• 1. graded bedding: 粒级层理 | 序粒层 | 粒级层 | 粒序层理
• 2. biogenic graded bedding: 生物粒级层 | 生物递变层理
• 3. content graded bedding: 含量递变层理

更多释义

• 1.Depositional beddings such as graded bedding, massive bedding, parallel bedding, cross-bedding and wave bedding, are well developed;
  粒序层理、块状层理、平行层理、交错层理、波状层理十分发育；
  dict.yoduao.com

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