关键词: 广西, 六景, 古近纪, 碳酸盐砾石, 冲积扇, 干旱气候

Abstract: In comparison with the modern and ancient alluvial fan analogues, the matrix-supported carbonatite boulders and pebbles discretely cropping out to the northeast of Liujing town in Guangxi province, where they unconformably overlie the Lower Devonian Moding and Najiao formations, were described and studied. These discrete red coarse deposits represent the remains of different parts of one Paleogene alluvial fan respectively rather than isolated Devonian collapse in carbonatite cave or other depositions presumed by some related scholars. Based on the causer analysis, the Paleogene alluvial fan is proposed as piedmont alluvial fan sourced by the carbonate hinterland under a dry climate.

Key words: Guangxi province, Liujing, Paleogene, carbonate conglomerate, alluvial fan, dry climate