Pre-Columbian Ring Ditches along the Yacuma and Rapulo Rivers,Beni, Bolivia: A Preliminary Review

Abstract

Pre-Columbian farmers built a variety of earthworks in the Llanos de Mojos, part of the Bolivian Amazon. Raised fields, canals, causeways, and mounds of various types in this region date to ca. 800 B.C.–A.D. 1600. In central Mojos, archaeological work was carried out along the Yacuma, a large west-bank tributary of the Mamoré River. Four ring ditches and two areas of associated raised agricultural fields were mapped. The Global Positioning System was used to document earthworks under the forest canopy which were analyzed within a Geographic Information System. Ceramic evidence is also included. The ring ditches in this study expand the known range of such earthworks in Mojos by 200 km. This revised distribution of ring ditches changes interpretations of the long-term history of Arawak speakers in Mojos and throughout Amazonia. While earthworks in Mojos clearly represent systems of intensive agriculture, they cannot be associated only with Arawak speakers or with Arawak languages.     

Survivorship of Earthworks Mapped by T. H. Lewis in Iowa 1884–1894

ABSTRACT

Between 1884 and 1894, Theodore Hayes Lewis mapped 370 prehistoric American Indian mounds and earthworks in Iowa as part of a larger survey of mounds in the upper Midwest. Georeferencing remapped Lewis survey notes allows their comparison with modern GIS data including lidar topographic maps, aerial photos, and land records. Of the 370 mounds, 190 (51.4%) are clearly visible in lidar, 160 (43.2%) are probably destroyed, and 20 (5.4%) are undetermined. Data analyses explore the factors that influenced mound survivorship. By far the strongest correlations for survivorship are modern land use, modern ownership, and local landform, with mounds most likely to survive in wooded areas, on public land, and on islands. Iowa data are compared with Lewis map data from Minnesota, revealing Iowa has a far higher survivorship, 51.4% versus 25.6%, likely attributable to land use in the late nineteenth century. Further comparison with Minnesota data suggests perhaps twice as many mounds stood in modern agricultural fields of Iowa before Lewis made his surveys.     

The ritual dugong bone mounds of Koey Ngurtai,Torres Strait,Australia: Investigating their construction

The islands of Western Torres Strait, between Papua New Guinea and Australia, saw the emergence of ritual dugong bone mounds approximately 400 years ago. These mounds were used as a means to commune with, and as an aid for the hunting of, dugongs. This paper explores the bone contents of three dugong bone mounds on the small, uninhabited island of Koey Ngurtai as a means to determine their construction and in doing so to explore the historical emergence of ritual bone mounds associated with dugong hunting magic—and thereby to historicise ethnographically known cultural practices—in Torres Strait. Copyright © 2009 John Wiley & Sons, Ltd.     

Excavations and Survey at Bryn Cysegrfan,Llanfair Clydogau,Dyfed, 1979

THE EARTHWORKS of a group of pillow mounds in association with four buildings were surveyed and partially excavated during 1978 and 1979 in advance of destruction. Below the earthen mounds, on the former ground surface, were alignments of flat stones found to cover a network of artificial burrows for rabbits. A single radiocarbon date from burnt vegetation beneath one mound provided a date of a.d. 1375±60. The buildings were also excavated and found to be of typical Welsh upland form.     

RECALCULATING MOUND VOLUME AT MOUNDVILLE

Abstract

Volume is a critical measure in quantifying differences among earthen mounds. Previous methods for measuring mound volume are prone to error by oversimplifying the symmetry of earthworks. However, the wide availability of contouring software has made it simpler to calculate volume. The results obtained using a computerized technique referred to as the gridding method are compared with previous mound volume estimates at Moundville. The outcome shows that volumes calculated using the gridding method are much smaller than the original estimates. Inflation of the volume of earthen mounds may lead to misrepresentations regarding the degree of sociopolitical organization that existed at Moundville and at other prehistoric mound-building societies in the southeastern United States.     

Poverty Point as Structure,Event, Process

A multiscalar analysis of the Poverty Point mound and ridge complex of northeast Louisiana illustrates the value of agency and practice theories to historical interpretations of monumental architecture. The architects of Poverty Point included both ancient mounds in their design and, arguably, symbolic representations of the far-flung places and peoples from which Poverty Point residents acquired raw materials for tools and ornaments. The conjunction of the past with the present, and the local with the nonlocal was the logic of a new social order that was both corporate and pluralistic. Extrapolation of the geometry of Poverty Point earthworks at increasingly larger scales encompasses the places and histories of communities whose migrations, shifting alliances, and transformations contributed to the genesis of Poverty Point culture.     

MAPPING NEVER-NEVER LAND: AN EXAMINATION OF PINSON MOUNDS CARTOGRAPHY

Abstract

The well-known map of the Pinson Mounds site published by William Myer in 1922 illustrates numerous earthworks, including 34 mounds and extensive embankments, most of which are not visible today. Researchers have long debated the existence of these features and the accuracy of Myer’s map in general. Using early photographs, topographic maps, gradiometry, and, most important, the 1917 field map upon which the 1922 map was based, it is clear that a number of the mapped features were not visible to Myer and were simply products of his imagination. Furthermore, we provide strong evidence that the Inner Citadel embankment and several associated mounds never existed.     

New radiometric dates for precolumbian (2000–700 b.p.) earthworks in western Amazonia,Brazil

Abstract

In this paper we present new data on the precolumbian geometric ditched enclosures identified in Acre State, western Amazonia, Brazil. Remote sensing and ground survey have revealed 281 earthworks, located mainly on the edges of high plateaus overlooking the river valleys drained by the southeastern tributaries of the Upper Purus River. Excavations have shown that the few existing cultural materials are concentrated on the slopes and in the bottoms of the ditches, as well as on small mounds that were likely remains of houses, whereas the central, flat enclosed areas lack major archaeological features. New radiocarbon dates place the initial stage of earthwork construction as early as ca. 2000 b.p. We suggest that the building of these geometric earthworks may have been a regionally shared phenomenon, especially among the Arawak and the Tacana peoples, who used them for special gatherings, religious activities, and, in some cases, as village sites.     

Natural degradation of earthworks,trenches, walls and moats,Northern Thailand

We here investigate the geometry, age, and history of several enigmatic northern Thailand earthwork entrenchments that are mostly located on hills and could not have held water to form moats. The earthworks are either oval or rectangular in plan view and typically encircle 0.3 to 1?sq km areas with no potsherd debris that would indicate former towns. Most trenches are 3–5?m deep with inner walls 4.5–8?m high. Some encircling earthworks are concentric double trenches spaced approximately 10?m apart. Historians have suggested these earthworks enclosed defensible areas where people in outlying villages sought refuge when under attack by neighboring rulers, the Chinese Ho, or the Burmese. We argue that some encircling entrenchments may have been for the capture or containment of elephants. Nearly all of the once near-vertical original walls have degraded to slopes of 32–47°. Fitting calculated curves of the diffusion-based scarp-degradation model to our height-slope data, and assuming most scarps have degraded since the end of La Na Kingdom time a.d. 1558, we derive a diffusion coefficient of 0.002?m² y^?1. Slopes of the rectangular earthwork at Souvannkhomkham, Laos, across the Mekong River from Chiang Saen Noi, are significantly more degraded (approximately 32°), indicating an age of 800–1200 years. Locations of these earthworks are established in hope that they will be preserved as part of the Thai and Lao archaeological legacy.     

The One Hundred and Forty-Third Report of the Council

In March 1991 and February—March 1993 a series of military training earthworks in Crowthorne Wood, near Bracknell, Berkshire, was surveyed by the Royal Commission on the Historical Monuments of England (R.C.H.M.E.) at the request of Berkshire County Council. The results of the survey and research into the earthworks' history have revealed a chronological depth reflecting the development in military earthworks from the Napoleonic Wars to the late nineteenth and twentieth century. The following account falls into two sections: the first describes remains which probably date from manoeuvres of 1792; and the second describes later trench systems. Each is preceded by an outline of the historical background to the remains.     

Assessing the contribution of integrated geoarchaeological approaches to understand the formation and function of burnt mounds: the example of Hoppenwood Bank,North Northumberland

Burnt mounds are detrital mounds of fire-cracked rock and charcoal, deposited as the result of a prehistoric process for heating water. They are the most numerous prehistoric monument found across Britain and Ireland and have traditionally been difficult to study due to their apparent homogeneity and lack of distinguishing features. This study seeks to change the discussion surrounding burnt mounds and evaluates a large early- to mid-Bronze Age burnt mound at Hoppenwood Bank in Northumberland using an integrated microarchaeological methodology, the contribution of which is assessed. A combination of micromorphology and silicic microfossil analyses indicates that these deposits are complex and multifaceted, showing variability in their depositional sequences, microcomponents, and taphonomy. The identification of hiatuses in deposition and desiccation of surfaces beneath the burnt mound indicate that the accumulation of material may have been periodic or seasonal, and dating suggests that sequential deposition may have spanned 500–700 years. Taphonomic issues identified at the microscale highlight concerns for the interpretation of microfossils. This paper considers the implications of these observations and argues that burnt mounds should be viewed as caches of environmental and sediment-based data, indicative of sequences within landscape use-patterns and human-environment interactions.     

Insights into Past Ritual Practice at Yikpabongo, Northern Region, Ghana

Varied interpretations have been provided for the figurine mound sites located in Koma Land and in the Mogduri District, Northern Region, Ghana, including that they represent burial mounds or shrines. In particular, the producers or affiliates of the mounds are unknown, as the traditions of the present inhabitants of the archaeological region dissociate themselves from the mounds. Current excavations of the mounds have provided considerable contextual information, leading the excavation team to hypothesise that the mounds are best understood within a shrine context and that the figurines, possibly representing ancestors or other beings, were used in ceremonies aimed at communicating with the supernatural world for healing or other purposes. This article presents the current understanding of these mound sites with particular reference to the 2010 and 2011 excavation seasons and the ethnography of existing groups in the area. Possible future avenues of enquiry are also discussed.     

Archaeomagnetic Dating of Pyrotechnological Contexts: a Case Study for Copper Smelting Sites in the Central Timna Valley,Israel

This study is focused on establishing age constraints for several copper slag deposits at the centre of the Timna Valley (Israel) via reconstruction of their ancient geomagnetic intensities as recorded by the individual slag samples at the time of their formation. The results show a correlation between the location of the slag deposits (labelled as individual ‘mounds’ in our survey) and their inferred ages, reflecting varying socio‐economic and political dynamics in the region. While the slag mounds found at the unprotected foothills represent a variety of dates (mostly Early Islamic), the slag mounds on the hilltops are chronologically constrained to the early Iron Age (late 11th to 10th centuries bce ), supporting the idea for a need for protection during this period. Furthermore, in comparing the new data with previous archaeomagnetic studies from Timna, we can assert the existence of simultaneous copper production at the archaeological Sites 30, 30a and 34. This gives further support to the claim of intense smelting in the central Timna Valley during the early Iron Age. Finally, this project demonstrates the potential of archaeomagnetic experiments to provide chronological insights, and their particular advantage in addressing pyrotechnology‐related cases.     

Mr. George Thomas Clark

The Bordesley Abbey Project has widened its horizons as it has developed, linking the core excavation of the abbey church with archaeological fieldwork, both in the outer court and beyond the precinct boundary on the abbey's granges, and with architectural and documentary research. Exceptional preservation is the key to Bordesley's importance—the survival of its precinct as a complete set of earthworks and of the unusually deep and complex stratification, yielding data and artefacts which are both very rich and extensive, and very well stratified, within a finely divided chronology. This review is a preliminary attempt to integrate the different elements, and to highlight the potential of the data now and for the future.     

Early Dilmun and its rulers: new evidence of the burial mounds of the elite and the development of social complexity,c. 2200–1750 BC

This paper deals with the social organisation of early Dilmun in Bahrain based on evidence from the burial mound record. Complete aerial photography survey and mapping have documented the extensive mound fields of Bahrain in their entirety and revealed a new and rare type of burial mound encircled by an outer ring wall. From the spatial distribution and appearance of these ‘ring mounds’ it is argued that they cover the time span 2200–1750 BC. It is further argued that the ring mounds reflect the entombment of a prominent segment of early Dilmun society and thus testify to the presence of a social elite as early as the late third millennium BC. The paper offers evidence supporting the view that fundamental changes in the size of the ring wall and the encircled mound occurred over time, culminating in the colossal ‘royal’ mounds near Aali village. The increase in size of the special mounds and the exclusive appearance of the type in the Aali cemetery after the emergence of ten concentrated cemeteries around 2050 BC are correlated with the already available evidence of increasing social complexity in Dilmun. Three clusters of ring mounds in Aali are argued to reflect the appearance of one or more ruling lineages that were ultimately to found the colony on Failaka, Kuwait, and rule not only Bahrain but also the adjacent coast of Saudi Arabia.     

Some Account of the Parish Church of Bakewell in Derbyshire,and of the Early Grave-Stones and Other Remains Discovered During the Recent Repairs

This report outlines the results of excavations carried out on the Stanwick earthworks in four different areas between 1981–86. At Forcett, area investigation recovered more of the structural plan of the north-western entrance investigated by Wheeler in 1951. Both here and in the Tofts, earlier deposits and features were recognized beneath the ramparts. Wheeler's idea that the Tofts settlement originated as a defended enclosure can no longer be sustained, and geophysical survey has indicated that its southern defences in fact follow a different line from that originally envisaged. Other excavations took place at Henah Hill, where a low bank underlies a long sequence of agricultural activity, itself sealed by the medieval ridge-and-furrow; and at Forcett Barns. The date and context of the earthworks are briefly reviewed in the light of the recent work at Stanwick. The main defensive earthworks were all probably constructed within a relatively short period around the mid first century A.D., when the long-lived settlement was at its most important.     

Illustrations of Medieval Manners,Chivalry, and Costume,from Original Documents

In 1994 investigations comprising geophysical and earthwork surveys, together with evaluation excavations were carried out at Hylton Castle, Sunderland. The results confirmed the former presence of buildings east of the gatehouse tower, and contemporary with it. Some evidence for a hitherto unknown sixteenth- or seventeenth- century successor to the castle was discovered on an artificial terrace overlooking the earthworks of an ornamental garden with associated water features.     

Pits,mounds, and vernal ponds in a Tasmanian subalpine grassland

Falling trees commonly turbate soils in primary forest, creating characteristic edaphic patterns related to pit and mound topography. Vernal ponds with associated mounds were observed in mineral soils on a treeless plain in subalpine Tasmania, Australia. The hypothesis that paired ponds and mounds on the plain originated as pit and mound features in forests that were later destroyed by fire was tested by comparing the soils and landforms caused by recent tree falls in adjacent forest with those on the plain. The soil characteristics, orientations, and dimensions of the ponds and mounds were consistent with a tree fall origin, although rare secondary ponds on the tops of mounds may derive from the burrowing activities of the medium‐sized marsupial, Vombatus ursinus (common wombat). The characteristics of pond and mound soils suggested that most were hundreds to thousands of years old, with the ponds persisting because of differences in deflation, deposition, and organic matter formation between themselves and adjacent persistently dry land.     

Automated mound detection using lidar and object-based image analysis in Beaufort County,South Carolina

The study of precontact anthropogenic mounded features—earthen mounds, shell heaps, and shell rings—in the American Southeast is stymied by the spotty distribution of systematic surveys across the region. Many extant, yet unidentified, archaeological mound features continue to evade detection due to the heavily forested canopies that occupy large areas of the region, making pedestrian surveys difficult and preventing aerial observation. Object-based image analysis (OBIA) is a tool for analyzing light and radar (lidar) data and offers an inexpensive opportunity to address this challenge. Using publicly available lidar data from Beaufort County, South Carolina, and an OBIA approach that incorporates morphometric classification and statistical template matching, we systematically identify over 160 previously undetected mound features. This result improves our overall knowledge of settlement patterns by providing systematic knowledge about past landscapes.