Sediments - Sediments The most abundant sedimentary rocks:...

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Sediments The most abundant sedimentary rocks: In the table below the most abundant sedimentary rocks are described. There are several photographs of the described sediments on this page. The grainsize described, is the average grainsize. Shale 'Lithified' clay (grains are smaller than 0,004 millimetre). Breaks usually in thin slices. The rock is soft and erodes fast. This rock is ultimately an erosion product of igneous rocks. (See photo) Siltstone Siltstone consists of grains between 0,004 and 0,0062 millimetre. The grainsize is in between that of shale and sandstone. This rock is ultimately a erosion product of igneous rocks. Sandstone Sandstone consists of grains between 0,062 and 2 millimetre. This rock is also ultimately an erosion product of igneous rocks. (See photo) Conglomerate A conglomerate is a 'pebble stone' with rounded pebbles in a finer matrix. The pebbles are ranging between 2 millimetre to 4 metres (!). This rock is also ultimately an erosion product of igneous rocks. (See
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Sediments - Sediments The most abundant sedimentary rocks:...

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