Geological Events and Their Signif icance in the Subdivision and Correlation of the Continental Jurassic in Northwest China

Fu Junhui

On the basis of detailed investigation of large quantity of geology sections, the geological event srecorded in the continental Jurassic strata in Northwest China have been systematically studied in this paper. The index bed of the subdivsion and correlation of continental Jurassic are established according to the distribution of coal-bearing rocks, lithologic and sedimentary characteristics and sporo-pollen flora assemblage characteristics, as well as bivalve fossil association features. The forming mechanism of bioevents and cyclic sedimentary bed is due to the change of palaeoclimate and palaeoenvironment effect during that period. The existance of one temperature-rising event is extraordinarily evident during late middle to late Jurassic.

Department of Geology, Northwest University, Xi'an 710069

Received Date: 1997-05-25

Rev Recd Date: 1997-08-07

Publish Date: 1998-12-10

Key words:

northwest China /
continental Jurassic /
geological event /
stratigraphical subdivision and correlation /
index beds

Abstract: On the basis of detailed investigation of large quantity of geology sections, the geological event srecorded in the continental Jurassic strata in Northwest China have been systematically studied in this paper. The index bed of the subdivsion and correlation of continental Jurassic are established according to the distribution of coal-bearing rocks, lithologic and sedimentary characteristics and sporo-pollen flora assemblage characteristics, as well as bivalve fossil association features. The forming mechanism of bioevents and cyclic sedimentary bed is due to the change of palaeoclimate and palaeoenvironment effect during that period. The existance of one temperature-rising event is extraordinarily evident during late middle to late Jurassic.

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Geological Events and Their Signif icance in the Subdivision and Correlation of the Continental Jurassic in Northwest China

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