Geophysical investigations of the tectonic boundary between East and west antarctica

The Transantarctic Mountains (TAM), which separate the West Antarctic rift system from the stable shield of East Antarctica, are the largest mountains developed adjacent to a rift. The cause of uplift of mountains bordering rifts is poorly understood. One notion based on observations of troughs next to many uplifted blocks is that isostatic rebound produces a coeval uplift and subsidence. The results of an over-snow seismic experiment in Antarctica do not show evidence for a trough next to the TAM but indicate the extension of rifted mantle lithosphere under the TAM. Furthermore, stretching preceded the initiation of uplift, which suggests thermal buoyancy as the cause for uplift.     

在西部开发中怎样搞好推广工作

农机化技术推广是实现农业现代化的关键.在市场经济条件下,西部大开发中,农机化技术推广工作又包含了新的内容,怎样在新的形势下,搞好农机推广工作,谈谈自己的几点意见:     

西部农民创业问题发展探讨

农民创业是实现农民增收、解决农村剩余劳动力、完成新农村建设的有效途径,也是农民由＂输血＂到＂造血＂,实现长效发展的必有之路。笔者首先分析了西部农村创业现状以及农民创业面临的主要问题,其次论述了西部农民创业与农村经济发展的关系,最后探讨了西部农民如何通过创业来带动经济发展。     

Last of the west ford dipoles

Radar measurements confirm that the several hundred million individually orbiting West Ford dipoles reentered the lower atmosphere in precise accord with predictions. Calculations indicate that these tiny copper wires survived reentry and floated gently back to Earth; unfortunately,the probability of finding one is minuscule. Some dipole clusters remain in orbit but almost all should return to Earth within the next 2 years.     

Early cambrian foraminifera from west Africa

Agglutinated foraminifera have been recovered from siltstones in the Walidiala Valley, Taoudeni Basin, West Africa. Associated faunas suggest an Early Cambrian age for these strata. These now earliest known unequivocal foraminifera help constrain hypotheses concerning the origin of skeletalization at the beginning of the Phanerozoic.     

Suggested revision for west mexican archeological sequences

A review of the radiocarbon dates and published and unpublished archeological data from the West Mexican states of Sinaloa, Nayarit, Jalisco, and Colima has resulted in a revised tentative chronology for West Mexico.     

夏西芹无公害栽培技术

芹菜一般情况下以保护地结合露地生产，基本上可以达到市场的周年供应。但因夏季温度高不易管理，常形成产量低、品质差等现象，经济效益较差。我们通过实验研究，总结出一套夏西芹无公害栽培技术。     

Changes in the west antarctic ice sheet

The portion of the West Antarctic ice sheet that flows into the Ross Sea is thinning in some places and thickening in others. These changes are not caused by any current climatic change, but by the combination of a delayed response to the end of the last global glacial cycle and an internal instability. The near-future impact of the ice sheet on global sea level is largely due to processes internal to the movement of the ice sheet, and not so much to the threat of a possible greenhouse warming. Thus the near-term future of the ice sheet is already determined. However, too little of the ice sheet has been surveyed to predict its overall future behavior.