basal unconformity造句

"basal unconformity"是什么意思

造句与例句手机版

A conglomerate layer with well-rounded quartzite pebbles is present above the basal unconformity in some areas.
Those Pleistocene marine terraces are composed of clay, silt, sand and gravel with a basal unconformity of gravel on top of rock.
It's difficult to see basal unconformity in a sentence. 用basal unconformity造句挺难的

相邻词汇

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