- Thesedimentaryrocksaregraywacke,siltstone,tuffandpellitie,etc.StudyontheweatheringcharacteristicsofCretaceousargillaceoussiltstoneItsmainrocksisthemetamorphicpeliticsiltstone,thefeldspathicquartzwacke,thefinesandialfeldspathicquartzsiltstone,thefelds...
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