A Smithsonian trinomial (formally the Smithsonian Institution Trinomial System , abbreviated SITS ) is a unique identifier assigned to archaeological sites in many states in the United States . Trinomials are composed of a one or two digit coding for the state, typically two letters coding for the county or county-equivalent within the state, and one or more sequential digits representing the order in which the site was listed in that county. The Smithsonian Institution developed the site number system in the 1930s and 1940s, but it no longer maintains the system. Trinomials are now assigned by the individual states. The 48 states then in the union were assigned numbers in alphabetical order. Alaska was assigned number 49 and Hawaii was assigned number 50, after those states were admitted to the union. There is no Smithsonian trinomial number assigned for the District of Columbia or any United States territory.
7-731: Foster's Mound ( 22 AD 503 ) is a Plaquemine culture archaeological site located in Adams County, Mississippi northeast of Natchez off US 61 . It is the type site for the Foster Phase (1350-1500 CE) of the Natchez Bluffs Plaquemine culture chronology. It was added to the NRHP on September 2, 1982 as NRIS number 82003091. The mounds are listed on the Mississippi Mound Trail . The Foster's site has two platform mounds and
14-527: Is 220 metres (720 ft) to the south across a large plaza area. It is an amorphous blob about 1.5 metres (4.9 ft) at its highest point. It has been seriously eroded by the creek and is barely recognizable as a rectangular platform mound. The site sat at a major crossroads in Precolumbian times, because of its location on the original route of the Natchez Trace , directly connected to Emerald Mound to
21-475: Is located on the northern bank of St. Catherine Creek near its confluence with the Mississippi River . The largest mound, Mound A, is 3 metres (9.8 ft) in height and 30 metres (98 ft) by 30 metres (98 ft) at its base and has had a plantation house on its summit since the 1790s. Its dimensions were originally smaller but it was enlarged to accommodate the veranda of the plantation house. Mound B
28-690: The northeast and the Grand Village of the Natchez to the southwest, and its proximity to the Mississippi River. The site was excavated in 1971-72 by Jeffrey P. Brain as part of the Lower Mississippi Survey for the Peabody Museum of Archaeology and Ethnology of Harvard University . Pottery recovered from beneath the mounds was found to be proto- Natchezan and was instrumental in defining
35-626: The protohistoric Foster Phase (1350 to 1500 CE) of the Plaquemine culture chronology. This article about a property in Mississippi on the National Register of Historic Places is a stub . You can help Misplaced Pages by expanding it . Smithsonian trinomial Most states use trinomials of the form "nnAAnnnn", but some specify a space or dash between parts of the identifier, i.e., "nn AA nnnn" or "nn-AA-nnnn". Some states use variations of
42-457: The rectangle, and a code identifying the agency issuing the sequential number. California uses a three-letter abbreviation for counties. Connecticut and Rhode Island do not use any sub-state codes, with site identifiers consisting of the state abbreviation and a sequential number series for the whole state. Delaware uses a single letter code for counties and adds a block code (A-K) within each county, with sequential numbers for each block. Hawaii uses
49-463: The trinomial system. Arizona, California, Connecticut, Maine, Rhode Island, and Vermont use two-letter abbreviations of the state name instead of the Smithsonian number. Alaska uses three-letter abbreviations for USGS map quadrangles in place of the county code. Arizona uses a five-part identifier based on USGS maps, specifying quadrangles, then rectangles within a quadrangle, a sequential number within
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