A number of suites of Carboniferous, middle-lower Jurassic and lower Cretaceous hydrocarbon source rocks were developed in the basin groups in the Paleo-Asian and Tethyan structural confluence area.
古亚洲与特提斯构造交汇带盆地群发育石炭系、侏罗系（中下统）、白垩系（下统）等多套烃源岩，具有厚度大、分布广、有机质丰度高的特点。
It wasn’t long before we were facing the most dangerous part of the river, the confluence. This is the area where two rivers flow into one.
很快，我们来到河上最危险的一段——汇流处，这是两条河交汇的地方。
In this paper, the mechanism of runoff-producing and flow confluence in karst area, the structure function of karst hydrological conceptual model, and the problem of modelling process are discussed.
本文侧重讨论岩溶水循环中产流与汇流、岩溶区流域面积确定、地表水与地下水划分、以及解决这些问题的技术方法。
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