Oolite (egg stone) is a sedimentary rock formed from ooids, spherical grains composed of concentric layers. The name derives from the Hellenic word òoion for egg.
例句与用法
1.
Oolite lime sand packs naturally with 40% porosity because the particles are essentially spheroids . 自然堆积的灰质鲕粒砂具有40的孔隙度，因为其颗粒其本上都是球状的。
2.
The thin - beded siliceous - rocks include chert and depositional quartz with textures of oolite and pebble 矽质岩包括燧石和沈积石英岩，呈薄层状产出，沈积石英岩具鲕状、砾状结构。
3.
The middle part is a set of large tidal range tidal sequence including oolitic shoal fades which is made up of bedded - oolite dolomite and oolite limestone , gypsum - tidal fades in sabkha environment which consists of bedded gypsolyte , and gypsolyte - bearing gypsum - dolomite tidal facies 中部为层状鲕粒白云岩、鲕粒灰岩的潮下鲕粒滩相与萨布哈环境的富层状石膏岩的膏坪相、含石膏岩的膏云坪相组成的大潮差蒸发潮坪层序。
4.
However , the authors discovered recently that the top and bottom surfaces of the loushanguan formation are palaeokarst unconformity interfaces , and there are a lot of interbeds of granular ( oolite , pisolite and oncolite ) dolomite and algae - mat dolomite , especially sedimentary structures such as the bird ? s eye , stromatolite , cross bedding and tepee structures 但笔者新近研究发现，其顶、底均为古岩溶不整合面，并有大量颗粒(鲕、豆、核形石)白云岩和藻纹层白云岩夹层，还有许多鸟眼构造、叠层石构造、交错层理、帐蓬构造存在。
5.
Owing to extensive distribution of the oolite in t1f3 in west hubei and east chongqing , the oolitic beach reservoir is becoming a focus to research in the region . based on the monographic studies of depositional environment and sedimentary facies , diagenesis and pore evolvement , elementary characteristics of the reservoir , the paper endeavored to educe comprehensive appreciation and forecast to oolitic beach reservoir in t1f3 in west hubei and east chongqing 本论文即围绕鲕滩储层这个中心，在对沉积环境与沉积相、成岩作用与孔隙演化以及储层基本特征等进行专题研究的基础上，力争对鄂西渝东区飞三段鲕滩储层作出综合评价与预测。
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