Silicate sand grains, which are a product of physical and chemical weathering of bedrock, form sandstones. Hence it is a clastic sedimentary rock consisting mostly of quartz and feldpar, the two minerals most resistant to weathering on the earth's surface. But the most interesting thing for me from what I encountered on a seashore in Aceh, Sumatra, is precisely what is produced by a process of erosion of the sandstone there.
The sandstone rock popped out of the cliff of a hill like the hooves of a monster dipping its feet into the ocean (I fantasize). Some anglers seem to find a good place to fish up there.
Although sandstones are the rock most resistant to weathering, it seems that the process of erosion has succeeded in forming very neat cuts and even some sort of ornamental carvings on the surface. The reliefs on the surface of the sandstone rocks seem to present a very interesting natural work of art to be enjoyed.
Where it could be covered by the rising tide several types of seaweed seemed to thrive and some mollusks were also seen clinging to it.
Not only that, the nature there also becomes more beautiful when the light of the setting sun hits the surface of the sandstone, leaving in the memory an impressive natural sight.