Optically stimulated luminescence dating of the city wall system of ancient Tayma (NW Saudi Arabia)

In addition to a series of chronological markers (artefacts, pottery) in the archaeological contexts of ancient Tayma (NW Saudi Arabia), optically stimulated luminescence (OSL) and radiocarbon dating techniques were applied to generate reliable ages for the city wall system of the oasis. A massive aeolian sand deposit burying the oldest part of the outer wall of Tayma was sampled to obtain a minimum age for the construction of this wall. The sequence of OSL ages from the inactive dune (ID) (4900 ± 300 a, 5100 ± 400 a, 4400 ± 300 a, 3900 ± 200 a, 4000 ± 200 a) is in full accordance with ¹⁴C-AMS ages of charcoal embedded into the same dune (4190–4420 cal BP, 3870–4080 cal BP). Underlying alluvial samples from the inactive gravel sheet (IGS) in contrast give maximum ages for the construction which scatter between 6600 ± 300 a and 4900 ± 400 a. The new dating sequence provides evidence that the oldest part of the ancient city wall system already existed in the 2nd half of the 3rd mill. BC which is earlier than expected thus far from archaeological and architectural interpretation.     

Excavation of a pre-Conquest Cemetery at Addingham,West Yorkshire

EXCAVATIONS at Addingham in Wharfedale uncovered part of a cemetery which, on the evidence of radiocarbon analysis, can be dated to the 8th to 10th centuries A.D. At that period Addingham was an estate of the archbishops of York, and it was to here that Archbishop Wulfhere fled in 867 to escape the Danes. A total of 55 graves were investigated, yielding the remains of perhaps 80 individuals. Of these, about 40 wert undisturbed primary interments; the rest had been reburied in whole or part, leaving some graves empty and others containing several individuals. Later features included a ditch and a drying kiln which belonged to a post-Conquest manorial complex. Further details on the layout and components of the settlement have been gleaned from earthwork survey, geophysical prospection and documentary research, as well as from earlier excavations which until now remained unpublished.     

An additional basal sauropodomorph specimen from the Upper Triassic Caturrita Formation,southern Brazil,with comments on the biogeography of plateosaurids

Bittencourt, J.S., Leal, L.A., Langer, M.C. & Azevedo, S.A.K., June 2012. An additional basal sauropodomorph specimen from theUpperTriassic Caturrita Formation, southern Brazil, with comments on the biogeography of plateosaurids. Alcheringa, 1–10. ISSN0311-5518.

We describe an additional saurischian specimen from the Caturrita Formation (Norian) of the Parana Basin, southern Brazil. This material was collected in the 1950s and remained unstudied due to its fragmentary condition. Detailed comparisons with other saurischians worldwide reveal that some characters of the ilium, including the low ventral projection of the medial wall of the acetabulum and its concave ventral margin, together with the short triangular shape of the pre-acetabular process and its mound-like dorsocaudal edge, resemble those of sauropodomorphs such as Plateosaurus and Riojasaurus. This set of traits suggests that MN 1326-V has affinities with basal Sauropodomorpha, probably closer to plateosaurians than to Saturnalia-like taxa. Previous records of this clade in the Caturrita Formation include Unaysaurus, which has been related to Plateosaurus within Plateosauridae. Alternative schemes suggest that plateosaurids include Plateosaurus plus the Argentinean ‘prosauropods’ Coloradisaurus and Riojasaurus. Both hypotheses raise biogeographic questions, as a close relationship between faunas from South America and Europe excluding Africa and North America is not supported by geological and biostratigraphical evidence. Additionally, the absence of plateosaurids in other continents suggests that the geographical distribution of thistaxon is inconsistent with the geological history of western Pangaea, and this demands further investigations of the phylogeny of sauropodomorphs or improved sampling.

J.S. Bittencourt* [sigmaorionis@yahoo.com.br] Laboratório de Paleontologia, Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes 3900, 1404901, Ribeirão Preto, SP, Brazil. Fellow FAPESP; L.A. Leal, Departamento de Ciências Biológicas, Universidade Estadual do Sudoeste da Bahia, Rua José Moreira Sobrinho, s/n, 45206-190, Jequié, BA, Brazil; M.C. Langer, Laboratório de Paleontologia, Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes 3900, 1404901, Ribeirão Preto, SP, Brazil; S.A.K. Azevedo, Laboratório de Processamento de Imagem Digital, Departamento de Geologia e Paleontologia, Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista s/n, 20940-040, Rio de Janeiro, RJ, Brazil. Received 29.7.2011; revised 10.10.2011; accepted 18.10.2011.     

骑兵建设推动养马业的发展--战马马源之分析

战马是有条件的:它应当是乘用型的、适龄的骟马.战马质量关系到骑兵安全乃至战争胜负,战马数量和质量制约军政势力的消涨.在军事活动中战马的损耗量特大,要想保持强大的骑兵力量,必须随时补充战马.为此,人们努力拓宽战马马源,但从根本上解决马源问题,还在于发展养马业.骑兵建设从多方面推动养马业发展,这是骑兵史研究中一个重要问题.     

印度民族政策初探

印度民族政策的核心是“一个国家,一个民族”。本文认为,这是对欧洲“民族一国家”理论的歧解和误读,其防止国家分裂和增强国家凝聚力的用心可以理解,但结果却并不利于国民团结的增强和各种矛盾的缓和。这一政策的实质是民族压迫和民族同化。