Message from the Editor-in-Chief

正Dear Authors and Readers:First of all,on behalf of the new Editorial Board,I would like to express our sincere appreciation for your continuing support of our journal.This journal,founded in 1922,is the oldest geological journal in China.As the flagship journal of the Geological Society of China,it has become more and more influential in earth sciences in China and beyond.The journal is now indexed by SCI,CA and more than 20 other databases,with an impact     

自动合闸装置在气象观测无人值守中的应用

地面气象观测无人值守业务改革后,基层台站普遍安装了专用供电变压器。电网停电后,变压器内部的断路保护器自动跳闸;再来电时,需要人工合闸,才能恢复供电,给工作带来很大不便。为此设计一款来电自动合闸装置,在断电后再来电时,能够模拟人工合闸的方式,自动恢复供电,进一步提高了地面气象观测无人值守业务供电的稳定性,也为其他有类似情况的台站提供一些参考。     

南宁地无慌

据有关人士透露,南宁市将采用"分批、分片"的方式,公开拍卖出让位于市区东部的南宁·中国-东盟国际商务核心区的833.6亩经营性用地.     

群众要我们这样做……——广西壮族自治区投资建设武呜县双桥镇土地整理示范项目侧记

2004年12月28日，随着武鸣县双桥镇土地整理示范项目的破土动工，揭开了广西土地开发整理工作由全面开垦转向全面整理的历史序幕。     

中国非海相晚中生代介形虫、孢粉生物地层

中国中生代晚期以非海相沉积为主要特征,并产有极其丰富的介形虫及微体植物。就其类型,垂直变化及其演替关系,自侏罗纪中期至自垩纪晚期可分为五个化石组合:     

GENETIC DIVERSITY OF THE WILD AND REARED PSEUDOSCIAENA CROCEA

The genetic diversity of both wild and reared Pseudosciaena crocea (Richardson) col-lected from Guan-Jing-Yang in Ningde, China in May 1999 was investigated by random amplified poly-morphic DNA (RAPD) in the present study. The polymorphism and mean difference of the wild popula-tion as revealed by RAPD were 18.9% and 0.0960 respectively, and those of the reared stocks were rel-atively lower, with 16.7% in polymorphism and 0.0747 in mean difference. The genetic distance be-tween the two stocks was 0.0041. From the comprehensive investigation, the main reasons for the loss of genetic diversity were probably overilshing, small number of parents as broodstocks and the debatable arti-ficial ranching. Results from this study also showed that the large yellow croaker populations distributed along Fujian coastal waters including Guan-Jing-Yang still potentially wide genetic variability. It is sug-gested that genetic management and prevention should be scientifically conducted in order to maintain and improve the genetic diversity of the P. crocea population.