By using different kinds of data from sedimentology，biatomic and sequence stratigraphy and coal geology，sedimentary characteristics of the Tongziyan Formation and its evolutionary history are studied. The result indicated that the Tongziyan Formation are deposited in a marineshore environment. Its sedimentary sequence can be divided into three cycles，while each cycle starts with a rapid ingression and ends in a slow regression process due to a series of secondary fast transgression or regression events. Under the internatively influence of tidal and fluvial systems，the peat formation environments of Tongziyan Formation fluctuated constantly from fluvial to tidal flat. The sedimentary facies of the Tongziyan Formation include sea shore，islandlagoon，peat，tidal flat，tide or river controlled delta，which constitute a complex delta deposition system.
. Depositional environment of the Tongziyan Formation
of Dinfengshan coal mine in Longyong coalfield|
Fujian Province and its evolutionary characteristics
[J]. Chinese Journal of Geology, 2010, 45(01): 324-332.