Title: Environmental Surveys.Rock types.Sedimentary rocks.Siltite - Siltite

Sedimentaire gesteentes - Siltite 

Page / - last modified by TerraIndex TerraIndex on 2021/09/30 15:18 

Siltite 
last modified by TerraIndex TerraIndex
on 2021/09/30 15:18

Table of Contents

A compact, weakly metamorphosed rock formed by alteration of siltstone, mudstone, or silty shale.
Characteristics
A compact, weakly metamorphosed rock formed by alteration of siltstone, mudstone, or silty shale. Siltite is more indurated than mudstone or shale and lacks either shale fissility or slate-like cleavage. Siltite differs from argillite in that silt-size grains (0.002 to 0.062 mm) dominate the matrix rather than clay-size particles (<0.002 mm). Siltite differs from siltstone, mudstone, or shale in that it exhibits very low to low grade metamorphic or diagenetic layer silicate and feldspar alteration to sericite, chlorite, and albite.
References
•	NEN-EN-ISO 14688-1:2019
•	https://geology.com/rocks/siltstone.shtml
Siltite

Group | Metamorphic sedimentary rock
Texture | Fine grained
Clasts | 0.008mm-0.06mm
Hardness | Medium hard
Color | Gray, brown, or reddish brown.
Minerals | A mixture of clay minerals, micas, feldspars, and quartz.
Touch | Smooth to rough
Image | Siltite
Contents
•	Characteristics
•	References
•	Siltite