lift of a valve

characters and its tectonic implication of basal conglomerate from gegongzhen formation in southern area of anhui province

皖南地区葛公镇组砾岩性质及其构造含义

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controlling technology of sealing for extremely-big water burst accidents in basal conglomerate water-containing seam

底砾含水层特大突水灾害的封盖治理技术

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Vertically, rocks near the unconformity appear layers which are in turn semi-weathering rock, weathering clay bed and basal conglomerate.

不整合附近的岩层在纵向上呈层分布：从下至上依次为半风化岩石、风化粘土层和底砾岩。

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and basal conglomerate spread on the unconformity interfaces.

不整合面上见有底砾岩。

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The oil-sand deposits in this region are mainly distributed in Cretaceous sandstone and basal conglomerate.

该地区油砂主要分布于白垩系砂岩、底砾岩中。

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According to the gravel composition, distribution, occurrence features and sedimentary features, the Silurian basal conglomerate in southern Guizhou may be classified according to its genesis into the storm event sedimentary type, tide channel lag type, karst collapse type and beach accumulation type.

依据底砾岩的砾石成份、分布和产出特征，以及沉积特点等，把贵州南部志留系的底砾岩分为风暴事件沉积型、潮道滞流型、岩溶垮塌型及海滩堆积型四种成因类型。

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Genetic types of Silurian basal conglomerate in Southern Guizhou

黔南志留系底砾岩成因类型

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