1)  calcareous sandstone
灰质砂岩
2)  Tuffaceous sands
凝灰质砂岩
3)  Gray matter
灰质
1.
Analysis of magnetic resonance image for heterotopia of cerebral gray matter-report of 9 cases;
脑灰质异位症的磁共振成像分析──附9例报告
2.
Methods Gray matter density were comprehensive assessed by means of VBM on T1 weighted imaging volume sets in 9 schizophrenia and 9 healthy subjects of similar age and gender ratio.
目的评价基于体素的形态学分析法(VBM)分析精神分裂症大脑灰质结构的价值。
3.
Eight new born dairy bulls were used for the study of laninar scheme and nuclear pattern of the gray matter in the spinal cord.
采用8头初生公奶牛犊的颈胸段各节脊髓,研究了脊髓灰质的分层。
4)  Gray matter volume
灰质容积
5)  Heterotopic gray matter
灰质异位
6)  Periventricular grey
室周灰质
参考词条
补充资料:粉砂岩
粉砂岩
siltstone

   由粒径为0.0625~0.0039毫米(mm)的粉砂的含量占50%以粉砂岩标本的一种碎屑沉积岩。除粉砂以外其它由砂、粘土或化学沉淀物组成。按粒度划分为粗粉砂岩(0.0625~0.0312mm)和细粉砂岩(0.0312~0.0039mm)。按碎屑成分划分为石英粉砂岩、长石粉砂岩、岩屑粉砂岩(少见)和它们间的过渡类型。根据胶结物成分划分为粘土质粉砂岩、铁质粉砂岩、钙质粉砂岩和白云质粉砂岩。黄土也是一种疏松的或半固结的粉砂质沉积物。粉砂岩多形成于河漫滩、三角洲、潟湖和海洋的较深水部位。
    
   

粉砂岩标本

粉砂岩标本

说明:补充资料仅用于学习参考,请勿用于其它任何用途。