Polystrate fossil (section)

====Deltaic deposits====
Within excavations for [[Interstate Highway 10]] in the United States of America, and in [[borrow pit]]s, in landfills, and archaeological surveys, unfossilized upright trees have been found buried within late Holocene, even historic, [[fluvial]] and [[River delta|deltaic]] sediments underlying the surface of the [[Mississippi River Delta]] and the [[Atchafalaya Basin]] of [[Louisiana]]. In one case, borrow pits dug in the natural levees of [[Bayou Teche]] near [[Patterson, Louisiana]], have exposed completely buried, 4 to 6 feet (1.2 to 1.8 meters) high, upright trunks of [[Taxodium|cypress]] trees. Northeast of [[Donaldsonville, Louisiana]], a borrow pit excavated for fill used to maintain nearby artificial levees, exposed three levels of rooted upright tree trunks stacked on top of each other lying completely buried beneath the surface of Point Houmas, a patch of floodplain lying within a meander loop of the current course of the Mississippi River.<ref>Heinrich, P.V., 2002, ''Buried forest provide clues to the past'', Louisiana Geological Survey News 12(2):1</ref><ref>Heinrich, P.V., 2005, ''Significance of buried forests exposed in the Lemannville cutoff road pit, St. James, Louisiana.'' Louisiana Geological Survey News 15(2):8-9.</ref>  While searching for buried archaeological sites, archaeologists excavated a 12&nbsp;ft (3.6 meter) high upright rooted cypress tree completely buried within a natural levee of the [[Atchafalaya River]] within the Indian Bayou Wildlife Management Area just south of [[Krotz Springs, Louisiana]]. Radiocarbon dates and historic documents collected for this archaeological survey, during which this and other upright trees were found, of the Indian Bayou Wildlife Management Area demonstrated that these upright trees were buried in the 1800s, during the initial diversion of [[Mississippi River]]'s flow into the Atchafalaya River.<ref>Godzinski, M., R. Smith, B. Maygarden, E. Landrum, J. Lorenzo, J.-K, Yakubik, and M.E. Weed, 2005, ''Cultural Resources Investigations of Public Access Lands in the Atchafalaya Basin Floodway, Indian Bayou South Project Area, St. Landry and St. Martin Parishes, Louisiana''. Report submitted by Earth Search, Inc., New Orleans to the U.S. Army Corps of Engineers under contract number DACW29-02-D-0005, Delivery Order 05</ref>