For chemical weathering to turn a sandstone into a pile of sand, the sandstone would have to have been cemented by a mineral that was easily attacked by weakly acidic rainfall, most likely calcite. The acidic rainfall would dissolve the cementing material through chemical reaction, leaving the chemically resistant sand grains behind.
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Chemical weathering on sandstones occurs when minerals within the rock, such as feldspar and other silicates, undergo processes like hydrolysis and oxidation. These reactions weaken the rock structure, causing it to break down into smaller particles like sand. Over time, repeated exposure to rain, moisture, and temperature fluctuations accelerates this process, ultimately reducing the sandstone to a pile of sand.
A moose? A moose has the same chemical equations going on as any large herbivorous animal, and there are a pile of them.
The fan-shaped pile of broken rock fragments at the base of a steep bedrock slope or cliff is known as a talus slope or talus cone. This debris results from the weathering and erosion of the bedrock above, where gravity causes the rock fragments to accumulate at the base of the slope.
A pile of grass is typically called a "grass heap" or a "grass pile."
This may be known as a scree slope or a talus pile. Talus and scree are normally used interchangeably, however scree normally refers to material of gravel size or smaller and talus to larger debris.
snowdrift