Liushan and Mashiping Basins are located in Western Henan Frovince

North Qinling Belt.Their basements are Precambrian-Lower Paleozoie rocks

and the covering series are Upper Triassic

Upper Jurassic-Lower Cretaceous respectively.Liushan Basin is a complex syncline composed of two syncline and an anticline belts.The major faults are NWW-strike thrusts which do not control the distribution of strata.A complex syncline was also identified in Mashiping Basin.Its axis trend varied from NWW to NE-NNE direction

and was cut by boundary fault of the basin;its eastern section was almost completely destroyed by a southward thrust.The Meso-Cenozoic tec-tonic evolution can be divided into seven stages:regional uplift period(ANT

3

);depression period after regional uplift(T

3

);compresso-uplift period(J

1+2

);fault-subsidence period in tenso-shear condition(J

3

+K

1

1

);overthrust-nappe period(K

1

2

);extensional fault-subsidence period(K

2

+E?)and regional compresso-uplift period(N+Q).The prototype of Liushan Basin was a compressional basin

and that of Mashiping was an extensional one.Both of them were reformed by large scale southward overthrust-wrenching during late Yenshanian movement and became compresso-shear basins during the continent-continental collision between Yangtze and North China Plates.