准平原

Based on studies of ore - bearing rocks and geochemistry, it is suggested that bauxite deposits in western Jiyuan were sediments in lake - environments after transgression when North China Block turned from peneplain in early Paleozoic to epeiric sea in late Paleozoic.

中文摘要：文章在对含矿岩系岩石组合、地球化学分析的基础上，认为矿区铝土矿形成于华北地块从早古生代准平原状态向晚古生代陆表浅海过渡时期，早期海侵之后的陆地湖泊环境中。

About 1.7-1.6Ma. B. P, phase C of the Qinghai-xizang Movement made the yellow River cut down the"Gansu Peneplain"and drained off the water of Dong shah paleolake, so that the loess was preserved in the Lanzhou region.

在1.7-1.6Ma.B.P前后，青藏运动C带使黄河自临夏盆地的"甘肃期准平原面"下切，排干了东山古湖之水，从而使研究区内有了得以保存黄土堆积的条件。

The tectonic evolution history of Tianshan is an example. In the Triassic, it was once uplifted to form the mountains with thick molasse accumulation on both its sides, Junggar and Tarim Basins. Then it became a peneplain by the exposion and deplanation in the Jurassic, forming the widespread coal-bearing strata which can be correlated. From the Cretaceous to the Early Cenozoic, it was uplifted again, until the Quaternary to build huge mountains with two large sedimentary basins on both sides.

如天山山脉的构造演化，三叠纪天山曾经一度隆起成山，两侧的准噶尔和塔里木盆地中堆积了巨厚的磨拉石；侏罗纪时由於剥蚀夷平成为一个准平原，形成了广泛分布且可以对比的含煤岩系；从白垩纪到早新生代，它再度隆升，直至第四纪时形成雄伟的高大山系，两侧形成相应的大型沈积盆地。

The study area is located in the W-E fault valley 68 km west to Yumenguan, on a residual hill peneplain of the North Mountain north to Suleihe billabong (90°～90°10′E,40°30′～40°34′N). There, the paleo-lacustrine sediments composing Yardang landform is deposited in the period of Middle and even Early Pleistocene.

玉门关西雅丹地貌位于玉门关以西68 km的疏勒河故道北面北山剥蚀残丘准平原的东西向断层谷地中（90°00′～90°10′E， 40°30′～40°34′N），该区雅丹地貌组成的古湖相地层被推测形成于中更新世甚至早更新世，中更新世末的新构造运动湖水向西撤退，随即被晚更新世的戈壁砾石层覆盖。

Upstream incision of rivers led to westward motion of boundary between internally and externally drained regions and disappearance of paleo-lakes in Quaternary, and Quaternary incision of external rivers gradually formed present topography characterized by deep valleys, high mountains and remained peneplain in eastern Tibetan Plateau.

中新世晚期-第四纪以湖面与五道梁群湖相沉积顶面为基准，在高海拔环境下继续发生剥蚀夷平和准平原化，逐步形成主夷平面或高原面。第四纪河流溯源侵蚀导致内外流水系分界线自东向西迁移，在青藏高原东部形成高山峡谷地貌。

But there are no many tectonic events during this period. From middle Miocene to late Miocene there is a stage of peneplanation in the South China Sea and there are many tectonic events in this area, such as stratum unconformable contact, faults, deformation and magmatism.

而符合南海地区准平原化阶段的时代是在中中新世末至晚中新世(N21/N31)之间，在此时段普遍存在区域构造不整合接触和地层缺失、断裂、变形及火山活动等构造变动事件。

River bed longitudinal profile ; aggradation ; downward sedimentation ; peneplane ; headward sedimentation ; old-stage stream

黄河河床纵剖面；加积作用；沿程淤积；溯源淤积；准平原；老年期河流

The tectonic evolution of southern Junggar basin can be classified into seven stages: stage of intracontinental rift from middle Periman to late Late Carboniferous; stage of weak extension and peneplane from late Permian to early Triassic; stable depression stage in middle-late Triassic; maximal basin formation phase in the setting of weak extension in early-middle Jurassic; inactive depressed basin formation phase in thrust setting in middle-late Jurassic; stable depression stage in Cretaceous and Eogene; foreland depressed basin formation phase in thrust setting in Neocene and Quaternary.

准噶尔盆地南缘晚石炭世以来盆地构造演化可划分为七个演化阶段：晚石炭世—中二叠世陆内裂谷作用阶段；晚二叠世到早三叠世处于弱伸展-稳定坳陷作用阶段；中、晚三叠世准平原化作用阶段；早、中侏罗世为弱伸展背景下广盆形成阶段；中、晚侏罗世冲断背景下的坳陷盆地形成阶段；白垩纪到古近纪弱伸展背景下的稳定坳陷盆地形成阶段；新近纪—第四纪为冲断背景下的前陆坳陷盆地形成阶段。

So as this view, the stratum between early and late Tertiary should be unconformable.

而符合南海地区准平原化阶段的时代是在中中新世末至晚中新世(N12/N13)之间，在此时段普遍存在区域构造不整合接触和地层缺失、断裂、变形及火山活动等构造变动事件。

One is that,by the shove of passive rift valley polycycle,quartz sandstone with high maturity of lithologic composition deposits on the background of sub-plain during sag period;together with the rock formation environment of paranormal saltless local water,the reservoir characterized b.

厘定该盆地这种突出商业价值的地质因素主要表现在以下两个方面：1被动裂谷的多旋回推移，在坳陷期的准平原背景下沉积了高岩石成分成熟度的石英砂岩，加之超淡地层水的成岩环境，最终形成盆地的高孔高渗储层；2&教科书&式的生储盖组合。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。