Many bivalve-fossils were buried in the suit of sediments.The most abundant fossils were buried in the bottom of the suit of sediments, imbedded in the rocks with shell form and mineralized evidently.

• 这套沉积岩系产有丰富的双壳类化石，这套岩系底部与火山岩接触的层位，其所含的双壳类化石类别单一，个体较大，数量丰富，呈介壳形式产出，矿化明显。