alluvial fan

Arid fan takes the dominate place of alluvial fan, and particularize the humid fan developed in Yan' an Formation.

冲积扇以干旱扇为主，特别指出延安组发育湿地扇沉积。

During the initial stage of coal measures deposition, was mainly alluvial fan deposit, middle stage lake delta deposit and later stage lacustrine deposit. Most coal seams in Yanan Formation were formed in peaty moors on lake delta plain.

煤系沉积初期，以河流及冲积扇沉积为主，沉积中期则以湖泊三角洲沉积为主，晚期以湖泊环境为主，延安组各煤层大多是在湖泊三角洲平原上泥沼化形成的。

Structures and sedimentary environments of the alluvial fan of the Luan River

滦河冲积扇结构和沉积环境

Detailed sedimentary research indicates that Late Jurassic Mohe basin contains the alluvial fan, fan-delta and lacustrine facies, belonging to continental molasse deposits of the foreland basin.

详细的沉积学研究表明：晚侏罗世漠河盆地主要发育冲积扇、扇三角洲和湖泊相沉积，属于前陆盆地的陆相磨拉石部分。

The sedimentary facies types of the abrupt slope model include alluvial fan, fan delta, and so on. Moreover, the facies changed rapidly and the sorting of the rock is bad.

沉积相类型主要发育冲积扇、扇三角洲等沉积体系，并且相带变化快、岩石粒度分选差。

The middle member is the gravity slide collapse block and breccia facies-structural movement type alluvial fan facies sediments.

中段为重力滑塌岩块及角砾岩相-构造活动型冲积扇相沉积；

The main sedimentary system includes fluvial, delta, alluvial fan and lake facies.

主要沉积体系为河流 、 三角洲 、 冲积扇及滨浅湖相.

Upward-fining channels may occur in a wide range of environments, from submarine canyon to alluvial fan.

向上变细的水道可以出现在好多种环境中, 从海底峡谷到冲积扇.

Luohe formation mainly develops aeolian deposit, alluvial fan and braided deposit.

洛河组主要发育风成沉积、冲（洪）积扇、辫状河沉积；

The result indicates that the Palaeogene of this area belongs to faulted lake-basin sedimentary system. Mainly developed are fan-delta, deep lake turbidite and calcirudite deposit, and also alluvial fan deposit in early period.

结果认为：该区下第三系属于断陷湖盆沉积体系，主要发育有扇三角洲沉积、深湖浊流沉积和粒屑灰岩沉积，早期还发育冲积扇沉积；

In tectonic active stage, the early period of base level cycle, sediments accumulated quickly, and alluvial fan or braided stream was always developed, but their distribution area was limited.

在构造活动期，即在基准面旋回的早期，沉积物堆积速率快，往往发育冲积扇或者辫状河沉积，但是其分布范围局限。

These channels are most common near the apex of the alluvial fan body.

这些河道最常见于近冲积扇体的顶端.

Groundwater Vulnerability Assessment System in Alluvial Fan of Luanhe River

滦河冲洪积扇地下水脆弱性评价体系研究

In front of the middle segment of the mountain, there is Dashuigou alluvial fan with coarse sediment, moderate slope and less fan area.

中段的大水沟等四个扇体组成物质较粗，坡度较大，而面积较小。

The model shows that current of alluvial fan progressed in the direction of SEE along the short axle with steep slope, and its current energy can keep only in short distance.

该模式表明，对于水流能量保持能力差的冲积扇，其古流向应该沿短轴陡坡降方向，即大致为SEE方向；

The facies includes alluvial fan, fan-delta, offshore lake, shallow lake and deep lake facies.

沉积相类型包括:冲积扇相 、 扇三角洲相 、 滨湖相 、 浅湖相、深湖相.

Fan-topped pediment These channels are most common near the apex of the alluvial fan body.

这些河道最常见于近冲积扇体的顶端。

at first light, i started my trek up an alluvial fan into an unnamed canyon in the cottonwood mountains.

天刚亮，我就从一片冲积扇区（峡谷山口的扇形沉积物）处开始了旅程，进入了卡顿伍德山脉中的一个无名峡谷。

During the sedimentation period of Shawan Formation, there developed four types of sedimentary facies as gentle slope fan delta, shallow braided river delta, alluvial fan, coastal shallow-lake.

沙湾组沉积时期主要发育了缓坡型扇三角洲、浅水辫状河三角洲、冲积扇、滨浅湖滩坝等4种沉积相类型。

The sedimentary systems of lowstand system tracts include basin floor fan, slope fan, progradational wedge, delta, fan delta, alluvial fan, submarine valley and incised valley.

构成低位体系域的沉积体系主要有盆底扇、斜坡扇、前积楔、三角洲、扇三角洲、冲积扇、海底峡谷和下切谷等。

It can be concluded that clastic facies consisting of tidal facies, lagoon facies, Fluvial facies, alluvial fan facies and fan delta and carbonate facies including evaporation platform, restrict platform, open platform and ford of platform margin.

碎屑岩沉积相包括潮坪相、泻湖相、河流相、冲积扇相以及扇三角洲相：碳酸盐沉积相包括蒸发台地、局限台地、开阔台地和台地边缘浅滩。

Form the second to sixth member, the sediment of Xujiahe formation were basically continental deposit, which could be divided into alluvial fan, fan-delta, braided river delta and lakes facies.

须家河组二到六段基本上为陆相沉积，将其分为冲积扇、扇三角洲、辫状河三角洲和湖泊沉积相。

Dawukou alluvial fan, located at the north end of the study area, has fine sediments, big fan area, flat slope and typical morphology.

而且本地区冲积扇在发育上也存在着较大的差异：北段的大武口冲积扇物质组成较细，坡度较平缓，面积较大。