Tree rings and seasonal sedimentary deposits called varves can be counted to determine absolute age.

可以对树木的年轮被称为纹泥的季节性沉积物进行计数来确定其绝对年龄。

The deposit was produced by superimposition of the hot-water sedimentary mineralization and magmatic hydatogenesis.

该矿床是热水沉积成矿作用与浆热液成矿作用叠加成矿的产物。

Texture of sedimentary rock: clastic texture and nonclastic texture.

碎屑结构非碎屑结构。

The deformation belts are formed by Late Carboniferous rocks, mainly mylonitization volcanic rocks and volcanic clastic sedimentary rocks.

变形带由下石炭统干墩组组成，为一套糜棱化火山、火山碎屑沉积。

The primary rocks were sparry oolitic limestone and micrite oolitic limestone, but dolomitization destroyed the original sedimentary textures.

石为亮晶鲕粒石灰泥晶鲕粒石灰，白云石化作用使其石结构大多遭受破坏。

The strata strike NE,and its rock association are consisted of pyroclastic sedimentary rock,micrite and pyroclastic rocks,and containts brachiopoda,coral,bryozoan.

时代属于中泥盆世早期,大体相当于艾菲尔阶-吉维特阶,应归属为大民山组。

Lead and selenium mainly exist in galena, clausthalite, and selenio-galena which occur as cell-filling of coal-forming plants and are of chemical-sedimentary origin.

铅硒主要赋存在方铅矿、硒铅矿硒方铅矿中，这3种矿物以植物胞腔充填形式出现，属于化学沉积成因。

The paleo-geomorphy before the sedimentary of the Permian formation is recovered with the Moulage method, then the karst geomorphy unit is partitioned.

采用印模法恢复出本区二叠系沉积前的古地，划分出溶地，古地恢复表明，研究区古地总体表现为起伏不大，西高东低，相对高差最大约130米。

Ichnofabric analysis displays a rising significance on accurate environmental interpretation of sedimentary units in oil-bearing basin and precise recognition of depositional disconuities.

近年来，遗迹组构分析其日益增长的意义主要表现在含油气盆地地层成因环境的精确解释各类不连续面的精细识别。

The khondalite lithology is composed of a suit of metamorphic aluminium-sedimentary rock.During the Jinning movement, the sedmentary rock experienced four stages of metamorphism.

明确黄陵地区孔兹系为一套变质的富铝质沉积组合，在晋宁期造山运动期间该套系经历四期变质作用。

By using sulpho acid to dissociate samples, using spectrophotometric method to determine micro-chrome in drainage sedimentary is very easy and simple with low cost.

采用王水分解样品,分光光度法测定水系沉积物样品中微量铬,方法简便,易操作,成本低。

These basins were generally filled with upward fining and deepening sedimentary sequence that comprises nonmarine to marine, shallow marine to deep marine depositional systems.

在盆地内堆积了从陆相到海相，从浅水到深水的各种沈积体系，组成向上变细变深的充填序列。

We searched other major valleys sporting outcrops of the same volcanically derived sedimentary rocks, which are exposed across thousands of square kilometers of mountainous terrain.

我们探查其他主要的山谷，寻找同样衍自火山的沉积层露头，这些露头分布在整个山区，范围广达数千平方公里。

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 sedimentary facies in Heshilafu is an alluvial fan - fan delta -lake systetn, and it can be further devided into several parfacies including microfacies.

什拉甫地区沉积相类型为冲积扇──扇三角洲──湖泊沉积体系，进一步分为几种亚相类型微相类型。

Dissolution is controlled by both sedimentation and tectonization, and the converted degree on reservoirs is closely related to sedimentary facies and the distance from unconformity interfaces.

溶解作用受沉积构造作用的控制，其对储层的改造程度与沉积相带及距不整合面的距离密切相关。

According to the characters of the palynoflora, the Late Triassic palaeoecological, palaeoclimatic and palaeogeographic characters as well as the sedimentary environments in the region were discussed.

根据孢粉植物群的特征探讨了该区晚三叠世古态、古气候、古地理沉积环境。

Perhaps the future role of the sedimentary petrologist will be as an interpreter and an arbiter of cases too complex for the machine to decide unaided.

沉积石学家将来的作用也许是作为机械不能独立解决复杂情况的解释者仲裁者。

Research shows that the dawsonite in Hailaer Basin exists in both the eroded volcano tuff and sedimentary volcano tuff,and is paragenous with corrensite and allevardite frequently.

研究表明,海拉尔盆地的碳钠铝石存在于火山凝灰或沉积凝灰中,常与柯绿泥石钠板石共,形成凝灰质蚀变的特征标型矿物组合。

The author suggests that the Zhiluo Formation belongs to the typical fluvial sedimentary facies, which cab be further refined to the channel, flood-plain and backswamp microfacies.

研究认为，直罗组属典型的河流相沉积，进一步可细分为河床亚相、河漫滩亚相漫滩沼泽亚相。