生物礁类型有塔礁、补丁礁、块礁、台地边缘礁、环礁。
Bioherm type comprises tower reef, patch reef, massive reef, platform-edge reef and atolls etc.
西汉水群出露于盆地的南部，以板岩、千枚岩及砂岩为主，夹灰岩块和生物礁；
The Xihanshui Group, which distributes in the southern of the basin, is mainly slates, phyllites and sandstones with carbonatite and reef blocks.
礁块的粘结岩成骨架中通常有大洞，是由于生物快速生成形成的。
Reefy boundstone or framework commonly contains large cavities formed through rapid organic growth.
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