Sedimentaire gesteentes - Chalk marl

Page / - dernière modification par Roelof Zwaan le 2021/09/30 15:18

Chalk marl

dernière modification par Roelof Zwaan

le 2021/09/30 15:18

Table des matières

Chalk marl is not present at many places. It is a claylike structure with much CaCO3 present in the structure due to the large amount of fossils preserved in the hardened clay. These fossils date back to the Cretaceous period. Marl itself already contains a large amount of carbonate. It can contain up to 65% of CaCO3. Cretaceous marl can even contain up to 75% of CaCO3. Examples can be spotted close to Main and Dover.

Characterization

Some factors on which it can be recognized:

The texture is clastic.

The clasts are not visible with the naked eye and smaller than 0.06 mm.

It is a soft rock with a toughness of 2.6.

Its color is white.

Its clast compose of a mixture of chalk-minerals with a mixture of calcite, aragonite, dolomite and siderite.

It is smooth to touch.

References

https://en.wikipedia.org/wiki/Marl

Chalk Marl

Characteristics	Identification
Group	Clastic sedimentary rock
Texture	Fine-grained
Clasts	<0.06mm
Hardness	Soft
Color	White
Minerals	Calcite, Aragonite, Dolomite and Siderite
Touch	Smooth
Image	Source

Contents

Chalk marl

Characterization

References

Chalk Marl