1. The gamma ray value of reef bafflestone is higher than those of sparrenite and sparrudite , and lower than those of micritic limestone , wackstone , echinoderm grainstone and marlstone.
   礁灰岩的自然伽马值高于亮晶砂、砾屑灰岩，而低于泥晶灰岩、棘屑灰岩、泥晶生屑灰岩、泥灰岩的放射性。

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