Spatiotemporal dynamics of the Clovis–Folsom transition

Despite the importance of the Clovis–Folsom transition for understanding the history of western North America, its spatiotemporal dynamics remains unclear. Here we report a three-part study in which we investigated the transition using radiocarbon dates from Clovis and Folsom sites. In the first part of the study, we used dates from Folsom site-phases to determine when and where Folsom originated. In the second part of the study, we employed Clovis and Folsom dates in analyses designed to determine whether Folsom spread via demic diffusion or cultural diffusion. In the third part of the study we investigated the velocity of the Clovis–Folsom transition. The analyses suggest that Folsom first appeared around 12,800 calBP in the northern High Plains and spread north and south from there. They also suggest that the spread of Folsom was, at least in part, the result of population expansion. In addition, the analyses indicate that the spread of Folsom was relatively fast for a prehistoric diffusion but well below the maximum velocity that has been estimated for such events. These findings, in turn, have implications for the hypotheses that have been put forward to explain the Clovis–Folsom transition. They refute the idea that the Clovis–Folsom transition resulted from an extraterrestrial impact over northern North America at 12,900 ± 100 calBP but are consistent with the alternative proposal that the transition was a response to climate-driven environmental change.     

Book reviews

Australian Politics

J.M. Baxter, M. Emmison and J. Western, Class Analysis and Contemporary Australia (Melbourne: Macmillan, 1991) pp.xiii + 394. $29.95 ISBN 0 7329 0335 1.

Clive Bean, Ian McAllister and John Warhurst (eds.), The Greening of Australian Politics: The 1990 Federal Election (Melbourne: Longman Cheshire, 1990) pp.xvi + 229. $22.99. ISBN 0 582 87031 3.

Peter Cullen, with an introduction by Clem Lloyd, No is Not an Answer: Lobbying for Success (Sydney: Allen and Unwin, 1991) pp.vii + 166. $19.95 ISBN 0 04 442294 6.

Peter Sekuless, Lobbying Canberra in the Nineties: The Government Relations Game (Sydney: Allen and Unwin, 1991) pp.vii + 165. $19.95 ISBN 0 04 442303 9.

Hugh V. Emy and Owen E. Hughes, Australian Politics: Realities in Conflict, Second Edition, (Melbourne: Macmillan, 1991) pp.ix + 577. $34.95 ISBN 0 7329 0392 0.

Brian Galligan, J.R. Nethercote and Cliff Walsh (eds.), The Cabinet and Budget Processes (Canberra: ANU, 1990) pp.141. $n.p. ISBN 0 7315 08815.

Adam Jamrozik, Class, Inequality and the State (Melbourne: Macmillan, 1991) pp.xx + 348. $29.95 ISBN 0 7329 0245 2.

Bruce Muirden, The Diggers Who Signed on For More: Australia's Part in the Russian Wars of Intervention, 1918–1919 (Adelaide: Wakefield Press, 1990) pp.115. $14.95 ISBN 1 86254 260 0.

Hugh Smith (ed.), Australia and Peacekeeping (Canberra: Australian Defence Studies Centre, 1990) pp.viii + 137.$10.00 ISBN 0 7317 0129 1.

David Wells, In Defence of the Common Wealth: Reflections on Australian Politics (Melbourne: Longman Cheshire, 1990) pp.126. $14.99. ISBN 0 582 86913 7.

Kenneth Wiltshire, Tenterfield Revisited: Reforming Australia's System of Government for 2001 (Brisbane: University of Queensland Press, 1991) pp.47. $9.95 ISBN 0 7022 2349 2.

Comparative and International Politics

Adam Ashforth, The Politics of Official Discourse in Twentieth‐Century South Africa (Oxford: Oxford University Press, 1990) pp.xiv + 296. $120.00 ISBN 019 827702 4.

Stefano Bartolini and Peter Mair, Identity, Competition and Electoral Availability: The Stabilization of European Electorates, 1885–1985 (Cambridge: Cambridge University Press, 1990) pp.xix + 363. £45.00/$US59.50 ISBN 0 521 38292 0.

Gerard Braunthal, Political Loyalty and Public Service in West Germany (Amherst: University of Massachusetts Press, 1990) pp.xvi + 249. $27.50 ISBN 0 87023 707 1.

Grant Evans and Kelvin Rowley, Red Brotherhood At War (revised edition) (London: Verso, 1990) pp.xxii + 322. $29.95 ISBN 0 86091 501 8.

Ron Eyerman and Andrew Jamison, Social Movements: A Cognitive Approach (Cambridge: Polity Press, 1991) pp.184. $29.95 ISBN 0 7456 08671.

Brian Head and Elaine McCoy (eds.), Deregulation or Better Regulation? (Melbourne: Macmillan, 1991) pp.vii + 183. $24.95 ISBN 0 7329 0563 X.

Ewan Jamieson, Friend or Ally (Sydney: Permagon Press, 1990) pp.x + 139. $19.95 ISBN 0 08 040081 7.

Boris Kagarlitsky (Translator, Rick Simon), The Dialectic of Change (London and New York: Verso, 1990) pp.xi + 393. $29.95 ISBN 0 86091 973 0.

Samuel Kernell (ed.) Parallel Politics: Economic Policymaking in Japan and the United States (Tokyo: Japan Center for International Exchange, and Washington: The Brookings Institution, 1991) pp.xiii + 390. $US36.95 ISBN 0 8157 4892 2.

Chandran Kukathas, David W. Lovell and William Maley (eds.), The Transition From Socialism: State and Civil Society in the USSR (Melbourne: Longman Cheshire, 1991) pp.viii + 227. $24.99 ISBN 0 582 87046 1.

James Minchin, No Man Is An Island: A Portrait of Singapore's Lee Kuan Yew (Sydney: Allen & Unwin, 1990). pp.407. $17.95 ISBN 0 04 4000028.

Chris Moore and J.J. Richardson, in association with Jeremy Moon, Local Partnership and the Unemployment Crisis in Britain (London: Unwin Hyman, 1989) pp.163. $n.p. ISBN 0 04 352220 3.

Neil Nevitte and Roger Gibbins, New Elites in Old States: Ideologies in the Anglo‐American Democracies (Toronto: Oxford University Press, 1990) pp.xi + 209. $24.95 ISBN 0 19 540803 9.

Philip Norton (ed.), Legislatures (Oxford: Oxford University Press, 1990) pp.xi + 336. $28.95 ISBN 019 8275811.

Amin Saikal and William Maley, Regime Change in Afghanistan: Foreign Intervention and the Politics of Legitimacy (Bathurst, Australia: Crawford House Press, 1991).pp.viii + 190. $37.50 ISBN 1 86333 029 1.

Alan Tapper, The Family in the Welfare State (Sydney: Allen and Unwin in association with the Australian Institute of Public Policy) pp.x + 284. $17.95 ISBN 0 04 442309.

Elise K.Tipton, The Japanese Police State: Tokko in Interwar Japan (Sydney: Allen & Unwin 1991) pp.vii + 209. $24.95 ISBN 004 442258 X.

Wang Jiye and Terence H. Hull (eds.), Population and Development Planning in China (Sydney: Allen & Unwin, 1991) pp.xx + 311. $24.95 ISBN 0 04 442323 3.

Political Theory and Methodology

John Dunn: Interpreting Political Responsibility: Essays 1981–1989 (Cambridge: Polity Press, 1990), pp. vii + 274. $32.95 ISBN 0 7456 0828 0.

David Held (ed.), Political Theory Today (Cambridge: Polity Press, 1991) pp.ix + 360. £12.50 ISBN 0 7456 0856 6.

Fredric Jameson, Late Marxism: Adorno, or, The Persistence of the Dialectic (London: Verso, 1990) pp.x + 270. $29.95 ISBN 0 86091 981 1.

Eugene Kamenka, Bureaucracy (Oxford: Basil Blackwell, 1989) pp.ix + 192. $24.95 ISBN 0 631 14579 6.

Ernesto Laclau, New Reflections on the Revolution of Our Time (London: Verso, 1990) pp.xvi + 263. $34.95 ISBN 0–86091–919–6.

Alan Moran, Andrew Chisholm and Michael Porter (eds.), Markets, Resources and the Environment (Sydney: Allen and Unwin in association with National Priorities Project, Tasman Institute, Melbourne, 1991) pp.ix + 290. $19.95 ISBN 1 86373 025 7.

Joseph Raz (ed.), Authority (Oxford: Basil Blackwell, 1990) pp.330. $34.95 ISBN 0 631 15944 4.

Ian Shapiro, Political Criticism (Berkeley: University of California Press, 1990) pp.xii + 338. $n.p. ISBN 0 520 06672 3.

David West, Authenticity and Empowerment (London: Harvester Wheatsheaf, 1990) pp.xv + 198. $n.p. ISBN 0 7450 0516.

Jonathan Wolff, Robert Nozick: Property, Justice and the Minimal State (Cambridge: Polity Press, 1991) pp.168. $29.95 ISBN 0 7456 0603 2.     

Recent Advances in Maya Archaeology

This paper focuses on the discoveries of the last decade in Maya archaeology, and assesses their impact on previous models and synthetic frameworks. Although the bibliography includes 700 items published during the last 10 years, it is not exhaustive; on the contrary, a frustratingly large number of discoveries had to be omitted. Two areas exploding with new research are (1) the elicitation of a greater variety of data from hieroglyphic texts, and (2) a series of chemical and biological breakthroughs in the analysis of human burials. The former make it easier to assess the role of elite actors or agents in processes of sociopolitical change. The latter hold out the hope of documenting warfare (through skeletal trauma), migration (by tracing tooth enamel isotopes to ground water), status or gender differences in diet (through bone chemistry), and biological connections of individuals to each other and to earlier populations (through DNA). By combining these new data, we are on our way to integrating humanism and science, and to treating Maya polities as case studies in primary or secondary state formation.     

我国城市社会空间结构特征及其演变趋势

城市社会空间结构是城市社会分化在地域空间上的表现.本文在介绍西方城市社会空间一般规律的基础上,分析研究了我国城市社会空间独有的结构特征及其形成机制,并结合我国城市社会经济状况的变化,对我国城市社会空间结构的演变趋势进行了探讨.     

基于分层聚类的旅游目的地营销系统研究

旅游目的地营销系统是一个重要的研究领域。利用1068份长沙市居民的有效问卷,针对湖南省内的景区景点、信息渠道和出游方式进行分层聚类,发现在长沙居民心目中,湖南省各景点存在7大类型。就各类型目的地现实客源市场的行为特征进行了探讨,针对各类型总结了不同的信息渠道、销售渠道,给出了不同的营销建议,并归纳出各旅游目的地在空间距离上形成的市民观光减压活动圈、城市商务/会议活动圈、猎奇探秘活动圈。     

A comment on Steele’s (2010) “radiocarbon dates as data: quantitative strategies for estimating colonization front speeds and event densities”

We show that Steele’s (2010) criticisms of Hamilton and Buchanan (2007) and Buchanan et al. (2008) do not hold water and demonstrate that his re-analyses of Hamilton and Buchanan’s (2007) and Buchanan et al'.s (2008) datasets are flawed. In the process, we highlight some important issues for researchers interested in using radiocarbon dates to reconstruct population movements and demography. Most notably, we explain why OLS regression is preferable to RMA regression when estimating diffusion velocity, and demonstrate that the summed probability distributions yielded by CalPal are more reliable as guides to past demographic change than those produced by Calib and OxCal.