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Eastern Alps may have been ice-free in the time of Ötzi the Iceman 新闻
来源平台:NewScientist. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:18/0  |  提交时间:2020/12/22
Phasing of millennial-scale climate variability in the Pacific and Atlantic Oceans 期刊论文
Science, 2020
作者:  Maureen H. Walczak;  Alan C. Mix;  Ellen A. Cowan;  Stewart Fallon;  L. Keith Fifield;  Jay R. Alder;  Jianghui Du;  Brian Haley;  Tim Hobern;  June Padman;  Summer K. Praetorius;  Andreas Schmittner;  Joseph S. Stoner;  Sarah D. Zellers
收藏  |  浏览/下载:11/0  |  提交时间:2020/11/09
Sixteen hundred years of increasing tree cover prior to modern deforestation in Southern Amazon and Central Brazilian savannas 期刊论文
Global Change Biology, 2020
作者:  Jamie L. Wright;  Barbara Bomfim;  Corrine I. Wong;  Ben H. Marimon‐;  ;  nior;  Beatriz S. Marimon;  Lucas C. R. Silva
收藏  |  浏览/下载:7/0  |  提交时间:2020/11/09
Agricultural acceleration of soil carbonate weathering 期刊论文
Global Change Biology, 2020
作者:  John H. Kim;  Esteban G. Jobbá;  gy;  Daniel D. Richter;  Susan E. Trumbore;  Robert B. Jackson
收藏  |  浏览/下载:21/0  |  提交时间:2020/08/09
Post‐fire carbon dynamics in the tropical peat swamp forests of Brunei reveal long‐term elevated CH4 flux 期刊论文
Global Change Biology, 2020
作者:  Massimo Lupascu;  Hasan Akhtar;  Thomas E. L. Smith;  Rahayu Sukmaria Sukri
收藏  |  浏览/下载:10/0  |  提交时间:2020/08/09
Plant carbon allocation drives turnover of old soil organic matter in permafrost tundra soils 期刊论文
Global Change Biology, 2020
作者:  Lorna E. Street;  Mark H. Garnett;  Jens‐;  Arne Subke;  Robert Baxter;  Joshua F. Dean;  Philip A. Wookey
收藏  |  浏览/下载:8/0  |  提交时间:2020/06/22
Oldest Homo sapiens bones found in Europe 期刊论文
Science, 2020
作者:  Ann Gibbons
收藏  |  浏览/下载:10/0  |  提交时间:2020/05/20
Cahokia's rise parallels onset of corn agriculture 新闻
来源平台:EurekAlert. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:1/0  |  提交时间:2020/05/15
Monumental architecture at Aguada Fenix and the rise of Maya civilization 期刊论文
NATURE, 2020
作者:  Bedding, Timothy R.;  Murphy, Simon J.;  Hey, Daniel R.;  Huber, Daniel;  Li, Tanda;  Smalley, Barry;  Stello, Dennis;  White, Timothy R.;  Ball, Warrick H.;  Chaplin, William J.;  Colman, Isabel L.;  Fuller, Jim;  Gaidos, Eric;  Harbeck, Daniel R.;  Hermes, J. J.;  Holdsworth, Daniel L.;  Li, Gang;  Li, Yaguang;  Mann, Andrew W.;  Reese, Daniel R.;  Sekaran, Sanjay;  Yu, Jie;  Antoci, Victoria;  Bergmann, Christoph;  Brown, Timothy M.;  Howard, Andrew W.;  Ireland, Michael J.;  Isaacson, Howard;  Jenkins, Jon M.;  Kjeldsen, Hans;  McCully, Curtis;  Rabus, Markus;  Rains, Adam D.;  Ricker, George R.;  Tinney, Christopher G.;  Vanderspek, Roland K.
收藏  |  浏览/下载:30/0  |  提交时间:2020/07/03

Archaeologists have traditionally thought that the development of Maya civilization was gradual, assuming that small villages began to emerge during the Middle Preclassic period (1000-350 bc  dates are calibrated throughout) along with the use of ceramics and the adoption of sedentism(1). Recent finds of early ceremonial complexes are beginning to challenge this model. Here we describe an airborne lidar survey and excavations of the previously unknown site of Aguada Fenix (Tabasco, Mexico) with an artificial plateau, which measures 1,400 m in length and 10 to 15 m in height and has 9 causeways radiating out from it. We dated this construction to between 1000 and 800 bc using a Bayesian analysis of radiocarbon dates. To our knowledge, this is the oldest monumental construction ever found in the Maya area and the largest in the entire pre-Hispanic history of the region. Although the site exhibits some similarities to the earlier Olmec centre of San Lorenzo, the community of Aguada Fenix probably did not have marked social inequality comparable to that of San Lorenzo. Aguada Fenix and other ceremonial complexes of the same period suggest the importance of communal work in the initial development of Maya civilization.


Lidar survey of the Maya lowlands uncovers the monumental site of Aguada Fenix, which dates to around 1000-800 bc and points to the role of communal construction in the development of Maya civilization.