化學組成, 鍵及結構：(礦物)

Chemical composition, bonding and structure: (Mineral)

原生物：(化石)

粉砂岩是主要由粉砂碎屑組成的沉積岩, 沙石會因為被雨水或被浪沖去岸邊而慢慢一層一層地堆積, 隨著時間的過去, 他們會被擠壓而形成粉砂岩.

Living Specimens: (Fossil)

Siltstone is formed by smaller than sand sized particles. Silt accumulates in sedimentary basins throughout the world. The sand are washed by surface runoff or tidal wave and they accumulates near the sea and the particles are compacted with each other and formed siltstone.

粉砂岩主要由粉砂碎屑組成的, 它的顏色呈多種, 有灰色, 啡色, 紅色等

它非常脆弱

它是一層層的

Siltstone is primarily composed of silt sized particles, it is not the same as mudstone or shale that contains mud, it is differentiated by having a majority silt, not clay. The color of it is usually gray, brown, or reddish brown.

It is fragile

It have strata

粉砂岩很少使用在建築上, 甚至很少被稱為挖掘材料, 因為粉砂岩中的粒間孔隙空間太小，不能充當良好的含水層。 

Siltstone has very few uses. It is rarely the target of mining for use as a construction material or manufacturing feedstock. The intergranular pore spaces in siltstone are too small for it to serve as a good aquifer.

粉砂岩多形成於河漫灘、三角洲、潟湖和海洋的較深水部位。

siltstones are formed in deeper parts of floodplains, deltas, lagoons, and oceans.