1. Up to 10% cash back  · arthrolite, Arthrolith [ A cylindrical concretion intersected by transverse cracks and found in shales, marls and clays] Arthrolith m

2. For example, Argillaceous limestones are limestones consisting predominantly of calcium carbonate, but including 10-40% of clay minerals: such limestones, when soft, are often called marls.

3. For example, Argillaceous limestones are limestones consisting predominantly of calcium carbonate, but including 10-40% of clay minerals: such limestones, when soft, are often called marls.

4. The new ammonoid speciesDesmoceras (Pseudouhligella) intrapunctatum (DesmoceratoideaZittel, 1895) is described and figured from the dark glauconitic marls of the Lower Albian of Ambatolafia (Mahajanga Basin of northwestern Madagascar).

5. Chalcedony can be found as vein fillings or crusts in volcanic rocks, as the main constituent in silica-rich marine sedimentary rocks, as layers in limestone and marls, as cement in sandstones, and as a fossilizing material

6. The post-Cambrian marine sedimentation is made up of alternate layers of limestone, dolomites, schists and clays, with the successive series of Pliocene sedimentations represented by basal conglomerates, marls, clays and finally loose sandstones and sand

7. The post-Cambrian marine sedimentation is made up of alternate layers of limestone, dolomites, schists and clays, with the successive series of Pliocene sedimentations represented by basal conglomerates, marls, clays and finally loose sandstones and sand.