Sedimentary facies model for mixed sediments of recent reefoid carbonates and siliciclastics is developed from the facies model of fringing and barrier reefs. Based on the sedimentary facies and textures, mixed sediments may be subdivided into 5 types as follows: 1 reef base mixed sedimentary rocks and reef framework mixed sedimentary rocks; 2 reef flat sand-gravel mixed sedimentary rocks; 3 backreef beach-dune gravel-sand mixed sediments; 4 backreef lagoonal sand mixed sediments ; and 5 reef front littoral sand mixed sediments.

礁源與陸源混合沉積相模式是從岸礁一堡礁相模式基礎(chǔ)上發(fā)展而來(lái)国产一区二区青草久久，根據(jù)其沉積相和沉積結(jié)構(gòu)特徵可以分為5種混合沉積：①礁基混積巖和礁格架混積巖人人色人人操；②礁坪砂礫屑混積巖；③礁后海灘－沙提礫砂屑混合沉積操美女视频在线网站；④礁后瀉湖砂屑混合沉積天堂干屄免费视频；⑤礁前淺海砂屑混合沉積。

The Pennsylvanian strata contain abundant benthos fossoils, including kinds of reef-building organisms. These reef-building organisms built different reefs in which the main typs are Fomitchevella coral framework reefs, phylloid algae framework-barrier reefs, Ivanovia cf.

賓夕法尼亞亞紀(jì)地層中含有極為豐富的底棲生物化石www.日本在线播放，其中包括多種造礁生物并建造了不同類型的生物礁国产综合一区二区三区精品，主要礁體有：Fomitchevella珊瑚骨架礁、葉狀藻骨架－障積礁久久国内免费黄色、Ivanovia cf最新国产裸模视频视频在线。