51. The cower unit of the Eagle is a wellsorted lithic and glauconitic marine sandstone.

伊格尔砂的下部单元是分选良好的屑质海相海绿石质。

Houses in the area are built of sandstone.

这个地区的房屋都是用砂建的。

An aquifer is a water-bearing rock stratum such as sandstone and chalk.

地下蓄水层是一些有水的石层, 如白垩。

Made of arkosic sandstone, Uluru changes color in different lights, particularly at sunrise and sunset.

乌奴奴由长石砂成，不同的光线下会变色，落时分尤其变化万千。

They mainly consist of sandstone,in which quartzarenite and litharenite are dominant and arkose is lack.

碎屑以砂类为主，其中又以石英砂类屑砂类为主，缺少长石砂类。

But the reservoirs of coastwise bar, lacustrine bay sandstone and shore sand occur in each tract.

而沿岸坝、滩砂、湖湾砂等油气藏分布于各个体系域。

The platform foreslope is composed of the dark grey and celadon calcareous mudstone,siltstone,sandstone intercalated with limestone conglo...

内陆棚以深灰、灰绿色灰质泥夹浅灰色砂质、灰质纹层或条带为特征,并编制了该地区桑塔木的相古地理图。

Photo Gallery: Erosion and Weathering Wind erosion makes these layered sandstone hills swirl in Paria Canyon-Vermilion Cliffs Wilderness Area.

腐蚀风化图片集。风的侵蚀使这些层状砂丘陵漩涡的Paria峡谷――朱红悬崖的荒野地区。

Cold production has been successfully applied to the heavy oil recovery in uncemented sandstones taking as a new production technology.

冷采作为一种新的采油工艺,已成功地用于未胶结砂中的稠油开采。

A Qatari man in a traditional white dishdasha robe and a wind-blown red-and-white kaffiyeh stands before a sandstone formation near Dukhan.

一个身着传统白色长袍，头戴红白图案头巾的卡塔尔人站杜砍附近的的一座砂前面。

The lithologies are dominated by alternating sandstones, shales and limestone, and the sedimentary environment based on shoreland tidal flat with swamp developed in the lower.

性为砂、页-灰互层，沉积环境以滨岸潮坪为主，下部沼泽发育。

The sandstones of the Turpan Basin belong mostly to graywacke and their compositional and textural maturity are generally low,indicating a strong erosional and rapid transportational environment.

吐-哈盆地的砂主要属杂砂类，总的结构成熟度成分成熟度均较低，形成于强烈剥蚀、快速搬运的沉积环境中。

The middle oil-member is characterized by medium-sized sandstone and pebbled sandstone, with fair sorting and subangular sphaericity.Rock types mainly were feldspar debris sandstone.

中油主要沉积中砂含砾中砂，粒度整体较粗，分选性较好，磨圆度以次棱角状为主，石类型为长石屑砂。

51. The cower unit of the Eagle is a wellsorted lithic and glauconitic marine sandstone.

伊格尔砂岩的下部单元是分选良好的岩屑质和海相海绿石质。

Houses in the area are built of sandstone.

这个地区的房屋都是用砂岩建的。

An aquifer is a water-bearing rock stratum such as sandstone and chalk.

地下蓄水层是一些有水的岩石层, 如沙岩和白垩岩。

Made of arkosic sandstone, Uluru changes color in different lights, particularly at sunrise and sunset.

乌奴奴由长石砂岩成，在不同的光线下会变，在日出日落时分尤其变化万千。

They mainly consist of sandstone,in which quartzarenite and litharenite are dominant and arkose is lack.

碎屑岩以砂岩类为主，其中又以石英砂岩类和岩屑砂岩类为主，缺少长石砂岩类。

But the reservoirs of coastwise bar, lacustrine bay sandstone and shore sand occur in each tract.

而沿岸坝、滩砂、湖湾砂等油气藏分布于各个体系域。

The platform foreslope is composed of the dark grey and celadon calcareous mudstone,siltstone,sandstone intercalated with limestone conglo...

内陆棚以深、绿质泥岩夹砂质、质纹层或条带为特征,并编制了该地区桑塔木的岩相古地理图。

Photo Gallery: Erosion and Weathering Wind erosion makes these layered sandstone hills swirl in Paria Canyon-Vermilion Cliffs Wilderness Area.

腐蚀和风化图片集。风的侵蚀使这些层状砂岩丘陵漩涡的Paria峡谷――朱红悬崖的荒野地区。

Cold production has been successfully applied to the heavy oil recovery in uncemented sandstones taking as a new production technology.

冷采作为一种新的采油艺,已成功地用于未胶结砂岩中的稠油开采。

A Qatari man in a traditional white dishdasha robe and a wind-blown red-and-white kaffiyeh stands before a sandstone formation near Dukhan.

一个身着传统白长袍，头戴红白图案头巾的卡塔尔人站在杜砍附近的的一座砂岩前面。

The lithologies are dominated by alternating sandstones, shales and limestone, and the sedimentary environment based on shoreland tidal flat with swamp developed in the lower.

岩性为砂、页岩-岩互层，沉积环境以滨岸潮坪为主，下部沼泽发育。

The sandstones of the Turpan Basin belong mostly to graywacke and their compositional and textural maturity are generally low,indicating a strong erosional and rapid transportational environment.

吐-哈盆地的砂岩主要属杂砂岩类，总的结构成熟度和成分成熟度均较低，形成于强烈剥蚀、快速搬运的沉积环境中。

The middle oil-member is characterized by medium-sized sandstone and pebbled sandstone, with fair sorting and subangular sphaericity.Rock types mainly were feldspar debris sandstone.

中油主要沉积中砂岩和含砾中砂岩，粒度整体较粗，分选性较好，磨圆度以次棱角状为主，岩石类型为长石岩屑砂岩。

51. The cower unit of the Eagle is a wellsorted lithic and glauconitic marine sandstone.

伊格尔岩下部单元是分选良好岩屑质和海相海绿质。

Houses in the area are built of sandstone.

这个地屋都是用岩建。

An aquifer is a water-bearing rock stratum such as sandstone and chalk.

地下蓄水层是一些有水岩层, 如沙岩和白垩岩。

Made of arkosic sandstone, Uluru changes color in different lights, particularly at sunrise and sunset.

乌奴奴由长岩成，在不同光线下会变色，在日出日落时分尤其变化万千。

They mainly consist of sandstone,in which quartzarenite and litharenite are dominant and arkose is lack.

碎屑岩以岩类为主，其中又以英岩类和岩屑岩类为主，缺少长岩类。

But the reservoirs of coastwise bar, lacustrine bay sandstone and shore sand occur in each tract.

而沿岸坝、滩、湖湾等油气藏分布于各个体系域。

The platform foreslope is composed of the dark grey and celadon calcareous mudstone,siltstone,sandstone intercalated with limestone conglo...

内陆棚以深灰、灰绿色灰质泥岩夹浅灰色质、灰质纹层或条带为特征,并编制了该地桑塔木岩相古地理图。

Photo Gallery: Erosion and Weathering Wind erosion makes these layered sandstone hills swirl in Paria Canyon-Vermilion Cliffs Wilderness Area.

腐蚀和风化图片集。风侵蚀使这些层状岩丘陵漩涡Paria峡谷――朱红悬崖荒野地。

Cold production has been successfully applied to the heavy oil recovery in uncemented sandstones taking as a new production technology.

冷采作为一种新采油工艺,已成功地用于未胶结岩中稠油开采。

A Qatari man in a traditional white dishdasha robe and a wind-blown red-and-white kaffiyeh stands before a sandstone formation near Dukhan.

一个身着传统白色长袍，头戴红白图案头巾卡塔尔人站在杜砍附近一座岩前面。

The lithologies are dominated by alternating sandstones, shales and limestone, and the sedimentary environment based on shoreland tidal flat with swamp developed in the lower.

岩性为、页岩-灰岩互层，沉积环境以滨岸潮坪为主，下部沼泽发育。

The sandstones of the Turpan Basin belong mostly to graywacke and their compositional and textural maturity are generally low,indicating a strong erosional and rapid transportational environment.

吐-哈盆地岩主要属杂岩类，总结构成熟度和成分成熟度均较低，形成于强烈剥蚀、快速搬运沉积环境中。

The middle oil-member is characterized by medium-sized sandstone and pebbled sandstone, with fair sorting and subangular sphaericity.Rock types mainly were feldspar debris sandstone.

中油主要沉积中岩和含砾中岩，粒度整体较粗，分选性较好，磨圆度以次棱角状为主，岩类型为长岩屑岩。

51. The cower unit of the Eagle is a wellsorted lithic and glauconitic marine sandstone.

伊格尔砂岩下部单元是分选良好岩屑质和海相海绿质。

Houses in the area are built of sandstone.

这个地区房屋都是用砂岩建。

An aquifer is a water-bearing rock stratum such as sandstone and chalk.

地下蓄水层是一些有水岩层, 如沙岩和白垩岩。

Made of arkosic sandstone, Uluru changes color in different lights, particularly at sunrise and sunset.

乌奴奴由长砂岩成，在不同光线下会变色，在日出日落时分尤其变化万千。

They mainly consist of sandstone,in which quartzarenite and litharenite are dominant and arkose is lack.

碎屑岩以砂岩类为主，其中又以英砂岩类和岩屑砂岩类为主，缺少长砂岩类。

But the reservoirs of coastwise bar, lacustrine bay sandstone and shore sand occur in each tract.

而沿岸坝、滩砂、湖湾砂等油气藏分布于各个体系域。

The platform foreslope is composed of the dark grey and celadon calcareous mudstone,siltstone,sandstone intercalated with limestone conglo...

内陆棚以深、绿色质泥岩夹浅色砂质、质纹层或条带为特征,并编制了该地区桑塔岩相古地理图。

Photo Gallery: Erosion and Weathering Wind erosion makes these layered sandstone hills swirl in Paria Canyon-Vermilion Cliffs Wilderness Area.

腐蚀和风化图片集。风侵蚀使这些层状砂岩丘陵漩涡Paria峡谷――朱红悬崖荒野地区。

Cold production has been successfully applied to the heavy oil recovery in uncemented sandstones taking as a new production technology.

冷采作为一种新采油工艺,已成功地用于未胶结砂岩中稠油开采。

A Qatari man in a traditional white dishdasha robe and a wind-blown red-and-white kaffiyeh stands before a sandstone formation near Dukhan.

一个身着传统白色长袍，头戴红白图案头巾卡塔尔人站在杜砍附近一座砂岩前面。

The lithologies are dominated by alternating sandstones, shales and limestone, and the sedimentary environment based on shoreland tidal flat with swamp developed in the lower.

岩性为砂、页岩-岩互层，沉积环境以滨岸潮坪为主，下部沼泽发育。

The sandstones of the Turpan Basin belong mostly to graywacke and their compositional and textural maturity are generally low,indicating a strong erosional and rapid transportational environment.

吐-哈盆地砂岩主要属杂砂岩类，总结构成熟度和成分成熟度均较低，形成于强烈剥蚀、快速搬运沉积环境中。

The middle oil-member is characterized by medium-sized sandstone and pebbled sandstone, with fair sorting and subangular sphaericity.Rock types mainly were feldspar debris sandstone.

中油主要沉积中砂岩和含砾中砂岩，粒度整体较粗，分选性较好，磨圆度以次棱角状为主，岩类型为长岩屑砂岩。

51. The cower unit of the Eagle is a wellsorted lithic and glauconitic marine sandstone.

伊格尔砂的下部单元是分选良好的屑质海相海绿石质。

Houses in the area are built of sandstone.

区的房屋都是用砂建的。

An aquifer is a water-bearing rock stratum such as sandstone and chalk.

下蓄水层是一些有水的石层, 如沙白垩。

Made of arkosic sandstone, Uluru changes color in different lights, particularly at sunrise and sunset.

乌奴奴由长石砂成，在不同的光线下会变色，在日出日落时分尤其变化万千。

They mainly consist of sandstone,in which quartzarenite and litharenite are dominant and arkose is lack.

碎屑以砂为主，其中又以石英砂屑砂为主，缺少长石砂。

But the reservoirs of coastwise bar, lacustrine bay sandstone and shore sand occur in each tract.

而沿岸坝、滩砂、湖湾砂等油气藏分布于各体系域。

The platform foreslope is composed of the dark grey and celadon calcareous mudstone,siltstone,sandstone intercalated with limestone conglo...

内陆棚以深灰、灰绿色灰质泥夹浅灰色砂质、灰质纹层或条带为特征,并编制了该区桑塔木的相古理图。

Photo Gallery: Erosion and Weathering Wind erosion makes these layered sandstone hills swirl in Paria Canyon-Vermilion Cliffs Wilderness Area.

腐蚀风化图片集。风的侵蚀使些层状砂丘陵漩涡的Paria峡谷――朱红悬崖的荒野区。

Cold production has been successfully applied to the heavy oil recovery in uncemented sandstones taking as a new production technology.

冷采作为一种新的采油工艺,已成功用于未胶结砂中的稠油开采。

A Qatari man in a traditional white dishdasha robe and a wind-blown red-and-white kaffiyeh stands before a sandstone formation near Dukhan.

一身着传统白色长袍，头戴红白图案头巾的卡塔尔人站在杜砍附近的的一座砂前面。

The lithologies are dominated by alternating sandstones, shales and limestone, and the sedimentary environment based on shoreland tidal flat with swamp developed in the lower.

性为砂、页-灰互层，沉积环境以滨岸潮坪为主，下部沼泽发育。

The sandstones of the Turpan Basin belong mostly to graywacke and their compositional and textural maturity are generally low,indicating a strong erosional and rapid transportational environment.

吐-哈盆的砂主要属杂砂，总的结构成熟度成分成熟度均较低，形成于强烈剥蚀、快速搬运的沉积环境中。

The middle oil-member is characterized by medium-sized sandstone and pebbled sandstone, with fair sorting and subangular sphaericity.Rock types mainly were feldspar debris sandstone.

中油主要沉积中砂含砾中砂，粒度整体较粗，分选性较好，磨圆度以次棱角状为主，石型为长石屑砂。

51. The cower unit of the Eagle is a wellsorted lithic and glauconitic marine sandstone.

伊格尔砂的下部单元是选良好的屑质和海相海绿质。

Houses in the area are built of sandstone.

这个地区的房屋都是用砂建的。

An aquifer is a water-bearing rock stratum such as sandstone and chalk.

地下蓄水是一些有水的, 如沙和白垩。

Made of arkosic sandstone, Uluru changes color in different lights, particularly at sunrise and sunset.

乌奴奴由长砂成，在不同的光线下会变色，在日出日尤其变化万千。

They mainly consist of sandstone,in which quartzarenite and litharenite are dominant and arkose is lack.

碎屑以砂类为主，其中又以英砂类和屑砂类为主，缺少长砂类。

But the reservoirs of coastwise bar, lacustrine bay sandstone and shore sand occur in each tract.

而沿岸坝、滩砂、湖湾砂等油气藏布于各个体系域。

The platform foreslope is composed of the dark grey and celadon calcareous mudstone,siltstone,sandstone intercalated with limestone conglo...

内陆棚以深灰、灰绿色灰质泥夹浅灰色砂质、灰质纹或条带为特征,并编制了该地区桑塔木的相古地理图。

Photo Gallery: Erosion and Weathering Wind erosion makes these layered sandstone hills swirl in Paria Canyon-Vermilion Cliffs Wilderness Area.

腐蚀和风化图片集。风的侵蚀使这些状砂丘陵漩涡的Paria峡谷――朱红悬崖的荒野地区。

Cold production has been successfully applied to the heavy oil recovery in uncemented sandstones taking as a new production technology.

冷采作为一种新的采油工艺,已成功地用于未胶结砂中的稠油开采。

A Qatari man in a traditional white dishdasha robe and a wind-blown red-and-white kaffiyeh stands before a sandstone formation near Dukhan.

一个身着传统白色长袍，头戴红白图案头巾的卡塔尔人站在杜砍附近的的一座砂前面。

The lithologies are dominated by alternating sandstones, shales and limestone, and the sedimentary environment based on shoreland tidal flat with swamp developed in the lower.

性为砂、页-灰互，沉积环境以滨岸潮坪为主，下部沼泽发育。

The sandstones of the Turpan Basin belong mostly to graywacke and their compositional and textural maturity are generally low,indicating a strong erosional and rapid transportational environment.

吐-哈盆地的砂主要属杂砂类，总的结构成熟度和成成熟度均较低，形成于强烈剥蚀、快速搬运的沉积环境中。

The middle oil-member is characterized by medium-sized sandstone and pebbled sandstone, with fair sorting and subangular sphaericity.Rock types mainly were feldspar debris sandstone.

中油主要沉积中砂和含砾中砂，粒度整体较粗，选性较好，磨圆度以次棱角状为主，类型为长屑砂。

51. The cower unit of the Eagle is a wellsorted lithic and glauconitic marine sandstone.

伊格尔砂岩的下部单元是分选良好的岩屑和海相海绿石。

Houses in the area are built of sandstone.

这个地区的房屋都是用砂岩建的。

An aquifer is a water-bearing rock stratum such as sandstone and chalk.

地下蓄水层是一些有水的岩石层, 如沙岩和白垩岩。

Made of arkosic sandstone, Uluru changes color in different lights, particularly at sunrise and sunset.

乌奴奴由长石砂岩成，在不同的光线下会变，在日出日落时分尤其变化万千。

They mainly consist of sandstone,in which quartzarenite and litharenite are dominant and arkose is lack.

碎屑岩以砂岩类为主，其中又以石英砂岩类和岩屑砂岩类为主，缺少长石砂岩类。

But the reservoirs of coastwise bar, lacustrine bay sandstone and shore sand occur in each tract.

而沿岸坝、滩砂、湖湾砂等油气藏分布于各个体系域。

The platform foreslope is composed of the dark grey and celadon calcareous mudstone,siltstone,sandstone intercalated with limestone conglo...

内陆棚以深、绿泥岩夹浅砂、纹层或条带为特征,并编制了该地区桑塔木的岩相古地理图。

Photo Gallery: Erosion and Weathering Wind erosion makes these layered sandstone hills swirl in Paria Canyon-Vermilion Cliffs Wilderness Area.

腐蚀和风化图片集。风的侵蚀使这些层状砂岩丘陵漩涡的Paria峡谷――朱红的荒野地区。

Cold production has been successfully applied to the heavy oil recovery in uncemented sandstones taking as a new production technology.

冷采作为一种新的采油工艺,已成功地用于未胶结砂岩中的稠油开采。

A Qatari man in a traditional white dishdasha robe and a wind-blown red-and-white kaffiyeh stands before a sandstone formation near Dukhan.

一个身着传统白长袍，头戴红白图案头巾的卡塔尔人站在杜砍附近的的一座砂岩前面。

The lithologies are dominated by alternating sandstones, shales and limestone, and the sedimentary environment based on shoreland tidal flat with swamp developed in the lower.

岩性为砂、页岩-岩互层，沉积环境以滨岸潮坪为主，下部沼泽发育。

The sandstones of the Turpan Basin belong mostly to graywacke and their compositional and textural maturity are generally low,indicating a strong erosional and rapid transportational environment.

吐-哈盆地的砂岩主要属杂砂岩类，总的结构成熟度和成分成熟度均较低，形成于强烈剥蚀、快速搬运的沉积环境中。

The middle oil-member is characterized by medium-sized sandstone and pebbled sandstone, with fair sorting and subangular sphaericity.Rock types mainly were feldspar debris sandstone.

中油主要沉积中砂岩和含砾中砂岩，粒度整体较粗，分选性较好，磨圆度以次棱角状为主，岩石类型为长石岩屑砂岩。

51. The cower unit of the Eagle is a wellsorted lithic and glauconitic marine sandstone.

伊岩的下部单元是分选良好的岩屑质和海相海绿石质。

Houses in the area are built of sandstone.

这个地区的房屋都是用岩建的。

An aquifer is a water-bearing rock stratum such as sandstone and chalk.

地下蓄水层是一些有水的岩石层, 如沙岩和白垩岩。

Made of arkosic sandstone, Uluru changes color in different lights, particularly at sunrise and sunset.

乌奴奴由长石岩成，在不同的光线下会变色，在日出日落时分尤其变化万千。

They mainly consist of sandstone,in which quartzarenite and litharenite are dominant and arkose is lack.

碎屑岩以岩类为主，其中又以石英岩类和岩屑岩类为主，缺少长石岩类。

But the reservoirs of coastwise bar, lacustrine bay sandstone and shore sand occur in each tract.

而沿岸坝、滩、湖湾气藏分布于各个体系域。

The platform foreslope is composed of the dark grey and celadon calcareous mudstone,siltstone,sandstone intercalated with limestone conglo...

内陆棚以深灰、灰绿色灰质泥岩夹浅灰色质、灰质纹层或条带为特征,并编制了该地区桑塔木的岩相古地理图。

Photo Gallery: Erosion and Weathering Wind erosion makes these layered sandstone hills swirl in Paria Canyon-Vermilion Cliffs Wilderness Area.

腐蚀和风化图片集。风的侵蚀使这些层状岩丘陵漩涡的Paria峡谷――朱红悬崖的荒野地区。

Cold production has been successfully applied to the heavy oil recovery in uncemented sandstones taking as a new production technology.

冷采作为一种新的采工艺,已成功地用于未胶结岩中的稠开采。

A Qatari man in a traditional white dishdasha robe and a wind-blown red-and-white kaffiyeh stands before a sandstone formation near Dukhan.

一个身着传统白色长袍，头戴红白图案头巾的卡塔人站在杜砍附近的的一座岩前面。

The lithologies are dominated by alternating sandstones, shales and limestone, and the sedimentary environment based on shoreland tidal flat with swamp developed in the lower.

岩性为、页岩-灰岩互层，沉积环境以滨岸潮坪为主，下部沼泽发育。

The sandstones of the Turpan Basin belong mostly to graywacke and their compositional and textural maturity are generally low,indicating a strong erosional and rapid transportational environment.

吐-哈盆地的岩主要属杂岩类，总的结构成熟度和成分成熟度均较低，形成于强烈剥蚀、快速搬运的沉积环境中。

The middle oil-member is characterized by medium-sized sandstone and pebbled sandstone, with fair sorting and subangular sphaericity.Rock types mainly were feldspar debris sandstone.

中主要沉积中岩和含砾中岩，粒度整体较粗，分选性较好，磨圆度以次棱角状为主，岩石类型为长石岩屑岩。

51. The cower unit of the Eagle is a wellsorted lithic and glauconitic marine sandstone.

伊格尔砂岩的下部单元是分选良好的岩屑质和海相海绿质。

Houses in the area are built of sandstone.

这个地区的房屋都是用砂岩建的。

An aquifer is a water-bearing rock stratum such as sandstone and chalk.

地下蓄水层是一些有水的岩层, 如沙岩和白垩岩。

Made of arkosic sandstone, Uluru changes color in different lights, particularly at sunrise and sunset.

乌奴奴由长砂岩成，在不同的光线下会变色，在日出日落时分尤其变化万千。

They mainly consist of sandstone,in which quartzarenite and litharenite are dominant and arkose is lack.

碎屑岩以砂岩类为主，其中又以英砂岩类和岩屑砂岩类为主，缺少长砂岩类。

But the reservoirs of coastwise bar, lacustrine bay sandstone and shore sand occur in each tract.

而沿岸坝、滩砂、湖湾砂等油气藏分布于各个体系域。

The platform foreslope is composed of the dark grey and celadon calcareous mudstone,siltstone,sandstone intercalated with limestone conglo...

内陆棚以深灰、灰绿色灰质泥岩夹浅灰色砂质、灰质纹层或条带为特征,并编地区桑塔木的岩相古地理图。

Photo Gallery: Erosion and Weathering Wind erosion makes these layered sandstone hills swirl in Paria Canyon-Vermilion Cliffs Wilderness Area.

腐蚀和风化图片集。风的侵蚀使这些层状砂岩丘陵漩涡的Paria峡谷――朱红悬崖的荒野地区。

Cold production has been successfully applied to the heavy oil recovery in uncemented sandstones taking as a new production technology.

冷采作为一种新的采油工艺,已成功地用于未胶结砂岩中的稠油开采。

A Qatari man in a traditional white dishdasha robe and a wind-blown red-and-white kaffiyeh stands before a sandstone formation near Dukhan.

一个身着传统白色长袍，戴红白图案巾的卡塔尔人站在杜砍附近的的一座砂岩前面。

The lithologies are dominated by alternating sandstones, shales and limestone, and the sedimentary environment based on shoreland tidal flat with swamp developed in the lower.

岩性为砂、页岩-灰岩互层，积环境以滨岸潮坪为主，下部沼泽发育。

The sandstones of the Turpan Basin belong mostly to graywacke and their compositional and textural maturity are generally low,indicating a strong erosional and rapid transportational environment.

吐-哈盆地的砂岩主要属杂砂岩类，总的结构成熟度和成分成熟度均较低，形成于强烈剥蚀、快速搬运的积环境中。

The middle oil-member is characterized by medium-sized sandstone and pebbled sandstone, with fair sorting and subangular sphaericity.Rock types mainly were feldspar debris sandstone.

中油主要积中砂岩和含砾中砂岩，粒度整体较粗，分选性较好，磨圆度以次棱角状为主，岩类型为长岩屑砂岩。