Compared with gymnospermae pollen, the fern spore has a more closer relationship with soluble organism in the low-rank source rocks from the coal-bearing strata.

 
  • 而蕨类孢子和裸子植物花粉相比,可能对低熟-未熟油,特别是含非烃较高的低熟油有某种更为密切的联系。
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