- 责任者：Liu Li (School of the Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Guo Rongtao
- 刊名：Journal of Earth Sciences and Environment
- 出版年：2011
- 卷期：33(2)
- 关键词：碳酸盐岩 ; carbonate rocks ; 红藻门 ; Rhodophyta ; 蓝藻门 ; Cyanophyta
- 页码：p.137-141
- 图表：2 illus., 1 table, 32 refs.
- 分类号：0803
- issnNo：ISSN1672-6561
- isbnNo：CN61-1423/P
Based on the formers’ research results about the rhodoid and cyanoid, there is no suitable position for them in the previous classification of carbonate particle according to the observation of rock slice with microscope. In view of the genetic significance and reef-forming role, it is necessary to give rhodoid and cyanoid a definite concept and position individually. Coralgal is easily calcified, and the finally preserved coralgal detritus is classified as biodetritus; however, rhodoid was independent calcareous nodule composed by unattached coralgal, so that it could belong to the biodetritus. According to the origin and morphology of rhodoid and cyanoid, it is reasonable to classify rhodoid as bioclast and cyanoid as oncolite, and the new term cyanobacteria corallite is a substitute for cyanoid. The concept and classification of rhodoid and cyanoid could be more normative, and some important clues for the study on carbonate grains are also provided.