Siltstone is a clastic sedimentary rock. As its name implies, source
Siltstone is a clastic sedimentary rock. As its name implies,
Siltstone is primarily composed (greater than 2/3) of silt sized particles. source
Siltstone is primarily composed (greater than 2/3) of silt sized particles.
Siltstone defined as grains 2–62 µm or 4 to 8 on the Krumbein phi (φ) scale. source
Siltstone defined as grains 2–62 µm or 4 to 8 on the Krumbein phi (φ) scale.
Siltstones differ significantly from sandstones due to their smaller pores and higher propensity for containing a significant clay fraction. source
Siltstones differ significantly from sandstones due to their smaller pores and higher propensity for containing a significant clay fraction.
A siltstone lacks the fissility and laminations which are typical of shale. source
A siltstone lacks the fissility and laminations which are typical of shale.
Siltstones may contain concretions. source
Siltstones may contain concretions.
Unless the siltstone is fairly shaly, stratification is likely to be obscure. source
Unless the siltstone is fairly shaly, stratification is likely to be obscure.
Siltstones tends to weather at oblique angles unrelated to bedding. source
Siltstones tends to weather at oblique angles unrelated to bedding.
Siltstone is differentiated by having a majority silt, not clay. source
Siltstone is differentiated by having a majority silt, not clay.
A siltstone is a lithified, non-fissile mudrock. In order for a rock to be named a siltstone, source
A siltstone is a lithified, non-fissile mudrock. In order for a rock to be named a siltstone,
A siltstone is believed to be the product of physical weathering, which can involve freezing and thawing, thermal expansion, and release of pressure source
A siltstone is believed to be the product of physical weathering, which can involve freezing and thawing, thermal expansion, and release of pressure
Siltstone occurs in a wide range of colors. source
Siltstone occurs in a wide range of colors.
Siltstone can be difficult to identify in the field without close examination. source
Siltstone can be difficult to identify in the field without close examination.
Siltstone has very few uses. It is rarely the target of mining for use as a construction material or manufacturing feedstock. source
Siltstone has very few uses. It is rarely the target of mining for use as a construction material or manufacturing feedstock.
A siltstone is believed to be the product of physical weathering. source
A siltstone is believed to be the product of physical weathering.
