单词	tillite
释义	tillite /ˈtɪlʌɪt / noun [mass noun] Geology Sedimentary rock composed of compacted glacial till.He warned that not all poorly sorted rocks were true glacial tillites and thus were unreliable indicators of past climate and continental positioning.... One of the classical Late Pre-Cambrian tillites is the Bigganjargga tillite of northern Norway. Both the tillite and the rock surface are demonstrably Pre-Cambrian.
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