局限台地 指因浅滩遮挡,水体运动受限制的相对低洼的潮下地区,海水虽与广海相通,但循环受阻,水动力条件较弱,持续低能,盐度稍高,不利于广海生物发育,生物种类及丰度较低。主要岩石为泥晶灰岩、球粒泥晶灰岩、泥质条带泥晶灰岩、云斑泥晶灰岩及准同生白云岩等,其基本特点为缺乏高能颗粒,岩石中常见生物碎屑多为广盐性生物,可发育燧石结核。
碳酸盐台地沉积体系又可进一步分为局限台地、开阔台地、台地边缘礁滩及缓坡等沉积相。
The carbonate platform sedimentary system is further divided into such facies as restricted platform, open platform, platform margin reef and ramp.
提出了台地边缘生物礁相—局限海台地相模式。
The writer introduces the models of organic reef facies of platform margins and platform facies of barrier sea.
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