Alceu Ranzi
Universidade Federal do Acre
GeomorphologySedimentary depositional environmentGeologyLate MioceneAmazon rainforest
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Publications 19
#1Martti Pärssinen (UH: University of Helsinki)H-Index: 8
Last. Alceu Ranzi (UFAC: Universidade Federal do Acre)H-Index: 11
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Evidence from several earthwork-building societies has recently been discovered in Amazonia that challenges existing theories about precolonial, human-environment interactions. Combining data obtai...
#1José Iriarte (University of Exeter)H-Index: 29
#2Mark Robinson (University of Exeter)H-Index: 9
Last. Luiz E. O. C. Aragão (INPE: National Institute for Space Research)H-Index: 47
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Recent research has shown that the entire southern rim of Amazonia was inhabited by earth-building societies involving landscape engineering, landscape domestication and likely low-density urbanism during the Late Holocene. However, the scale, timing, and intensity of human settlement in this region remain unknown due to the dearth of archaeological work and the logistical difficulties associated with research in tropical forest environments. A case in point are the newly discovered Mound Villag...
#1Martti PärssinenH-Index: 8
#2Alceu RanziH-Index: 11
#1Denise Pahl Schaan (UFPA: Federal University of Pará)H-Index: 10
#2Míriam Aparecida Bueno (UFG: Universidade Federal de Goiás)H-Index: 2
Last. Ivandra RampanelliH-Index: 1
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Esse artigo dedica-se a examinar com detalhes a arquitetura monumental dos geoglifos, gigantescos espacos de sociabilidade que demarcavam lugares e disciplinavam deslocamentos na Amazonia Ocidental pre-colombiana. Esses lugares sao examinados sob a perspectiva da ecologia historica, a partir da qual se entende os fenomenos produzidos pela relacao dialetica entre sociedades humanas e meio ambiente e que resultam na formacao das paisagens como palimpsesto de eventos atraves de uma linha temporal. ...
5 CitationsSource
#1Denise Pahl Schaan (UFPA: Federal University of Pará)H-Index: 10
#2Martti Pärssinen (UH: University of Helsinki)H-Index: 8
Last. Jacó César PiccoliH-Index: 2
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Ecological differences between varzea and terra firme environments (agricultural land, access to riverine resources and navigation) have supported interpretations of terra firme peoples as semisedentary, slash-and-burn cultivators who never developed complex social institutions and elaborated material culture.This article aims to challenge this assumption by reporting the existence of hundreds of geometric earthen structures built by pre-Columbian populations in the clayed soils of occidental Am...
8 CitationsSource
#1Jennifer Watling (USP: University of São Paulo)H-Index: 9
#2José Iriarte (University of Exeter)H-Index: 29
Last. Alceu RanziH-Index: 11
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We welcome the debate opened by Piperno et al. (1) in response to our recent article (2), and thank the editors of PNAS for the opportunity to reply. Although acknowledging that we detected localized human impacts in our study area, Piperno et al. (1) downplay the increases in palms observed at the geoglyph sites, stating it’s “unclear” whether humans actively managed the forest in these locations. Independent of one’s opinion about intentionality, we argue that the rapid decline of palms after ...
7 CitationsSource
#1Jennifer Watling (USP: University of São Paulo)H-Index: 9
#2José Iriarte (University of Exeter)H-Index: 29
Last. Alceu RanziH-Index: 11
view all 10 authors...
Over 450 pre-Columbian (pre-AD 1492) geometric ditched enclosures (“geoglyphs”) occupy ∼13,000 km2 of Acre state, Brazil, representing a key discovery of Amazonian archaeology. These huge earthworks were concealed for centuries under terra firme (upland interfluvial) rainforest, directly challenging the “pristine” status of this ecosystem and its perceived vulnerability to human impacts. We reconstruct the environmental context of geoglyph construction and the nature, extent, and legacy of assoc...
45 CitationsSource
#1Jennifer WatlingH-Index: 9
#2José IriarteH-Index: 29
Last. Alceu RanziH-Index: 11
view all 5 authors...
#1Denise Pahl SchaanH-Index: 10
#2Martti PärssinenH-Index: 8
Last. Antonia BarbosaH-Index: 3
view all 6 authors...
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...
32 CitationsSource
#1Martti PärssinenH-Index: 8
#2Denise Pahl Schaan (UFPA: Federal University of Pará)H-Index: 10
Last. Alceu Ranzi (UFAC: Universidade Federal do Acre)H-Index: 11
view all 3 authors...
It’s an ill wind that blows nobody any good. The combination of land cleared of its rainforest for grazing and satellite survey have revealed a sophisticated pre-Columbian monument-building society in the upper Amazon Basin on the east side of the Andes. This hitherto unknown people constructed earthworks of precise geometric plan connected by straight orthogonal roads. Introducing us to this new civilisation, the authors show that the ‘geoglyph culture’ stretches over a region more than 250km a...
69 CitationsSource