ISSN:0266-6979    

DOI:10.1111/j.1365-2451.1993.tb00960.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

ISSN:0266-6979    

DOI:10.1111/j.1365-2451.1993.tb00961.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

ISSN:0266-6979    

DOI:10.1111/j.1365-2451.1993.tb00962.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

ISSN:0266-6979    

DOI:10.1111/j.1365-2451.1993.tb00963.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

ISSN:0266-6979    

DOI:10.1111/j.1365-2451.1993.tb00966.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

Known coal reserves in China are about 1031 billion tonnes, while the predicted resources are 3800 billion tonnes. China is currently the world's largest coal producer, with over 1 billion tonnes’production in 1990. It is not surprising to discover, therefore, that coal is not only geographically widespread in the country but also occurs in every stratigraphic interval upwards from the Devonian (and even earlier) and is found in almost every conceivable depositional setting. With seams over 200 m thick in some basins, Chinese coals offer many geological as well as mining challenge

ISSN:0266-6979    

DOI:10.1111/j.1365-2451.1993.tb00969.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

The Aral Sea has become increasingly saline since 1960, resulting in decimation of the aquatic biota. Of the 11 ostracod species known to have been alive in the Aral Sea 30 years ago, only one, the euryhalineCyprideis torosa,lives there today. Recent research has suggested that this species has survived because it is capable of strong hypo–osmotic regulation. The Quaternary history of the sea shows that there have often been water–level fluctuations, but recent dramatic environmental changes have had particularly severe consequences on the ostracod fau

ISSN:0266-6979    

DOI:10.1111/j.1365-2451.1993.tb00970.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

ISSN:0266-6979    

DOI:10.1111/j.1365-2451.1993.tb00971.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

A holiday in Zimbabwe provided the opportunity to examine some of the rocks, many of Archaean age, in one of the geologically most interesting parts of the world. Here, a great deal of the Earth's geological history can be unravelled.

ISSN:0266-6979    

DOI:10.1111/j.1365-2451.1993.tb00972.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

Apart from its obvious attractions for the visiting tourist, Jamaica is geologically significant, with a rock record dating from the Cretaceous and occupying a position at the north–east end of the Nicaraguan Rise, adjacent to the North Caribbean Plate Boundary Zone. During the Cretaceous, Jamaica was part of an island arc, but since the Eocene the rock record has been dominated by limestone

ISSN:0266-6979    

DOI:10.1111/j.1365-2451.1993.tb00973.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY