沉积岩主要根据（ ）进行分类。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29436' and id < 2396647 and id<>'2396647' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29436' and id > 2396647 and id<>'2396647' order by id asc limit 5