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Excavations at the Late ArchaicEdgewater Park Sitein Coralville

Thearchaeology of Iowais the study of the buried remains ofhumanculturewithin theU.S. stateofIowafrom the earliestprehistoricthrough the latehistoricperiods. When theAmerican Indiansfirst arrived in what is now Iowa more than 13,000 years ago, they werehunters and gatherersliving in aPleistoceneglaciallandscape. By the timeEuropeanexplorers visited Iowa, American Indians were largely settled farmers with complex economic, social, and political systems. This transformation happened gradually. During theArchaic period(10,500–2,800 years ago) American Indians adapted to local environments and ecosystems, slowly becoming more sedentary as populations increased. More than 3,000 years ago, during the Late Archaic period, American Indians in Iowa began utilizingdomesticatedplants. The subsequentWoodland periodsaw an increase on the reliance onagricultureand social complexity, with increased use ofmounds,ceramics,and specialized subsistence. During the Late Prehistoric period (beginning about AD 900) increased use ofmaizeand social changes led to social flourishing and nucleated settlements. The arrival of European trade goods and diseases in theProtohistoricperiod led to dramatic population shifts and economic and social upheaval, with the arrival of new tribes and early European explorers and traders. During the Historical period European traders and American Indians in Iowa gave way to American settlers and Iowa was transformed into an agricultural state.[1]

Iowa archaeologists

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Ellison Orr’s and Theodore Lewis’ 1910 sketch of effigy mounds nearMcGregor, Iowa,now part of Effigy Mounds National Monument.

Archaeologists have studied the prehistory of Iowa since the mid-19th century, when large American Indian mounds were first observed along the Mississippi. Early archaeologists such as S.V. Proudfit and Theodore Lewis documented large sites such as earthworks, mounds, and earthlodges.[2]Truly systematic recording of Iowa sites began withCharles R. Keyesand Ellison Orr’s surveys and excavations beginning in the 1920s. Documenting hundreds of sites, often just before they disappeared under the plow, Keyes’ and Orr’s work led to the formation of the Iowa Archaeological Survey, theIowa Archeological Society,and the designation ofEffigy Mounds National Monument.After their deaths in 1951, the Survey was disbanded, and their efforts were continued by theUniversity of Iowa’s Department of Sociology and Anthropology, which formed the Office of the State Archaeologist[3](OSA) in 1959.[1]The OSA maintains an extensive list of more than 23,000 recorded archaeological sites in Iowa, and conducts survey and excavation across the state. Other institutions conducting archaeological research in Iowa include theState Historical Society of Iowa,theIowa Archeological Society,theUniversity of Iowa,Iowa State University,Grinnell College,Luther College,and private archaeological firms.[4]Professional archaeologists in Iowa are represented by the Association of Iowa Archaeologists.[5]Iowa archaeology grew dramatically beginning in the 1960s with the introduction ofCultural Resources Managementlegislation that required archaeological survey and excavation at many federal projects in Iowa.[1]

Paleoindian (13,500–10,500 years ago)

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Clovis pointsfrom the Rummells-Maske Cache Site,Cedar County, Iowa.

Paleoindianhunters and gatherers were the first occupants of Iowa, entering the state at the end of thePleistoceneglacial period. At the time the state was covered by tundra, conifer forests, and deciduous forests. Areas immediately north of Des Moines extending to Minnesota were covered by the receding Des Moines Lobe, a large glacier system. Highly mobile, their sites are scattered across Iowa and are noted for their large stone points. While Paleoindians were traditionally viewed as big game hunters, more recent research suggests much of their subsistence was derived from small game and wild plants. Paleoindian points are found throughout Iowa, but almost no intact Paleoindian sites have been excavated, probably because they were ephemeral and are now either destroyed by plowing or are very deeply buried in river valleys.[1][6]

Clovis and other Early Paleoindian

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The oldest artifacts found in Iowa areClovispoints, large lanceolate points found occasionally in all parts of the state except for the Des Moines Lobe. Possible sources of game were giant Pleistocene megafauna, including mammoth, mastodon, and giant forms of bison, all of which are now extinct. While widespread, only two Clovis sites have been excavated in Iowa. The Rummells-Maske site is a Clovis site in Cedar County; unfortunately, this site was damaged by plowing, although 20 points and point fragments were recovered.[7]The Carlisle Clovis Cache Site inWarren Countycontained 38 unfinished stone tools that appear to date to the Clovis period, but these results have not yet been published.[8]

Other Iowa Early Paleoindian points include Gainey, a point that appears to be intermediate between Clovis and Folsom. Gainey points were also recovered at Rummells-Maske. WhileFolsom pointsare found throughout Iowa, especially western Iowa, none have been excavated in a well-preserved site.[9]

Dalton and other Late Paleoindian

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At the beginning of the glacial-freeHoloceneEpoch, humans in Iowa utilized projectile point found throughout the mid-continent, includingDalton,Fayette,Agate Basin,andHell Gap.Humans were still highly mobile, and by this time most of the Pleistocene megafauna had gone extinct. As with the Early Paleoindian period, no intact Late Paleoindian sites have been excavated in Iowa.[10]

Archaic Period

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The Archaic is the longest period of Iowa prehistory, lasting about 8,000 years. Overall, populations appear to have increased in Iowa during the Archaic, despite a changing climate. During this time American Indians transitioned from highly mobile hunters and gatherers with large ranges towards a focus on local resources and ecosystems. Domesticated plants appeared in Iowa towards the end of the Archaic.[1]

Early Archaic (10,500–7,500 years ago)

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During the Early Archaic period regional variation in point forms is seen in Iowa, and Indians adapted to more localized forms of hunting and gathering while probably maintaining seasonal movements from camp to camp.[1]Common stone tool types are Corner-notched St. Charles points and Thebes Knives. Soon Hardin and Kirk points appear in Iowa as well.[11]Excavated Early Archaic sites in Iowa include the Soldow Site,[12]Horizons IIIa and II of theCherokee Sewer Site,[1][13]and the Simonsen Site.[14]

Middle Archaic (7,500–5,000 years ago)

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Temperatures rose in the mid-continent during the Middle Archaic, a warming trend known as theHypsithermal.Grasslands expanded east, forests became less common, and many Iowa lakes shrank or disappeared. Humans responded by diversifying their subsistence strategy: eastern Iowa saw a shift towards river resources, and western Iowa towards Plains resources. Excavated sites in eastern and central Iowa include the Brash Site,[15]the Gast Spring Site,[1]and the Ed’s Meadow Site.[16]Western Iowa sites include the Turin Site,[17]Horizon I of theCherokee Sewer Site,[13]and the Pony Creek Site.[18]

Late Archaic (5,000–2,800 years ago)

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In the Late Archaic the climate became more similar to modern with the end of theHypsithermal.The number of Late Archaic Sites increased in Iowa, perhaps reflective of increased populations allowed by climate change and new subsistence strategies. The Late Archaic sees the first indication of mound building in Iowa, as well as direct evidence of domesticated plants, and large, long-term settlements. TheRed Ocher Cultureappeared in northeast Iowa, associated with copper artifacts and mound building. Numerous Late Archaic sites have been excavated in eastern Iowa, some showing the gradual adaptation ofcultigens,includingsquash,little barley,marsh elder,andbarnyard grass.[19]Sites with evidence for early cultigens in Iowa include theEdgewater Park Sitein Coralville,[20]the Gast Spring Site,[1][21]and the Sand Run Slough West Site.[22]In western Iowa, Late Archaic sites are common, however large bison killing or processing sites are less common than before, and there is little evidence for the use of domesticated plants.[23]

Woodland Period

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Woodland conical mounds atEffigy Mounds National Monument,Sny Magill Unit, Clayton County, Iowa.

During the Woodland period, many American Indians in Iowa shifted away from hunting and gathering and used more domesticated plants, although wild food was still important.Ceramics,thebow and arrow,burial mounds,and evidence of political and social hierarchy became common at Woodland sites in Iowa.[1]

Early Woodland (800 BC–200 BC)

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The Early Woodland period saw the introduction of ceramics to Iowa, including Marion Thick and Black Sand types. Marion Thick may have originated with the nucleated Late Archaic cultures of the Upper Midwest, and was widespread in distribution.[24]Early Woodland Indians in eastern Iowa built large burial mounds in the Mississippi River region, and participated in long-distance trade of exotic raw material. This long-distance trade may have been the forerunner of the later Havanna-Hopewelltrading sphere. In north-central Iowa, Early Woodland peoples appear to have interacted more directly with thePrairie Lakesregion ofMinnesota.Numerous Early Woodland sites have been excavated in Iowa, including the Gast Spring Site,[1]and many sites which have not been formally published.[25]

Middle Woodland (200 BC–400 AD)

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The Middle Woodland Indians of eastern Iowa participated at the edge of the Havana and Hopewell interaction networks. This cultural connection to the East is seen in the construction of large mounds, earthworks, and the trade of exotic goods over very long distances. There were several large earthwork enclosures in Iowa along the Mississippi that date to the Middle Woodland period, but none in the interior of the state, indicating Iowa is the western edge of Havana-Hopewell influence.[26]TheToolesboro Mound Groupin Louisa County included a large octagonal earthen enclosure that covered several acres; earthworks of this style are indicative of the monumental construction once seen inHavana, Illinoisalong the Illinois River and sites in the Ohio River drainage including Chillicothe and Newark, Ohio.Hopewelltrading networks were quite extensive, withobsidianfrom theYellowstonearea,copperfromLake Superior,and shells from theGulf Coastappearing in Middle Woodland Iowa sites. Sites in eastern Iowa appeared to nucleate, vacating much of the hinterlands.[27]Western Iowa appears to have been not directly involved in this exchange network, and the Havana-Hopewell flourishing did not extend much above theKansas Cityarea of theMissouri River.[28]

Late Woodland (400–1250 AD)

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The Late Woodland Period was once considered to be relatively unimportant and uninteresting compared to earlier and later periods, but recent research shows unexpected cultural complexity.[1][29]Late Woodland sites are more dispersed than Middle Woodland sites, but they are apparently more numerous. Gone are the complex earthworks and long-distance trade networks, but this does not appear to be a cultural collapse, since Late Woodland sites and artifact types overlap with and transition from Middle Woodland sites. Technical changes of the Late Woodland include the use of true arrow heads, thinner and larger ceramics with less elaborate decorations, and the adaptation of new crops, includingmaize.[30]Numerous regional variations and phases have been defined in Iowa, based in large extent on differences of ceramic form and decoration.[1]Excavations at Late Woodland sites are common, some of these sites showing surprising complexity. TheGast Farm Siteexcavations revealed a complex settlement associated with a midden of refuse 100 m in diameter. Large storage and food processing pits, trash middens, and other features were excavated. Occupants utilized acorns, other nuts and fruits, goosefoot, little barley, maygrass, sunflower, fish, birds, deer, muskrat, and turtle. There was little evidence of long-distance trade.[31]The Rainbow and M.A.D. sites provide a glimpse into the Late Archaic of western Iowa. At Rainbow, a large house was excavated, showing evidence of reuse and possible joint occupation by two families.[32]Mound building became more common during the Late Woodland Period, large groups of mounds appeared including theSlinde Mound Group,and theFish Farm Mound Group.

Effigy Mounds

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The Late Woodland in Iowa is perhaps best known foreffigy mounds,large, low mounds shaped like animals such as birds and bears. Effigy mounds are distributed across southernWisconsin,northernIllinois,and northeast Iowa. A large concentration of mounds in several groups is preserved atEffigy Mounds National Monument.Like most mounds in Iowa, excavation reveals that these mounds were commonly used as sacred burial locations but contain few artifacts.[33]Recent ground-penetrating radar survey of selected mounds at Effigy Mounds National Monument reveal that many are badly disturbed, but others appear to be comparatively intact.[34]TheFolkert Mound Groupin central Iowa contains an enigmatic cruciform mound that may or may not be astronomically aligned.[35][36]

Late Prehistoric (900–1600)

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Map of archaeology of Fort Des Moines in downtownDes Moines

Maizeappears to have been the catalyst for change in the Late Prehistoric period in Iowa. While maize had been a minor crop in the Woodland Period, many archaeologists believe new varieties of maize were introduced to the region that produced higher yields, allowing for a population boom. This increase in population, combined with the potential for surplus and growing tensions over control of territory, appears to have led to large nucleated settlements throughout the eastern U.S.[37]Although this manifested itself earliest along the Mississippi south of Iowa, the earliest Late Prehistoric cultures appeared in the western part of the state.[38]

Great Oasis (ca. 900–1100)

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Great Oasissites appeared in the Missouri River drainage, and have attributes of both Late Woodland and Late Prehistoric cultures. Great Oasis cultures extended through the eastern Plains from Iowa to South Dakota. Developing independently from the eastern Mississippian cultures, Great Oasis sites display large sites along major stream terraces, increased reliance on agriculture combined with hunting and gathering, substantial pit earth lodges, and a transition from Late Woodland to Late Prehistoric ceramic forms. Overall, Great Oasis appears to have been a regional adaptation of new forms of farming and settlement patterns, including seasonal occupation of different ecological zones, that includes aspects of Late Woodland and the subsequentMiddle Missouri Tradition.[1][39][40]

Mill Creek and Glenwood (1100–1300)

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Reconstructed Glenwood earthlodge,Glenwood, Iowa

In northwestern Iowa, Great Oasis underwent dramatic changes as Mill Creek sites appeared. While Mill Creek has many stylistic similarities with Great Oasis and some Mill Creek sites contain Great Oasis ceramic forms, Mill Creek sites are substantially different. Mill Creek sites became nucleated, often fortified, had a much higher dependence onmaizeand bison hunting, show substantial evidence of long-distance trade, and appear to have been occupied year-round. ThePhippsandChan-Ya-Tasites are classic examples.Glenwood culturesites in southwest Iowa near the Missouri River appear to be unrelated to the earlier Great Oasis sites, and are notable for their largeearthlodgesites. Glenwood sites appear to have been more oriented in lifeways and trade with theCentral Plains Traditioncultures to the west than with the Mississippian cultures to the southeast. Around 1300 AD Mill Creek and Glenwood sites in Iowa disappeared, replaced by the rapidly spreading Oneota cultures.[41][42][43][44][45]

Oneota (1250–1700)

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Excavation of the Oneota component of the Birds Run Site inDes Moines

Very largeMississippiancenters appeared around AD 1000, with enormousearthen pyramids,palisades,and extreme social hierarchy. The earliest large Mississippian center wasCahokia,east ofSt. Louis.Cahokia appears to have dominated trade in the upper Mississippi, with satellite or closely aligned settlements as far asAztalanin Wisconsin.[1][46]In Iowa, there is little evidence of Mississippian occupation, and the Late Woodland lasts longer in the east than in the west. This is puzzling, given the proximity to Mississippian cultures; it is possible that the nearby presence of the large, hierarchal Mississippian trading network inhibited local development.[1]After the decline of the Cahokia network after AD 1250 the local LateWoodlandpopulations expanded in complexity, developing large nucleated villages and their own trading network, known asUpper MississippianOneota.Oneota, named by Charles Keyes for ariver in northeast Iowa,was a large cultural manifestation that covered the Upper Midwest at the edge of the Mississippian cultures. Oneota sites are easily identifiable by the globular,shell-temperedpots, which typically have strap handles and incised designs. Pots of this kind were well designed for the cooking of porridge and foods made from the various cultivated foods of the area. Important Oneota sites in Iowa include Kingston,[47]Mckinney,[48]Christenson,[49]Blood Run,[50]Hartley Fort,theLane Enclosure,[51]three sites in downtownDes Moines,[52][53]and sites along the Upper Iowa River, including several large earthwork enclosures.[26][54]After the decline of the Mill Creek and Glenwood cultures in western Iowa, Oneota cultures appeared across the state. It is widely accepted that the Oneota were the ancestors of modern American Indian tribes associated with Iowa, including theIoway,Ho-Chunk(Winnebago),Otoe,Missouria,andOmaha.[1]

Protohistoric (1600–1800)

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Catlinite pipe, probably Ioway, from the Protohistoric Wanampito Site (13BM16), Bremer County, Iowa.

Protohistoric refers to the period when American Indians were exposed to European trade items and large population shifts occurred because of introduced European diseases and warfare, but there is very little direct written documentation. Explorers such asMarquetteandJolietoccasionally documented American Indians along the Mississippi in Iowa, but it was not until the early 19th century that regular written accounts of American Indians in Iowa became common. American Indians in the early Protohistoric period continued many aspects of Oneota culture, but soon almost all indigenous technology disappeared, including ceramics and stone tool production.[55]It was during this period that theMeskwaki(Fox) andSaukappeared in eastern Iowa, displaced from their homelands in the east. Important protohistoric sites include Milford;[56]Blood Run;Gillett Grove;[57]andIowaville.[58]

Historical (1800–present)

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Pierre-Jean De Smet's map of theCouncil Bluffs, Iowaarea (1839), showing Native American villages and early American settlement.

The earliest European forts and settlements were established by traders beginning in the 1680s. Almost none of these ephemeral early historical sites have been located archaeologically.Julien Dubuque’s Mines of Spain settlement and adjacent Meskwaki village occupied in the late 18th century and early 19th century, has been the subject of numerous archaeological surveys.[59]Fort Madison(1808–1813), the first American settlement and the first American fort in Iowa, was partially excavated in 1965.[60]American settlement began in earnest in the 1830s, and the official removal of American Indians from Iowa was completed by 1852. Several of these historical sites have been excavated, including Gilbert’s Trading Post.[61]and Fort Atkinson.[62]Archaeologists have also studied historical American settlements, including excavations at thePlum Grove Historic House,[63][64]theBuxtonAfrican-American community,[65]and the Bowen’s Prairie community.[66]

See also

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References

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  1. ^abcdefghijklmnopqAlex, Lynn M. (2000).Iowa's Archaeological Past.University of Iowa Press. Archived fromthe originalon 2009-11-20.Retrieved2009-09-08.
  2. ^Proudfit, S. V. (1880) Antiquities of the Missouri Bluffs.American Antiquarian3:271–280; Lewis, Theodore H. (1885) Effigy Mounds in Iowa.Science6(146):453–454
  3. ^Iowa Office of the State Archaeologist,"The University of Iowa Office of the State Archaeologist".Archived fromthe originalon 2008-05-25.Retrieved2008-06-02.
  4. ^"Association of Iowa Archaeologists: Membership Directory".Uiowa.edu. Archived fromthe originalon 2009-07-16.Retrieved2009-07-22.
  5. ^Association of Iowa Archaeologists,"The Association of Iowa Archaeologists".Archived fromthe originalon 2008-07-09.Retrieved2008-06-09.
  6. ^Iowa's Earliest Residents,"Crops of Ancient Iowa - Iowa's Earliest Residents: The Office of the State Archaeologist at the University of Iowa since 1959".Archived fromthe originalon 2010-04-10.Retrieved2010-03-01.
  7. ^Anderson, Adrian D., and Joseph A. Tiffany (1972) Rummells-Maske: A Clovis Find-Spot in Iowa.Plains Anthropologist17:55–59
  8. ^The Carlisle Cache,"Crops of Ancient Iowa - Rummells-Maske Site: The Office of the State Archaeologist at the University of Iowa since 1959".Archived fromthe originalon 2010-04-10.Retrieved2010-03-01.
  9. ^Alex 2000:49–50; Morrow, Julie, "The Early Paleoindian Period""The University of Iowa Office of the State Archaeologist: The Early Paleoindian Period".Archived fromthe originalon 2008-05-16.Retrieved2008-06-02.
  10. ^Alex 2000:50–53
  11. ^Morrow, Toby; "The Late Paleoindian/Early Archaic Period""The University of Iowa Office of the State Archaeologist: The Late Paleoindian/Early Archaic Period".Archived fromthe originalon 2008-05-16.Retrieved2008-06-02.
  12. ^Flanders, Richard E. (1977) The Soldow Site, 13HB1: An Archaic Component from North Central Iowa.Journal of the Iowa Archeological Society24:125– 147
  13. ^abAnderson, Duane C., and Holmes A. Semken, Jr. (eds.) (1980)The Cherokee Excavations: Holocene Ecology and Human Adaptations in Northwestern Iowa.Academic Press, New York
  14. ^Frankforter, W. D., and George A. Agogino (1960) The Simonsen Site: Report for the Summer of 1959.Plains Anthropologist5:65–70
  15. ^Collins, James M. (1995) Lithic Technology and Temporal Variation at a Chert Workshop in Central Iowa.Journal of the Iowa Archeological Society42:8–20
  16. ^Morrow, Toby A. (1998)Phase III Excavations at the Ed’s Meadow Site (13DM712).Office of the State Archaeologist, University of Iowa, Iowa City
  17. ^Fisher, Alton K. (1985) Turin: A Middle Archaic Burial Site in Western Iowa.Plains Anthropologist30:195–218
  18. ^Reeves, Brian (1973) The Concept of an Altithermal Cultural Hiatus in Northern Plains Prehistory.American Anthropologist75:1221–1253
  19. ^Crops of Ancient Iowa,"Crops of Ancient Iowa - Cast of Plants: The Office of the State Archaeologist at the University of Iowa since 1959".Archived fromthe originalon 2010-04-10.Retrieved2010-03-01.
  20. ^Whittaker, William E., Michael T. Dunne, Joe Alan Artz, Sarah E. Horgen, and Mark L. Anderson (2007) Edgewater Park: A Late Archaic Campsite along the Iowa River.Midcontinental Journal of Archaeology32(1):4–46;http://findarticles.com/p/articles/mi_qa3904/is_200704/ai_n19433705
  21. ^Dunne, Michael T., and William Green (1998) Terminal Archaic and Early Woodland Plant Use at the Gast Spring Site (13LA152), Southeast Iowa.Midcontinental Journal of Archaeology23(1):45–88
  22. ^Alex 2000:76–77
  23. ^Alex 2000:78–79
  24. ^Alex 2000:88; Klippel, Walter E. (1972) An Early Woodland Period Manifestation in the Prairie Peninsula.Journal of the Iowa Archeological Society19:1–91
  25. ^Alex 2000:87–98
  26. ^abWhittaker, William; William Green (2010)."Early and Middle Woodland Earthwork Enclosures in Iowa".North American Archaeologist.31(1): 27–57.doi:10.2190/NA.31.1.b.S2CID162414387.Archived fromthe originalon 28 January 2013.Retrieved18 December2010.
  27. ^Alex 2000:100–109
  28. ^Alex 2000:112–115
  29. ^Benn and Green 2000
  30. ^Alex 2000:115–118
  31. ^Benn, David W., and William Green (2000) Late Woodland Cultures in Iowa. InLate Woodland Societies: Tradition and Transformation across the Midcontinent,ed. T. E. Emerson, D. L. McElrath, and A. C. Fortier, pp. 429–496. University of Nebraska Press, Lincoln, Nebraska
  32. ^Benn, David W. (ed.) (1990)Woodland Cultures on the Western Prairies: The Rainbow Site Investigations.Report 18. Office of the State Archaeologist, University of Iowa, Iowa City
  33. ^Lenzendorf, Dennis (2000)Effigy Mounds: A Guide to Effigy Mounds National Monument.Eastern National, Fort Washington, Pennsylvania
  34. ^Whittaker, William E., and Glenn R. Storey (2008) Ground-Penetrating Radar Survey of the Sny Magill Mound Group, Effigy Mounds National Monument, Iowa.Geoarchaeology23:474–499
  35. ^Collins and Whittaker (2007)Digital Mapping and Ground-Penetrating Radar Survey of the Folkert Mound Group (13HA30), Hardin County, Iowa.Contract Completion Report 1395. Office of the State Archaeologist, University of Iowa, Iowa City
  36. ^Horton (2007) A Star Explodes! A.D. 1054: Did Prehistoric Native Iowans Witness and Record this Titanic Stellar Event?Newsletter of the Iowa Archeological Society57(3):1–2
  37. ^Alex 2000:142–145
  38. ^Alex 2000:138–139
  39. ^Anderson, Adrian D. (1961) The Glenwood Sequence: a Local Sequence for a Series of Archaeological Manifestations in Mills County, Iowa.Journal of the Iowa Archeological Society10:1–101
  40. ^Henning, Dale R. (2005) The Evolution of the Plains Village Tradition. InNorth American Archaeology,Timothy Pauketatand D. D. Loren (eds.), pp. 161–186. Blackwell, Boston
  41. ^Alex 2000
  42. ^Green, William (1991) The Paul Rowe Archaeological Collection: A Key to Central Plains Prehistory.Plains Anthropologist36:79–86
  43. ^Perry, Michael J. (1998) An Archeological Survey of the Lower Pony Creek Valley: Implications for Glenwood Locality Settlement Pattern.Central Plains Archaeology6(1):35–56
  44. ^Steinacher, Terry L., and Gayle F. Carlson (1998) The Central Plains Tradition. InArchaeology on the Great Plains,W. R. Wood (ed.), pp. 235–268. University Press of Kansas, Lawrence
  45. ^Tiffany, Joseph A. (2002) Archaeological Perspectives on Southwest Iowa.Journal of the Iowa Archeological Society49:11–26
  46. ^Emerson, T. E., and R. B. Lewis (eds.) (1991)Cahokia and the Hinterlands: Middle Mississippian Cultures of the Midwest.University of Illinois Press, Urbana, Illinois
  47. ^Straffin, Dean F. (1971)The Kingston Oneota Site.Research Report 2. Office of the State Archaeologist, University of Iowa, Iowa City
  48. ^Alex 2000:197–198
  49. ^Benn, David W. (1991) The Christenson Oneota Site, 13PK407.The Journal of the Iowa Archeological Society38
  50. ^Green, William, and Clare Tolmie (2004) Analysis of Plant Remains from Blood Run.Plains Anthropologist49:525–625;"The Blood Run Site - Maps, Material Culture, and Memory: On the Trail of the Ioway: Iowa Archaeology Month: The Office of the State Archaeologist at the University of Iowa since 1959".Archived fromthe originalon 2012-01-06.Retrieved2011-12-27.
  51. ^Alex 2000:206–207
  52. ^Schoen, Christopher M. (2005) A Point of Land and Prehistoric Peoples.Iowa Heritage Illustrated86(1): 8–9
  53. ^Whittaker, William E. (2008). "Prehistoric and Historic Indians in Downtown Des Moines".Newsletter of the Iowa Archeological Society.58(1): 8–10.
  54. ^Wedel, Mildred Mott. (1959) Oneota Sites on the Upper Iowa River.The Missouri Archaeologist21(2–4)
  55. ^Alex 2000:211–226
  56. ^Tiffany, Joseph A. and Duane Anderson (1993) The Milford Site (13DK1): A Postcontact Oneota Village in Northwest Iowa.Plains Anthropologist38(145):283–206
  57. ^Shott, Michael J., Joseph A. Tiffany, John F. Doershuk, and Jason Titcomb (2002) The Reliability of Surface Assemblages: Recent Results from the Gillett Grove Site, Clay County, Iowa.Plains Anthropologist47:165–182
  58. ^Alex 2000;"Iowaville and the Lower des Moines River - Maps, Material Culture, and Memory: On the Trail of the Ioway - the University of Iowa Office of the State Archaeologist".Archived fromthe originalon 2008-05-05.Retrieved2008-06-03.
  59. ^Alex 2000:227
  60. ^McKusick, Marshall B. (2009). "Fort Madison, 1808–1813". In William E. Whittaker (ed.).Frontier Forts of Iowa: Indians, Traders, and Soldiers, 1682–1862.Iowa City: University of Iowa Press. pp. 55–74.ISBN978-1-58729-831-8.Archived fromthe originalon 2009-08-05.Retrieved2009-09-09.
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  62. ^Whittaker, William E., ed. (2009).Frontier Forts of Iowa: Indians, Traders, and Soldiers, 1682–1862.Iowa City: University of Iowa Press.ISBN978-1-58729-831-8.Archived fromthe originalon 2009-08-05.Retrieved2009-09-09.
  63. ^Charlton, Thomas H., Cynthia O. Charlton, Stephen C. Lensink, and James A. Sartain (1988) Historical Archaeology at Plum Grove.Journal of the Iowa Archeological Society35: 39–69
  64. ^Whittaker, William E. (1999) Production of Animal Commodities at Plum Grove, Iowa City.Historical Archaeology33(4):44–57
  65. ^Gradwohl, David M., and Nancy M. Osborn (1984)Exploring Buried Buxton.Iowa State University Press, Ames, Iowa
  66. ^"The University of Iowa Office of the State Archaeologist: GCP – Bowen's Prairie Historic Archaeological District".Uiowa.edu. Archived fromthe originalon 2012-10-06.Retrieved2009-07-22.
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